/usr/bin/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/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:17:58,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:17:58,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:17:58,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:17:58,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:17:58,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:17:58,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:17:58,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:17:58,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:17:58,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:17:58,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:17:58,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:17:58,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:17:58,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:17:58,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:17:58,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:17:58,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:17:58,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:17:58,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:17:58,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:17:58,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:17:58,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:17:58,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:17:58,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:17:58,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:17:58,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:17:58,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:17:58,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:17:58,193 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 [2020-08-22 16:17:58,214 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:17:58,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:17:58,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:17:58,216 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:17:58,216 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:17:58,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:17:58,216 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:17:58,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:17:58,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:17:58,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:17:58,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:17:58,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:17:58,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:17:58,218 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:17:58,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:17:58,218 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:17:58,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:17:58,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:17:58,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:17:58,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:17:58,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:17:58,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:17:58,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:17:58,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:17:58,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:17:58,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:17:58,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:17:58,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:17:58,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:17:58,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:17:58,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:17:58,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:17:58,531 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:17:58,532 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:17:58,533 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:17:58,533 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-22 16:17:58,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/539ffa5fa/1a30b5dca78a4fc4bc85ba967aa9681f/FLAG595b378bb [2020-08-22 16:17:59,069 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:17:59,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-22 16:17:59,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/539ffa5fa/1a30b5dca78a4fc4bc85ba967aa9681f/FLAG595b378bb [2020-08-22 16:17:59,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/539ffa5fa/1a30b5dca78a4fc4bc85ba967aa9681f [2020-08-22 16:17:59,472 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:17:59,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:17:59,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:17:59,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:17:59,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:17:59,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:17:59" (1/1) ... [2020-08-22 16:17:59,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722a9776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:17:59, skipping insertion in model container [2020-08-22 16:17:59,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:17:59" (1/1) ... [2020-08-22 16:17:59,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:17:59,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:17:59,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:17:59,767 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:17:59,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:17:59,915 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:17:59,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:17:59 WrapperNode [2020-08-22 16:17:59,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:17:59,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:17:59,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:17:59,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:17:59,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:17:59" (1/1) ... [2020-08-22 16:17:59,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:17:59" (1/1) ... [2020-08-22 16:17:59,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:17:59" (1/1) ... [2020-08-22 16:17:59,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:17:59" (1/1) ... [2020-08-22 16:17:59,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:17:59" (1/1) ... [2020-08-22 16:17:59,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:17:59" (1/1) ... [2020-08-22 16:17:59,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:17:59" (1/1) ... [2020-08-22 16:17:59,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:17:59,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:17:59,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:17:59,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:17:59,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:17:59" (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 [2020-08-22 16:18:00,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:18:00,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:18:00,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:18:00,013 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 16:18:00,013 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 16:18:00,013 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 16:18:00,013 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:18:00,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:18:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 16:18:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 16:18:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:18:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 16:18:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 16:18:00,014 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 16:18:00,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:18:00,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:18:00,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:18:00,438 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:18:00,439 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 16:18:00,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:18:00 BoogieIcfgContainer [2020-08-22 16:18:00,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:18:00,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:18:00,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:18:00,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:18:00,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:17:59" (1/3) ... [2020-08-22 16:18:00,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52014f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:18:00, skipping insertion in model container [2020-08-22 16:18:00,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:17:59" (2/3) ... [2020-08-22 16:18:00,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52014f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:18:00, skipping insertion in model container [2020-08-22 16:18:00,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:18:00" (3/3) ... [2020-08-22 16:18:00,459 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-22 16:18:00,468 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:18:00,479 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:18:00,493 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:18:00,521 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:18:00,522 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:18:00,522 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:18:00,522 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:18:00,522 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:18:00,523 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:18:00,523 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:18:00,523 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:18:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-22 16:18:00,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 16:18:00,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:00,557 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:00,559 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:00,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-22 16:18:00,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:00,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261238945] [2020-08-22 16:18:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:00,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:00,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:00,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:00,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:00,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:00,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 16:18:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:00,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261238945] [2020-08-22 16:18:00,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254992919] [2020-08-22 16:18:00,929 INFO L95 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 [2020-08-22 16:18:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-08-22 16:18:01,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 16:18:01,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:01,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-08-22 16:18:01,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368409866] [2020-08-22 16:18:01,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:18:01,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:01,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:18:01,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:18:01,177 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-08-22 16:18:01,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:01,242 INFO L93 Difference]: Finished difference Result 118 states and 174 transitions. [2020-08-22 16:18:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:18:01,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-08-22 16:18:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:01,254 INFO L225 Difference]: With dead ends: 118 [2020-08-22 16:18:01,255 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 16:18:01,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:18:01,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 16:18:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-22 16:18:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 16:18:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2020-08-22 16:18:01,308 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 48 [2020-08-22 16:18:01,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:01,310 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2020-08-22 16:18:01,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:18:01,310 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2020-08-22 16:18:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 16:18:01,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:01,313 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:01,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-08-22 16:18:01,515 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:01,516 INFO L82 PathProgramCache]: Analyzing trace with hash -880454641, now seen corresponding path program 1 times [2020-08-22 16:18:01,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:01,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944581950] [2020-08-22 16:18:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:01,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:01,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:01,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:01,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:01,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:01,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 16:18:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:01,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944581950] [2020-08-22 16:18:01,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978866503] [2020-08-22 16:18:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:18:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:01,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:18:01,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 16:18:01,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:01,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-08-22 16:18:01,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126101284] [2020-08-22 16:18:01,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:18:01,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:01,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:18:01,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:18:01,769 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 4 states. [2020-08-22 16:18:01,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:01,802 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-08-22 16:18:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:18:01,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-08-22 16:18:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:01,805 INFO L225 Difference]: With dead ends: 64 [2020-08-22 16:18:01,805 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 16:18:01,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:18:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 16:18:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-22 16:18:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 16:18:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2020-08-22 16:18:01,815 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 50 [2020-08-22 16:18:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:01,815 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2020-08-22 16:18:01,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:18:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2020-08-22 16:18:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 16:18:01,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:01,818 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:02,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:02,032 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:02,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:02,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1901522995, now seen corresponding path program 1 times [2020-08-22 16:18:02,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:02,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096247192] [2020-08-22 16:18:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 16:18:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:02,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096247192] [2020-08-22 16:18:02,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644460303] [2020-08-22 16:18:02,180 INFO L95 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 [2020-08-22 16:18:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2020-08-22 16:18:02,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:02,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:02,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-08-22 16:18:02,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198706745] [2020-08-22 16:18:02,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:18:02,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:02,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:18:02,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:18:02,321 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2020-08-22 16:18:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:02,440 INFO L93 Difference]: Finished difference Result 89 states and 121 transitions. [2020-08-22 16:18:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:18:02,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-08-22 16:18:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:02,445 INFO L225 Difference]: With dead ends: 89 [2020-08-22 16:18:02,445 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 16:18:02,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:18:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 16:18:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-08-22 16:18:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 16:18:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2020-08-22 16:18:02,461 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 50 [2020-08-22 16:18:02,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:02,461 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2020-08-22 16:18:02,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:18:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2020-08-22 16:18:02,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 16:18:02,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:02,464 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:02,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:02,678 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:02,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1643357557, now seen corresponding path program 1 times [2020-08-22 16:18:02,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:02,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176399979] [2020-08-22 16:18:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 16:18:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:02,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176399979] [2020-08-22 16:18:02,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780163772] [2020-08-22 16:18:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:18:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2020-08-22 16:18:02,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:02,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:02,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2020-08-22 16:18:02,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814595444] [2020-08-22 16:18:02,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:18:02,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:02,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:18:02,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:18:02,925 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand 9 states. [2020-08-22 16:18:03,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:03,277 INFO L93 Difference]: Finished difference Result 168 states and 236 transitions. [2020-08-22 16:18:03,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:18:03,278 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-08-22 16:18:03,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:03,281 INFO L225 Difference]: With dead ends: 168 [2020-08-22 16:18:03,281 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 16:18:03,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:18:03,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 16:18:03,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 97. [2020-08-22 16:18:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 16:18:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2020-08-22 16:18:03,321 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 50 [2020-08-22 16:18:03,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:03,326 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2020-08-22 16:18:03,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:18:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2020-08-22 16:18:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 16:18:03,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:03,332 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:03,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:03,543 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:03,544 INFO L82 PathProgramCache]: Analyzing trace with hash -88495188, now seen corresponding path program 1 times [2020-08-22 16:18:03,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:03,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342092089] [2020-08-22 16:18:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 16:18:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:18:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 16:18:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:03,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342092089] [2020-08-22 16:18:03,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427631129] [2020-08-22 16:18:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:18:03,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:03,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:03,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-08-22 16:18:03,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334676991] [2020-08-22 16:18:03,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:18:03,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:03,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:18:03,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:18:03,732 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand 4 states. [2020-08-22 16:18:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:03,789 INFO L93 Difference]: Finished difference Result 189 states and 258 transitions. [2020-08-22 16:18:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:18:03,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-08-22 16:18:03,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:03,791 INFO L225 Difference]: With dead ends: 189 [2020-08-22 16:18:03,791 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 16:18:03,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:18:03,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 16:18:03,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-08-22 16:18:03,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 16:18:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2020-08-22 16:18:03,809 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 55 [2020-08-22 16:18:03,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:03,809 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2020-08-22 16:18:03,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:18:03,810 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2020-08-22 16:18:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 16:18:03,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:03,812 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:04,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:04,025 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:04,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:04,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1588904245, now seen corresponding path program 1 times [2020-08-22 16:18:04,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:04,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062922803] [2020-08-22 16:18:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 16:18:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 16:18:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 16:18:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:04,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062922803] [2020-08-22 16:18:04,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372290533] [2020-08-22 16:18:04,131 INFO L95 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 [2020-08-22 16:18:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:18:04,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:04,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:04,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-08-22 16:18:04,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955265827] [2020-08-22 16:18:04,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:18:04,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:04,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:18:04,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:18:04,223 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand 5 states. [2020-08-22 16:18:04,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:04,340 INFO L93 Difference]: Finished difference Result 215 states and 300 transitions. [2020-08-22 16:18:04,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:18:04,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-08-22 16:18:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:04,343 INFO L225 Difference]: With dead ends: 215 [2020-08-22 16:18:04,343 INFO L226 Difference]: Without dead ends: 126 [2020-08-22 16:18:04,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:18:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-22 16:18:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2020-08-22 16:18:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-22 16:18:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 150 transitions. [2020-08-22 16:18:04,364 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 150 transitions. Word has length 57 [2020-08-22 16:18:04,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:04,367 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 150 transitions. [2020-08-22 16:18:04,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:18:04,368 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 150 transitions. [2020-08-22 16:18:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 16:18:04,374 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:04,375 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:04,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:04,581 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:04,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:04,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1775343747, now seen corresponding path program 1 times [2020-08-22 16:18:04,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:04,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809796762] [2020-08-22 16:18:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 16:18:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 16:18:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 16:18:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:04,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809796762] [2020-08-22 16:18:04,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997197918] [2020-08-22 16:18:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:18:04,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:04,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:04,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-08-22 16:18:04,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621161874] [2020-08-22 16:18:04,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:18:04,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:04,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:18:04,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:18:04,793 INFO L87 Difference]: Start difference. First operand 109 states and 150 transitions. Second operand 8 states. [2020-08-22 16:18:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:04,910 INFO L93 Difference]: Finished difference Result 219 states and 308 transitions. [2020-08-22 16:18:04,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:18:04,911 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-22 16:18:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:04,912 INFO L225 Difference]: With dead ends: 219 [2020-08-22 16:18:04,913 INFO L226 Difference]: Without dead ends: 126 [2020-08-22 16:18:04,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:18:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-22 16:18:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2020-08-22 16:18:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-08-22 16:18:04,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 160 transitions. [2020-08-22 16:18:04,928 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 160 transitions. Word has length 58 [2020-08-22 16:18:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:04,928 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 160 transitions. [2020-08-22 16:18:04,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:18:04,928 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 160 transitions. [2020-08-22 16:18:04,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 16:18:04,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:04,930 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:05,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:05,144 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:05,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:05,145 INFO L82 PathProgramCache]: Analyzing trace with hash 847268444, now seen corresponding path program 1 times [2020-08-22 16:18:05,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:05,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433083548] [2020-08-22 16:18:05,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 16:18:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 16:18:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 16:18:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:05,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433083548] [2020-08-22 16:18:05,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289950187] [2020-08-22 16:18:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:18:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2020-08-22 16:18:05,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:05,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:05,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-08-22 16:18:05,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637651069] [2020-08-22 16:18:05,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:18:05,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:05,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:18:05,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:18:05,374 INFO L87 Difference]: Start difference. First operand 116 states and 160 transitions. Second operand 10 states. [2020-08-22 16:18:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:05,647 INFO L93 Difference]: Finished difference Result 238 states and 334 transitions. [2020-08-22 16:18:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:18:05,648 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-08-22 16:18:05,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:05,652 INFO L225 Difference]: With dead ends: 238 [2020-08-22 16:18:05,652 INFO L226 Difference]: Without dead ends: 139 [2020-08-22 16:18:05,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:18:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-22 16:18:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2020-08-22 16:18:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-22 16:18:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 163 transitions. [2020-08-22 16:18:05,678 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 163 transitions. Word has length 60 [2020-08-22 16:18:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:05,678 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 163 transitions. [2020-08-22 16:18:05,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:18:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 163 transitions. [2020-08-22 16:18:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 16:18:05,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:05,681 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:05,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-08-22 16:18:05,895 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash 731565580, now seen corresponding path program 2 times [2020-08-22 16:18:05,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:05,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458735844] [2020-08-22 16:18:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 16:18:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 16:18:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 16:18:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:05,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458735844] [2020-08-22 16:18:05,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237345844] [2020-08-22 16:18:05,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-08-22 16:18:06,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:18:06,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:06,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:18:06,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-08-22 16:18:06,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:06,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-08-22 16:18:06,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568998852] [2020-08-22 16:18:06,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:18:06,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:06,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:18:06,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:18:06,054 INFO L87 Difference]: Start difference. First operand 118 states and 163 transitions. Second operand 6 states. [2020-08-22 16:18:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:06,090 INFO L93 Difference]: Finished difference Result 124 states and 168 transitions. [2020-08-22 16:18:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:18:06,091 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-22 16:18:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:06,092 INFO L225 Difference]: With dead ends: 124 [2020-08-22 16:18:06,092 INFO L226 Difference]: Without dead ends: 118 [2020-08-22 16:18:06,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:18:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-22 16:18:06,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-08-22 16:18:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-22 16:18:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 162 transitions. [2020-08-22 16:18:06,104 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 162 transitions. Word has length 61 [2020-08-22 16:18:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:06,104 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 162 transitions. [2020-08-22 16:18:06,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:18:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 162 transitions. [2020-08-22 16:18:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 16:18:06,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:06,106 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:06,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:06,321 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:06,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:06,321 INFO L82 PathProgramCache]: Analyzing trace with hash 674307278, now seen corresponding path program 1 times [2020-08-22 16:18:06,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:06,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692830565] [2020-08-22 16:18:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 16:18:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 16:18:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 16:18:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:06,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692830565] [2020-08-22 16:18:06,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552735192] [2020-08-22 16:18:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:18:06,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:06,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:06,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-08-22 16:18:06,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537973726] [2020-08-22 16:18:06,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:18:06,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:06,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:18:06,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:18:06,502 INFO L87 Difference]: Start difference. First operand 118 states and 162 transitions. Second operand 10 states. [2020-08-22 16:18:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:06,642 INFO L93 Difference]: Finished difference Result 238 states and 334 transitions. [2020-08-22 16:18:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:18:06,643 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-08-22 16:18:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:06,644 INFO L225 Difference]: With dead ends: 238 [2020-08-22 16:18:06,644 INFO L226 Difference]: Without dead ends: 139 [2020-08-22 16:18:06,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:18:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-22 16:18:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 122. [2020-08-22 16:18:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-22 16:18:06,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 167 transitions. [2020-08-22 16:18:06,661 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 167 transitions. Word has length 61 [2020-08-22 16:18:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:06,662 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 167 transitions. [2020-08-22 16:18:06,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:18:06,662 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 167 transitions. [2020-08-22 16:18:06,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 16:18:06,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:06,664 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:06,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:06,878 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:06,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:06,879 INFO L82 PathProgramCache]: Analyzing trace with hash 453220333, now seen corresponding path program 1 times [2020-08-22 16:18:06,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:06,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020054093] [2020-08-22 16:18:06,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 16:18:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:18:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 16:18:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:07,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020054093] [2020-08-22 16:18:07,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171629559] [2020-08-22 16:18:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:18:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2020-08-22 16:18:07,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:07,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:07,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-08-22 16:18:07,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979909106] [2020-08-22 16:18:07,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:18:07,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:07,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:18:07,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:18:07,184 INFO L87 Difference]: Start difference. First operand 122 states and 167 transitions. Second operand 12 states. [2020-08-22 16:18:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:07,517 INFO L93 Difference]: Finished difference Result 251 states and 351 transitions. [2020-08-22 16:18:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:18:07,518 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-08-22 16:18:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:07,520 INFO L225 Difference]: With dead ends: 251 [2020-08-22 16:18:07,520 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 16:18:07,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:18:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 16:18:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 124. [2020-08-22 16:18:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-22 16:18:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2020-08-22 16:18:07,532 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 63 [2020-08-22 16:18:07,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:07,533 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2020-08-22 16:18:07,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:18:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2020-08-22 16:18:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 16:18:07,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:07,535 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:07,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-08-22 16:18:07,748 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:07,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1176242209, now seen corresponding path program 2 times [2020-08-22 16:18:07,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:07,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86966807] [2020-08-22 16:18:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 16:18:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 16:18:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 16:18:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:07,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86966807] [2020-08-22 16:18:07,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685878359] [2020-08-22 16:18:07,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-08-22 16:18:07,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:18:07,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:07,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2020-08-22 16:18:07,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-22 16:18:07,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:07,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-08-22 16:18:07,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408704768] [2020-08-22 16:18:07,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:18:07,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:07,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:18:07,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:18:07,936 INFO L87 Difference]: Start difference. First operand 124 states and 170 transitions. Second operand 6 states. [2020-08-22 16:18:07,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:07,978 INFO L93 Difference]: Finished difference Result 141 states and 188 transitions. [2020-08-22 16:18:07,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:18:07,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-08-22 16:18:07,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:07,980 INFO L225 Difference]: With dead ends: 141 [2020-08-22 16:18:07,980 INFO L226 Difference]: Without dead ends: 126 [2020-08-22 16:18:07,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:18:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-22 16:18:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-08-22 16:18:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-22 16:18:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2020-08-22 16:18:07,992 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 64 [2020-08-22 16:18:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:07,993 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2020-08-22 16:18:07,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:18:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2020-08-22 16:18:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 16:18:07,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:07,995 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:08,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:08,205 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:08,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:08,205 INFO L82 PathProgramCache]: Analyzing trace with hash 467538922, now seen corresponding path program 1 times [2020-08-22 16:18:08,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:08,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307435242] [2020-08-22 16:18:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 16:18:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 16:18:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 16:18:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:08,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307435242] [2020-08-22 16:18:08,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128130125] [2020-08-22 16:18:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:18:08,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:08,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:08,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-08-22 16:18:08,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151155676] [2020-08-22 16:18:08,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:18:08,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:08,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:18:08,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:18:08,456 INFO L87 Difference]: Start difference. First operand 125 states and 166 transitions. Second operand 12 states. [2020-08-22 16:18:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:08,610 INFO L93 Difference]: Finished difference Result 256 states and 347 transitions. [2020-08-22 16:18:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 16:18:08,611 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-08-22 16:18:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:08,612 INFO L225 Difference]: With dead ends: 256 [2020-08-22 16:18:08,612 INFO L226 Difference]: Without dead ends: 153 [2020-08-22 16:18:08,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:18:08,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-08-22 16:18:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-08-22 16:18:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-22 16:18:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 171 transitions. [2020-08-22 16:18:08,626 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 171 transitions. Word has length 66 [2020-08-22 16:18:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:08,627 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 171 transitions. [2020-08-22 16:18:08,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:18:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 171 transitions. [2020-08-22 16:18:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 16:18:08,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:08,630 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:08,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-08-22 16:18:08,844 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:08,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash 726848265, now seen corresponding path program 1 times [2020-08-22 16:18:08,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:08,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701817800] [2020-08-22 16:18:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:18:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 16:18:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 16:18:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:09,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701817800] [2020-08-22 16:18:09,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430684252] [2020-08-22 16:18:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:18:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2020-08-22 16:18:09,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:09,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:09,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-08-22 16:18:09,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791621738] [2020-08-22 16:18:09,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:18:09,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:09,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:18:09,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:18:09,132 INFO L87 Difference]: Start difference. First operand 129 states and 171 transitions. Second operand 14 states. [2020-08-22 16:18:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:09,531 INFO L93 Difference]: Finished difference Result 266 states and 358 transitions. [2020-08-22 16:18:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:18:09,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-08-22 16:18:09,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:09,534 INFO L225 Difference]: With dead ends: 266 [2020-08-22 16:18:09,534 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 16:18:09,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:18:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 16:18:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2020-08-22 16:18:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 16:18:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 174 transitions. [2020-08-22 16:18:09,547 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 174 transitions. Word has length 68 [2020-08-22 16:18:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:09,547 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 174 transitions. [2020-08-22 16:18:09,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:18:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 174 transitions. [2020-08-22 16:18:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 16:18:09,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:09,549 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:09,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:09,763 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:09,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:09,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1682015367, now seen corresponding path program 2 times [2020-08-22 16:18:09,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:09,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740757647] [2020-08-22 16:18:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 16:18:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 16:18:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 16:18:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:09,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740757647] [2020-08-22 16:18:09,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151785691] [2020-08-22 16:18:09,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-08-22 16:18:09,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:09,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:09,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:18:09,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:10,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:10,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-08-22 16:18:10,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550459833] [2020-08-22 16:18:10,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:18:10,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:18:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:18:10,062 INFO L87 Difference]: Start difference. First operand 131 states and 174 transitions. Second operand 14 states. [2020-08-22 16:18:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:10,270 INFO L93 Difference]: Finished difference Result 272 states and 370 transitions. [2020-08-22 16:18:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 16:18:10,271 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-08-22 16:18:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:10,275 INFO L225 Difference]: With dead ends: 272 [2020-08-22 16:18:10,275 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 16:18:10,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:18:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 16:18:10,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 135. [2020-08-22 16:18:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-08-22 16:18:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 179 transitions. [2020-08-22 16:18:10,296 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 179 transitions. Word has length 69 [2020-08-22 16:18:10,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:10,297 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 179 transitions. [2020-08-22 16:18:10,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:18:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 179 transitions. [2020-08-22 16:18:10,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 16:18:10,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:10,299 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:10,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-08-22 16:18:10,514 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:10,515 INFO L82 PathProgramCache]: Analyzing trace with hash 884445912, now seen corresponding path program 2 times [2020-08-22 16:18:10,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:10,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320372455] [2020-08-22 16:18:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 16:18:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 16:18:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 16:18:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:10,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320372455] [2020-08-22 16:18:10,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871958101] [2020-08-22 16:18:10,678 INFO L93 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 [2020-08-22 16:18:10,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:10,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2020-08-22 16:18:10,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:10,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:10,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-08-22 16:18:10,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729279908] [2020-08-22 16:18:10,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:18:10,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:18:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:18:10,840 INFO L87 Difference]: Start difference. First operand 135 states and 179 transitions. Second operand 16 states. [2020-08-22 16:18:11,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:11,327 INFO L93 Difference]: Finished difference Result 279 states and 376 transitions. [2020-08-22 16:18:11,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 16:18:11,328 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-08-22 16:18:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:11,330 INFO L225 Difference]: With dead ends: 279 [2020-08-22 16:18:11,330 INFO L226 Difference]: Without dead ends: 170 [2020-08-22 16:18:11,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-08-22 16:18:11,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-08-22 16:18:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2020-08-22 16:18:11,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 16:18:11,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 182 transitions. [2020-08-22 16:18:11,344 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 182 transitions. Word has length 71 [2020-08-22 16:18:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:11,345 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 182 transitions. [2020-08-22 16:18:11,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:18:11,345 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 182 transitions. [2020-08-22 16:18:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 16:18:11,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:11,346 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:11,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-08-22 16:18:11,560 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:11,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1091455606, now seen corresponding path program 3 times [2020-08-22 16:18:11,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:11,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982093596] [2020-08-22 16:18:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:18:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 16:18:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 16:18:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:11,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982093596] [2020-08-22 16:18:11,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135572938] [2020-08-22 16:18:11,662 INFO L93 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 [2020-08-22 16:18:11,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-08-22 16:18:11,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:11,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-08-22 16:18:11,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-08-22 16:18:11,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:11,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-08-22 16:18:11,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93740510] [2020-08-22 16:18:11,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 16:18:11,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:11,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 16:18:11,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:18:11,843 INFO L87 Difference]: Start difference. First operand 137 states and 182 transitions. Second operand 17 states. [2020-08-22 16:18:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:12,297 INFO L93 Difference]: Finished difference Result 328 states and 497 transitions. [2020-08-22 16:18:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 16:18:12,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-08-22 16:18:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:12,301 INFO L225 Difference]: With dead ends: 328 [2020-08-22 16:18:12,301 INFO L226 Difference]: Without dead ends: 203 [2020-08-22 16:18:12,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:18:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-08-22 16:18:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 154. [2020-08-22 16:18:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-08-22 16:18:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 213 transitions. [2020-08-22 16:18:12,317 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 213 transitions. Word has length 72 [2020-08-22 16:18:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:12,317 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 213 transitions. [2020-08-22 16:18:12,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 16:18:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 213 transitions. [2020-08-22 16:18:12,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 16:18:12,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:12,319 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:12,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-08-22 16:18:12,535 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:12,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:12,536 INFO L82 PathProgramCache]: Analyzing trace with hash 43570841, now seen corresponding path program 1 times [2020-08-22 16:18:12,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:12,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577064105] [2020-08-22 16:18:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 16:18:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 16:18:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 16:18:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:12,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577064105] [2020-08-22 16:18:12,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744866922] [2020-08-22 16:18:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjunts are in the unsatisfiable core [2020-08-22 16:18:12,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:12,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:12,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-08-22 16:18:12,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569978539] [2020-08-22 16:18:12,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 16:18:12,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:12,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 16:18:12,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:18:12,928 INFO L87 Difference]: Start difference. First operand 154 states and 213 transitions. Second operand 18 states. [2020-08-22 16:18:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:13,528 INFO L93 Difference]: Finished difference Result 310 states and 442 transitions. [2020-08-22 16:18:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:18:13,529 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2020-08-22 16:18:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:13,531 INFO L225 Difference]: With dead ends: 310 [2020-08-22 16:18:13,531 INFO L226 Difference]: Without dead ends: 190 [2020-08-22 16:18:13,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:18:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-22 16:18:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 156. [2020-08-22 16:18:13,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-22 16:18:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 216 transitions. [2020-08-22 16:18:13,546 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 216 transitions. Word has length 77 [2020-08-22 16:18:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:13,546 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 216 transitions. [2020-08-22 16:18:13,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 16:18:13,547 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 216 transitions. [2020-08-22 16:18:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 16:18:13,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:13,549 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:13,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-08-22 16:18:13,762 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:13,763 INFO L82 PathProgramCache]: Analyzing trace with hash 147496809, now seen corresponding path program 1 times [2020-08-22 16:18:13,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:13,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575470961] [2020-08-22 16:18:13,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 16:18:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 16:18:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 16:18:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:13,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575470961] [2020-08-22 16:18:13,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772475206] [2020-08-22 16:18:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 9 conjunts are in the unsatisfiable core [2020-08-22 16:18:13,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:14,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:14,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-08-22 16:18:14,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985274796] [2020-08-22 16:18:14,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 16:18:14,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:14,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 16:18:14,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:18:14,045 INFO L87 Difference]: Start difference. First operand 156 states and 216 transitions. Second operand 18 states. [2020-08-22 16:18:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:14,288 INFO L93 Difference]: Finished difference Result 322 states and 468 transitions. [2020-08-22 16:18:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 16:18:14,289 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-08-22 16:18:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:14,291 INFO L225 Difference]: With dead ends: 322 [2020-08-22 16:18:14,291 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 16:18:14,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=431, Unknown=0, NotChecked=0, Total=702 [2020-08-22 16:18:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 16:18:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2020-08-22 16:18:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-22 16:18:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 221 transitions. [2020-08-22 16:18:14,308 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 221 transitions. Word has length 78 [2020-08-22 16:18:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:14,308 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 221 transitions. [2020-08-22 16:18:14,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 16:18:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 221 transitions. [2020-08-22 16:18:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 16:18:14,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:14,310 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:14,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:14,523 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:14,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:14,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1669501014, now seen corresponding path program 2 times [2020-08-22 16:18:14,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:14,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953835102] [2020-08-22 16:18:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 16:18:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 16:18:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 16:18:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:14,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953835102] [2020-08-22 16:18:14,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104227999] [2020-08-22 16:18:14,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:14,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:14,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:14,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2020-08-22 16:18:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 25 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:14,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:14,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-08-22 16:18:14,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321549390] [2020-08-22 16:18:14,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:18:14,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:14,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:18:14,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:18:14,979 INFO L87 Difference]: Start difference. First operand 160 states and 221 transitions. Second operand 20 states. [2020-08-22 16:18:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:15,703 INFO L93 Difference]: Finished difference Result 323 states and 461 transitions. [2020-08-22 16:18:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 16:18:15,704 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-08-22 16:18:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:15,706 INFO L225 Difference]: With dead ends: 323 [2020-08-22 16:18:15,706 INFO L226 Difference]: Without dead ends: 200 [2020-08-22 16:18:15,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-08-22 16:18:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-22 16:18:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 162. [2020-08-22 16:18:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 16:18:15,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 224 transitions. [2020-08-22 16:18:15,723 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 224 transitions. Word has length 80 [2020-08-22 16:18:15,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:15,724 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 224 transitions. [2020-08-22 16:18:15,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:18:15,724 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 224 transitions. [2020-08-22 16:18:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 16:18:15,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:15,726 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:15,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:15,940 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:15,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1418123144, now seen corresponding path program 2 times [2020-08-22 16:18:15,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:15,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000805499] [2020-08-22 16:18:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:15,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:15,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:15,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 16:18:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 16:18:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 16:18:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 4 proven. 86 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:16,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000805499] [2020-08-22 16:18:16,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893424931] [2020-08-22 16:18:16,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-08-22 16:18:16,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:16,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:16,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2020-08-22 16:18:16,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:16,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:16,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-08-22 16:18:16,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392460489] [2020-08-22 16:18:16,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:18:16,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:16,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:18:16,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:18:16,282 INFO L87 Difference]: Start difference. First operand 162 states and 224 transitions. Second operand 20 states. [2020-08-22 16:18:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:16,498 INFO L93 Difference]: Finished difference Result 338 states and 493 transitions. [2020-08-22 16:18:16,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 16:18:16,498 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-08-22 16:18:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:16,500 INFO L225 Difference]: With dead ends: 338 [2020-08-22 16:18:16,500 INFO L226 Difference]: Without dead ends: 215 [2020-08-22 16:18:16,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=336, Invalid=534, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:18:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-08-22 16:18:16,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 166. [2020-08-22 16:18:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-08-22 16:18:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 229 transitions. [2020-08-22 16:18:16,515 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 229 transitions. Word has length 81 [2020-08-22 16:18:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:16,516 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 229 transitions. [2020-08-22 16:18:16,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:18:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 229 transitions. [2020-08-22 16:18:16,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 16:18:16,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:16,518 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:16,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-08-22 16:18:16,731 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:16,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:16,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1303245049, now seen corresponding path program 3 times [2020-08-22 16:18:16,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:16,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111075247] [2020-08-22 16:18:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 16:18:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 16:18:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 16:18:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 4 proven. 93 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:16,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111075247] [2020-08-22 16:18:16,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141450740] [2020-08-22 16:18:16,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:17,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-08-22 16:18:17,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:17,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2020-08-22 16:18:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-08-22 16:18:17,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:17,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-08-22 16:18:17,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18941744] [2020-08-22 16:18:17,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 16:18:17,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:17,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 16:18:17,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-08-22 16:18:17,146 INFO L87 Difference]: Start difference. First operand 166 states and 229 transitions. Second operand 19 states. [2020-08-22 16:18:18,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:18,213 INFO L93 Difference]: Finished difference Result 346 states and 500 transitions. [2020-08-22 16:18:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-22 16:18:18,215 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2020-08-22 16:18:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:18,218 INFO L225 Difference]: With dead ends: 346 [2020-08-22 16:18:18,218 INFO L226 Difference]: Without dead ends: 226 [2020-08-22 16:18:18,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 16:18:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-22 16:18:18,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 183. [2020-08-22 16:18:18,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-08-22 16:18:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 259 transitions. [2020-08-22 16:18:18,235 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 259 transitions. Word has length 83 [2020-08-22 16:18:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:18,236 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 259 transitions. [2020-08-22 16:18:18,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 16:18:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 259 transitions. [2020-08-22 16:18:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 16:18:18,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:18,238 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:18,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:18,452 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:18,452 INFO L82 PathProgramCache]: Analyzing trace with hash -737172085, now seen corresponding path program 1 times [2020-08-22 16:18:18,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:18,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842150510] [2020-08-22 16:18:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:18,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:18,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:18,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:18,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 16:18:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:18,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 16:18:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:18,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 16:18:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:18,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842150510] [2020-08-22 16:18:18,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844422620] [2020-08-22 16:18:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:18,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2020-08-22 16:18:18,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:18,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:18,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-08-22 16:18:18,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036947929] [2020-08-22 16:18:18,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 16:18:18,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:18,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 16:18:18,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:18:18,801 INFO L87 Difference]: Start difference. First operand 183 states and 259 transitions. Second operand 22 states. [2020-08-22 16:18:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:19,142 INFO L93 Difference]: Finished difference Result 390 states and 587 transitions. [2020-08-22 16:18:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 16:18:19,143 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84 [2020-08-22 16:18:19,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:19,145 INFO L225 Difference]: With dead ends: 390 [2020-08-22 16:18:19,145 INFO L226 Difference]: Without dead ends: 248 [2020-08-22 16:18:19,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 16:18:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-22 16:18:19,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 188. [2020-08-22 16:18:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-22 16:18:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 266 transitions. [2020-08-22 16:18:19,163 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 266 transitions. Word has length 84 [2020-08-22 16:18:19,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:19,163 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 266 transitions. [2020-08-22 16:18:19,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 16:18:19,163 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 266 transitions. [2020-08-22 16:18:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 16:18:19,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:19,165 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:19,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-08-22 16:18:19,378 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:19,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:19,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1124299316, now seen corresponding path program 1 times [2020-08-22 16:18:19,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:19,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784035880] [2020-08-22 16:18:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 16:18:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 16:18:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 16:18:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 4 proven. 117 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:19,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784035880] [2020-08-22 16:18:19,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490153913] [2020-08-22 16:18:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjunts are in the unsatisfiable core [2020-08-22 16:18:19,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 25 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:19,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:19,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-08-22 16:18:19,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382837227] [2020-08-22 16:18:19,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 16:18:19,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:19,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 16:18:19,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:18:19,955 INFO L87 Difference]: Start difference. First operand 188 states and 266 transitions. Second operand 24 states. [2020-08-22 16:18:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:21,192 INFO L93 Difference]: Finished difference Result 382 states and 558 transitions. [2020-08-22 16:18:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 16:18:21,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-08-22 16:18:21,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:21,194 INFO L225 Difference]: With dead ends: 382 [2020-08-22 16:18:21,195 INFO L226 Difference]: Without dead ends: 237 [2020-08-22 16:18:21,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 16:18:21,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-08-22 16:18:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 190. [2020-08-22 16:18:21,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-22 16:18:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 269 transitions. [2020-08-22 16:18:21,211 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 269 transitions. Word has length 86 [2020-08-22 16:18:21,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:21,211 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 269 transitions. [2020-08-22 16:18:21,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 16:18:21,212 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 269 transitions. [2020-08-22 16:18:21,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 16:18:21,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:21,214 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:21,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:21,427 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:21,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1955535014, now seen corresponding path program 2 times [2020-08-22 16:18:21,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:21,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707706385] [2020-08-22 16:18:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 16:18:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 16:18:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 16:18:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 4 proven. 135 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:21,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707706385] [2020-08-22 16:18:21,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592716427] [2020-08-22 16:18:21,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:21,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:18:21,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:18:21,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:21,795 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_mod_27 already exists [2020-08-22 16:18:21,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:21,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 16:18:21,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073244250] [2020-08-22 16:18:21,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:18:21,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:18:21,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-08-22 16:18:21,797 INFO L87 Difference]: Start difference. First operand 190 states and 269 transitions. Second operand 13 states. [2020-08-22 16:18:21,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:21,913 INFO L93 Difference]: Finished difference Result 385 states and 578 transitions. [2020-08-22 16:18:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 16:18:21,914 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 87 [2020-08-22 16:18:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:21,916 INFO L225 Difference]: With dead ends: 385 [2020-08-22 16:18:21,917 INFO L226 Difference]: Without dead ends: 240 [2020-08-22 16:18:21,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:18:21,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-22 16:18:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 194. [2020-08-22 16:18:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-08-22 16:18:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 274 transitions. [2020-08-22 16:18:21,945 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 274 transitions. Word has length 87 [2020-08-22 16:18:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:21,945 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 274 transitions. [2020-08-22 16:18:21,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:18:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 274 transitions. [2020-08-22 16:18:21,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 16:18:21,949 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:21,949 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:22,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-08-22 16:18:22,164 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:22,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:22,165 INFO L82 PathProgramCache]: Analyzing trace with hash 554997723, now seen corresponding path program 2 times [2020-08-22 16:18:22,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:22,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797992041] [2020-08-22 16:18:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 16:18:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 16:18:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 16:18:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:22,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797992041] [2020-08-22 16:18:22,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416814022] [2020-08-22 16:18:22,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:22,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:18:22,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:22,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:18:22,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:22,955 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_27 already exists [2020-08-22 16:18:22,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:22,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 16:18:22,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145724920] [2020-08-22 16:18:22,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:18:22,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:22,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:18:22,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:18:22,959 INFO L87 Difference]: Start difference. First operand 194 states and 274 transitions. Second operand 14 states. [2020-08-22 16:18:23,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:23,327 INFO L93 Difference]: Finished difference Result 374 states and 552 transitions. [2020-08-22 16:18:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:18:23,328 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-08-22 16:18:23,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:23,331 INFO L225 Difference]: With dead ends: 374 [2020-08-22 16:18:23,331 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 16:18:23,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:18:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 16:18:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 195. [2020-08-22 16:18:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-22 16:18:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 276 transitions. [2020-08-22 16:18:23,356 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 276 transitions. Word has length 89 [2020-08-22 16:18:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:23,357 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 276 transitions. [2020-08-22 16:18:23,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:18:23,357 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 276 transitions. [2020-08-22 16:18:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 16:18:23,361 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:23,361 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:23,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-08-22 16:18:23,565 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:23,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1436934357, now seen corresponding path program 3 times [2020-08-22 16:18:23,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:23,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167889336] [2020-08-22 16:18:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 16:18:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 16:18:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 16:18:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:23,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167889336] [2020-08-22 16:18:23,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661509190] [2020-08-22 16:18:23,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:23,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-08-22 16:18:23,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:23,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:18:23,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:24,134 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_mod_27 already exists [2020-08-22 16:18:24,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:24,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 16:18:24,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058489503] [2020-08-22 16:18:24,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:18:24,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:18:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:18:24,137 INFO L87 Difference]: Start difference. First operand 195 states and 276 transitions. Second operand 14 states. [2020-08-22 16:18:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:24,349 INFO L93 Difference]: Finished difference Result 402 states and 604 transitions. [2020-08-22 16:18:24,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:18:24,350 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 90 [2020-08-22 16:18:24,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:24,353 INFO L225 Difference]: With dead ends: 402 [2020-08-22 16:18:24,353 INFO L226 Difference]: Without dead ends: 254 [2020-08-22 16:18:24,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:18:24,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-08-22 16:18:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 200. [2020-08-22 16:18:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 16:18:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 283 transitions. [2020-08-22 16:18:24,388 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 283 transitions. Word has length 90 [2020-08-22 16:18:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:24,388 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 283 transitions. [2020-08-22 16:18:24,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:18:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 283 transitions. [2020-08-22 16:18:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 16:18:24,390 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:24,390 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:24,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-08-22 16:18:24,594 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:24,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:24,595 INFO L82 PathProgramCache]: Analyzing trace with hash 714022764, now seen corresponding path program 3 times [2020-08-22 16:18:24,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:24,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661692301] [2020-08-22 16:18:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 16:18:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 16:18:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 16:18:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 174 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:24,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661692301] [2020-08-22 16:18:24,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549912436] [2020-08-22 16:18:24,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:25,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-08-22 16:18:25,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:18:25,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:25,243 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_27 already exists [2020-08-22 16:18:25,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:25,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 16:18:25,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257969652] [2020-08-22 16:18:25,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 16:18:25,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:25,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 16:18:25,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:18:25,245 INFO L87 Difference]: Start difference. First operand 200 states and 283 transitions. Second operand 15 states. [2020-08-22 16:18:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:25,641 INFO L93 Difference]: Finished difference Result 386 states and 571 transitions. [2020-08-22 16:18:25,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:18:25,642 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 92 [2020-08-22 16:18:25,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:25,645 INFO L225 Difference]: With dead ends: 386 [2020-08-22 16:18:25,645 INFO L226 Difference]: Without dead ends: 241 [2020-08-22 16:18:25,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:18:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-22 16:18:25,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 201. [2020-08-22 16:18:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-08-22 16:18:25,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 285 transitions. [2020-08-22 16:18:25,664 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 285 transitions. Word has length 92 [2020-08-22 16:18:25,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:25,664 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 285 transitions. [2020-08-22 16:18:25,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 16:18:25,664 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 285 transitions. [2020-08-22 16:18:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 16:18:25,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:25,666 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:25,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-08-22 16:18:25,869 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:25,870 INFO L82 PathProgramCache]: Analyzing trace with hash -802125382, now seen corresponding path program 4 times [2020-08-22 16:18:25,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:25,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033970780] [2020-08-22 16:18:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:25,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:25,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:25,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:26,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 16:18:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:26,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 16:18:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:26,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 16:18:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:26,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033970780] [2020-08-22 16:18:26,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162186174] [2020-08-22 16:18:26,102 INFO L93 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:26,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:18:26,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:26,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 14 conjunts are in the unsatisfiable core [2020-08-22 16:18:26,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 25 proven. 187 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:26,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:26,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-08-22 16:18:26,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49824109] [2020-08-22 16:18:26,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 16:18:26,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:26,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 16:18:26,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=471, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:18:26,418 INFO L87 Difference]: Start difference. First operand 201 states and 285 transitions. Second operand 28 states. [2020-08-22 16:18:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:26,866 INFO L93 Difference]: Finished difference Result 446 states and 675 transitions. [2020-08-22 16:18:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 16:18:26,867 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 93 [2020-08-22 16:18:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:26,869 INFO L225 Difference]: With dead ends: 446 [2020-08-22 16:18:26,870 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 16:18:26,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=1056, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 16:18:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 16:18:26,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 206. [2020-08-22 16:18:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-22 16:18:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 292 transitions. [2020-08-22 16:18:26,893 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 292 transitions. Word has length 93 [2020-08-22 16:18:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:26,893 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 292 transitions. [2020-08-22 16:18:26,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 16:18:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 292 transitions. [2020-08-22 16:18:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-22 16:18:26,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:26,895 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:27,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-08-22 16:18:27,110 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:27,111 INFO L82 PathProgramCache]: Analyzing trace with hash 880091707, now seen corresponding path program 4 times [2020-08-22 16:18:27,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:27,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689618180] [2020-08-22 16:18:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 16:18:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 16:18:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 16:18:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 4 proven. 207 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:27,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689618180] [2020-08-22 16:18:27,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946487863] [2020-08-22 16:18:27,434 INFO L93 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:27,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:18:27,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:27,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:18:27,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 25 proven. 198 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:27,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:27,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-08-22 16:18:27,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543343912] [2020-08-22 16:18:27,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 16:18:27,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:27,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 16:18:27,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:18:27,887 INFO L87 Difference]: Start difference. First operand 206 states and 292 transitions. Second operand 30 states. [2020-08-22 16:18:29,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:29,534 INFO L93 Difference]: Finished difference Result 423 states and 619 transitions. [2020-08-22 16:18:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 16:18:29,535 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 95 [2020-08-22 16:18:29,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:29,538 INFO L225 Difference]: With dead ends: 423 [2020-08-22 16:18:29,539 INFO L226 Difference]: Without dead ends: 269 [2020-08-22 16:18:29,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=346, Invalid=1546, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 16:18:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-08-22 16:18:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 208. [2020-08-22 16:18:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-22 16:18:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 295 transitions. [2020-08-22 16:18:29,559 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 295 transitions. Word has length 95 [2020-08-22 16:18:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:29,559 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 295 transitions. [2020-08-22 16:18:29,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 16:18:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 295 transitions. [2020-08-22 16:18:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 16:18:29,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:29,561 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:29,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:29,774 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:29,774 INFO L82 PathProgramCache]: Analyzing trace with hash 51044555, now seen corresponding path program 5 times [2020-08-22 16:18:29,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:29,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267389454] [2020-08-22 16:18:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:29,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:29,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:29,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:29,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 16:18:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:29,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 16:18:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:29,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 16:18:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:29,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267389454] [2020-08-22 16:18:29,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568484804] [2020-08-22 16:18:29,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:30,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-08-22 16:18:30,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:30,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2020-08-22 16:18:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:30,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:30,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-08-22 16:18:30,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375749298] [2020-08-22 16:18:30,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 16:18:30,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:30,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 16:18:30,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=542, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:18:30,250 INFO L87 Difference]: Start difference. First operand 208 states and 295 transitions. Second operand 30 states. [2020-08-22 16:18:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:30,735 INFO L93 Difference]: Finished difference Result 462 states and 701 transitions. [2020-08-22 16:18:30,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 16:18:30,735 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 96 [2020-08-22 16:18:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:30,738 INFO L225 Difference]: With dead ends: 462 [2020-08-22 16:18:30,738 INFO L226 Difference]: Without dead ends: 308 [2020-08-22 16:18:30,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=766, Invalid=1214, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 16:18:30,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-08-22 16:18:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 212. [2020-08-22 16:18:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-22 16:18:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 300 transitions. [2020-08-22 16:18:30,769 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 300 transitions. Word has length 96 [2020-08-22 16:18:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:30,769 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 300 transitions. [2020-08-22 16:18:30,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 16:18:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 300 transitions. [2020-08-22 16:18:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 16:18:30,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:30,771 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:30,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:30,987 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:30,988 INFO L82 PathProgramCache]: Analyzing trace with hash 437647628, now seen corresponding path program 5 times [2020-08-22 16:18:30,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:30,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857043041] [2020-08-22 16:18:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 16:18:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 16:18:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 16:18:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 4 proven. 243 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:31,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857043041] [2020-08-22 16:18:31,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688008607] [2020-08-22 16:18:31,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:31,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-08-22 16:18:31,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:31,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 31 conjunts are in the unsatisfiable core [2020-08-22 16:18:31,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 25 proven. 234 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:31,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:31,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-08-22 16:18:31,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513757422] [2020-08-22 16:18:31,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 16:18:31,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:31,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 16:18:31,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:18:31,921 INFO L87 Difference]: Start difference. First operand 212 states and 300 transitions. Second operand 32 states. [2020-08-22 16:18:34,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:34,019 INFO L93 Difference]: Finished difference Result 436 states and 638 transitions. [2020-08-22 16:18:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 16:18:34,020 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 98 [2020-08-22 16:18:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:34,024 INFO L225 Difference]: With dead ends: 436 [2020-08-22 16:18:34,024 INFO L226 Difference]: Without dead ends: 279 [2020-08-22 16:18:34,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=386, Invalid=1776, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 16:18:34,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-08-22 16:18:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 214. [2020-08-22 16:18:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-22 16:18:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 303 transitions. [2020-08-22 16:18:34,051 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 303 transitions. Word has length 98 [2020-08-22 16:18:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:34,052 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 303 transitions. [2020-08-22 16:18:34,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 16:18:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 303 transitions. [2020-08-22 16:18:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-22 16:18:34,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:34,054 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:34,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-08-22 16:18:34,267 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:34,268 INFO L82 PathProgramCache]: Analyzing trace with hash -779820006, now seen corresponding path program 6 times [2020-08-22 16:18:34,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:34,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433962258] [2020-08-22 16:18:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:34,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:34,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:34,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:34,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 16:18:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:34,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 16:18:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:34,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 16:18:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 4 proven. 269 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:34,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433962258] [2020-08-22 16:18:34,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014849096] [2020-08-22 16:18:34,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:34,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-08-22 16:18:34,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:34,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:18:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:34,782 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_27 already exists [2020-08-22 16:18:34,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:34,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 16:18:34,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326894160] [2020-08-22 16:18:34,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 16:18:34,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:34,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 16:18:34,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-08-22 16:18:34,784 INFO L87 Difference]: Start difference. First operand 214 states and 303 transitions. Second operand 17 states. [2020-08-22 16:18:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:34,913 INFO L93 Difference]: Finished difference Result 445 states and 672 transitions. [2020-08-22 16:18:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 16:18:34,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 99 [2020-08-22 16:18:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:34,916 INFO L225 Difference]: With dead ends: 445 [2020-08-22 16:18:34,916 INFO L226 Difference]: Without dead ends: 288 [2020-08-22 16:18:34,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:18:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-22 16:18:34,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 218. [2020-08-22 16:18:34,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-08-22 16:18:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 308 transitions. [2020-08-22 16:18:34,941 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 308 transitions. Word has length 99 [2020-08-22 16:18:34,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:34,942 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 308 transitions. [2020-08-22 16:18:34,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 16:18:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 308 transitions. [2020-08-22 16:18:34,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 16:18:34,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:34,947 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:35,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:35,162 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:35,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:35,162 INFO L82 PathProgramCache]: Analyzing trace with hash 840721563, now seen corresponding path program 6 times [2020-08-22 16:18:35,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:35,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818020202] [2020-08-22 16:18:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 16:18:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 16:18:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 16:18:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 4 proven. 282 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:35,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818020202] [2020-08-22 16:18:35,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262937773] [2020-08-22 16:18:35,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:35,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-08-22 16:18:35,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:35,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:18:35,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:35,967 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_27 already exists [2020-08-22 16:18:35,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:35,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 16:18:35,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265878012] [2020-08-22 16:18:35,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 16:18:35,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:35,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 16:18:35,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:18:35,971 INFO L87 Difference]: Start difference. First operand 218 states and 308 transitions. Second operand 18 states. [2020-08-22 16:18:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:36,606 INFO L93 Difference]: Finished difference Result 422 states and 626 transitions. [2020-08-22 16:18:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:18:36,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-08-22 16:18:36,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:36,611 INFO L225 Difference]: With dead ends: 422 [2020-08-22 16:18:36,612 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 16:18:36,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-08-22 16:18:36,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 16:18:36,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 219. [2020-08-22 16:18:36,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-08-22 16:18:36,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 310 transitions. [2020-08-22 16:18:36,634 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 310 transitions. Word has length 101 [2020-08-22 16:18:36,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:36,634 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 310 transitions. [2020-08-22 16:18:36,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 16:18:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 310 transitions. [2020-08-22 16:18:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-22 16:18:36,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:36,636 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:36,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-08-22 16:18:36,851 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:36,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1169429909, now seen corresponding path program 7 times [2020-08-22 16:18:36,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:36,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235294354] [2020-08-22 16:18:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:36,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:36,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:36,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:37,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 16:18:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:37,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 16:18:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:37,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 16:18:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 4 proven. 310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:37,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235294354] [2020-08-22 16:18:37,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031671031] [2020-08-22 16:18:37,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:37,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 17 conjunts are in the unsatisfiable core [2020-08-22 16:18:37,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 25 proven. 301 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:37,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:37,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-08-22 16:18:37,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263061901] [2020-08-22 16:18:37,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 16:18:37,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:37,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 16:18:37,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=699, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 16:18:37,545 INFO L87 Difference]: Start difference. First operand 219 states and 310 transitions. Second operand 34 states. [2020-08-22 16:18:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:38,109 INFO L93 Difference]: Finished difference Result 498 states and 758 transitions. [2020-08-22 16:18:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 16:18:38,110 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 102 [2020-08-22 16:18:38,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:38,113 INFO L225 Difference]: With dead ends: 498 [2020-08-22 16:18:38,113 INFO L226 Difference]: Without dead ends: 338 [2020-08-22 16:18:38,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=987, Invalid=1563, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 16:18:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-08-22 16:18:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 224. [2020-08-22 16:18:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-08-22 16:18:38,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 317 transitions. [2020-08-22 16:18:38,139 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 317 transitions. Word has length 102 [2020-08-22 16:18:38,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:38,140 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 317 transitions. [2020-08-22 16:18:38,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 16:18:38,140 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 317 transitions. [2020-08-22 16:18:38,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 16:18:38,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:38,142 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:38,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:38,355 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:38,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:38,356 INFO L82 PathProgramCache]: Analyzing trace with hash 87759532, now seen corresponding path program 7 times [2020-08-22 16:18:38,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:38,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517422984] [2020-08-22 16:18:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:38,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:38,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:38,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:38,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 16:18:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:38,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 16:18:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:38,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 16:18:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:38,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517422984] [2020-08-22 16:18:38,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61166663] [2020-08-22 16:18:38,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:38,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 35 conjunts are in the unsatisfiable core [2020-08-22 16:18:38,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 25 proven. 315 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:39,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:39,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-08-22 16:18:39,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588502756] [2020-08-22 16:18:39,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 16:18:39,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:39,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 16:18:39,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 16:18:39,454 INFO L87 Difference]: Start difference. First operand 224 states and 317 transitions. Second operand 36 states. [2020-08-22 16:18:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:42,063 INFO L93 Difference]: Finished difference Result 463 states and 678 transitions. [2020-08-22 16:18:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 16:18:42,064 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 104 [2020-08-22 16:18:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:42,068 INFO L225 Difference]: With dead ends: 463 [2020-08-22 16:18:42,068 INFO L226 Difference]: Without dead ends: 300 [2020-08-22 16:18:42,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=472, Invalid=2284, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 16:18:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-08-22 16:18:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 226. [2020-08-22 16:18:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-08-22 16:18:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2020-08-22 16:18:42,090 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 104 [2020-08-22 16:18:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:42,090 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2020-08-22 16:18:42,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 16:18:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2020-08-22 16:18:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-22 16:18:42,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:42,092 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:42,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-08-22 16:18:42,306 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1258550906, now seen corresponding path program 8 times [2020-08-22 16:18:42,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:42,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473620570] [2020-08-22 16:18:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 16:18:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 16:18:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 16:18:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 4 proven. 354 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:42,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473620570] [2020-08-22 16:18:42,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386388976] [2020-08-22 16:18:42,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:42,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:18:42,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:42,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:18:42,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:42,833 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_mod_27 already exists [2020-08-22 16:18:42,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:42,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 16:18:42,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114983412] [2020-08-22 16:18:42,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 16:18:42,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:42,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 16:18:42,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-08-22 16:18:42,839 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand 19 states. [2020-08-22 16:18:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:43,059 INFO L93 Difference]: Finished difference Result 475 states and 719 transitions. [2020-08-22 16:18:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 16:18:43,060 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 105 [2020-08-22 16:18:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:43,063 INFO L225 Difference]: With dead ends: 475 [2020-08-22 16:18:43,064 INFO L226 Difference]: Without dead ends: 312 [2020-08-22 16:18:43,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:18:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-08-22 16:18:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 230. [2020-08-22 16:18:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-08-22 16:18:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 325 transitions. [2020-08-22 16:18:43,103 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 325 transitions. Word has length 105 [2020-08-22 16:18:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:43,104 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 325 transitions. [2020-08-22 16:18:43,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 16:18:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 325 transitions. [2020-08-22 16:18:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-22 16:18:43,110 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:43,111 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:43,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-08-22 16:18:43,325 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:43,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1210081019, now seen corresponding path program 8 times [2020-08-22 16:18:43,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:43,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325246669] [2020-08-22 16:18:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 16:18:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 16:18:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 16:18:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 4 proven. 369 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:43,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325246669] [2020-08-22 16:18:43,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455177057] [2020-08-22 16:18:43,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:44,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:18:44,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:44,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:18:44,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:44,350 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_27 already exists [2020-08-22 16:18:44,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:44,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 16:18:44,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54448810] [2020-08-22 16:18:44,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:18:44,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:44,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:18:44,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:18:44,352 INFO L87 Difference]: Start difference. First operand 230 states and 325 transitions. Second operand 20 states. [2020-08-22 16:18:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:45,110 INFO L93 Difference]: Finished difference Result 446 states and 663 transitions. [2020-08-22 16:18:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 16:18:45,113 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 107 [2020-08-22 16:18:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:45,115 INFO L225 Difference]: With dead ends: 446 [2020-08-22 16:18:45,115 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 16:18:45,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2020-08-22 16:18:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 16:18:45,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 231. [2020-08-22 16:18:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-22 16:18:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 327 transitions. [2020-08-22 16:18:45,141 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 327 transitions. Word has length 107 [2020-08-22 16:18:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:45,141 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 327 transitions. [2020-08-22 16:18:45,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:18:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 327 transitions. [2020-08-22 16:18:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 16:18:45,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:45,143 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:45,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-08-22 16:18:45,356 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1690778635, now seen corresponding path program 9 times [2020-08-22 16:18:45,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:45,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010871813] [2020-08-22 16:18:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:45,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:45,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:45,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:45,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 16:18:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:45,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 16:18:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:45,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 16:18:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 4 proven. 401 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:45,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010871813] [2020-08-22 16:18:45,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256019927] [2020-08-22 16:18:45,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:45,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-08-22 16:18:45,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:45,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:18:45,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:46,017 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_mod_27 already exists [2020-08-22 16:18:46,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:46,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 16:18:46,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346880483] [2020-08-22 16:18:46,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:18:46,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:46,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:18:46,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:18:46,022 INFO L87 Difference]: Start difference. First operand 231 states and 327 transitions. Second operand 20 states. [2020-08-22 16:18:46,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:46,285 INFO L93 Difference]: Finished difference Result 492 states and 745 transitions. [2020-08-22 16:18:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 16:18:46,286 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 108 [2020-08-22 16:18:46,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:46,290 INFO L225 Difference]: With dead ends: 492 [2020-08-22 16:18:46,290 INFO L226 Difference]: Without dead ends: 326 [2020-08-22 16:18:46,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2020-08-22 16:18:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-22 16:18:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 236. [2020-08-22 16:18:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 16:18:46,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 334 transitions. [2020-08-22 16:18:46,325 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 334 transitions. Word has length 108 [2020-08-22 16:18:46,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:46,326 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 334 transitions. [2020-08-22 16:18:46,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:18:46,326 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 334 transitions. [2020-08-22 16:18:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 16:18:46,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:46,353 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:46,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-08-22 16:18:46,568 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:46,568 INFO L82 PathProgramCache]: Analyzing trace with hash -30899124, now seen corresponding path program 9 times [2020-08-22 16:18:46,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:46,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867240951] [2020-08-22 16:18:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:46,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:46,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:46,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:47,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 16:18:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:47,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 16:18:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:47,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 16:18:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 4 proven. 417 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:47,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867240951] [2020-08-22 16:18:47,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317172056] [2020-08-22 16:18:47,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:47,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-08-22 16:18:47,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:47,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:18:47,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:47,559 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_27 already exists [2020-08-22 16:18:47,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:47,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 16:18:47,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192969116] [2020-08-22 16:18:47,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 16:18:47,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:47,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 16:18:47,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2020-08-22 16:18:47,561 INFO L87 Difference]: Start difference. First operand 236 states and 334 transitions. Second operand 21 states. [2020-08-22 16:18:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:48,495 INFO L93 Difference]: Finished difference Result 458 states and 682 transitions. [2020-08-22 16:18:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 16:18:48,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2020-08-22 16:18:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:48,499 INFO L225 Difference]: With dead ends: 458 [2020-08-22 16:18:48,499 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 16:18:48,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:18:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 16:18:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 237. [2020-08-22 16:18:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-22 16:18:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 336 transitions. [2020-08-22 16:18:48,522 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 336 transitions. Word has length 110 [2020-08-22 16:18:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:48,522 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 336 transitions. [2020-08-22 16:18:48,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 16:18:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 336 transitions. [2020-08-22 16:18:48,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-08-22 16:18:48,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:48,525 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:48,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-08-22 16:18:48,739 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:48,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:48,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1875099866, now seen corresponding path program 10 times [2020-08-22 16:18:48,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:48,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762887122] [2020-08-22 16:18:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:48,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:48,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:48,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:49,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 16:18:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:49,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 16:18:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:49,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 16:18:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 4 proven. 451 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:49,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762887122] [2020-08-22 16:18:49,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006609467] [2020-08-22 16:18:49,132 INFO L93 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:49,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:18:49,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:49,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 20 conjunts are in the unsatisfiable core [2020-08-22 16:18:49,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 25 proven. 442 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:49,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:49,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-08-22 16:18:49,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287273810] [2020-08-22 16:18:49,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 16:18:49,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:49,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 16:18:49,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=972, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 16:18:49,573 INFO L87 Difference]: Start difference. First operand 237 states and 336 transitions. Second operand 40 states. [2020-08-22 16:18:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:50,399 INFO L93 Difference]: Finished difference Result 554 states and 846 transitions. [2020-08-22 16:18:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 16:18:50,400 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 111 [2020-08-22 16:18:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:50,403 INFO L225 Difference]: With dead ends: 554 [2020-08-22 16:18:50,403 INFO L226 Difference]: Without dead ends: 385 [2020-08-22 16:18:50,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1371, Invalid=2169, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 16:18:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-08-22 16:18:50,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 242. [2020-08-22 16:18:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-22 16:18:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 343 transitions. [2020-08-22 16:18:50,435 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 343 transitions. Word has length 111 [2020-08-22 16:18:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:50,435 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 343 transitions. [2020-08-22 16:18:50,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 16:18:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 343 transitions. [2020-08-22 16:18:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 16:18:50,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:50,438 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:50,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:50,651 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:50,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1008144731, now seen corresponding path program 10 times [2020-08-22 16:18:50,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:50,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211253663] [2020-08-22 16:18:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:50,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:50,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:50,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:51,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 16:18:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:51,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 16:18:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:51,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 16:18:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 4 proven. 468 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:51,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211253663] [2020-08-22 16:18:51,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207869105] [2020-08-22 16:18:51,219 INFO L93 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:51,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:18:51,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:51,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 41 conjunts are in the unsatisfiable core [2020-08-22 16:18:51,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 25 proven. 459 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:52,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:52,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2020-08-22 16:18:52,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249095353] [2020-08-22 16:18:52,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 16:18:52,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:52,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 16:18:52,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 16:18:52,228 INFO L87 Difference]: Start difference. First operand 242 states and 343 transitions. Second operand 42 states. [2020-08-22 16:18:55,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:55,735 INFO L93 Difference]: Finished difference Result 504 states and 739 transitions. [2020-08-22 16:18:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 16:18:55,736 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 113 [2020-08-22 16:18:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:55,738 INFO L225 Difference]: With dead ends: 504 [2020-08-22 16:18:55,738 INFO L226 Difference]: Without dead ends: 332 [2020-08-22 16:18:55,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2020-08-22 16:18:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-08-22 16:18:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 244. [2020-08-22 16:18:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-08-22 16:18:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 346 transitions. [2020-08-22 16:18:55,763 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 346 transitions. Word has length 113 [2020-08-22 16:18:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:55,763 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 346 transitions. [2020-08-22 16:18:55,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 16:18:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 346 transitions. [2020-08-22 16:18:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-08-22 16:18:55,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:55,765 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:55,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:55,980 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:55,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:55,981 INFO L82 PathProgramCache]: Analyzing trace with hash -274278997, now seen corresponding path program 11 times [2020-08-22 16:18:55,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:55,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040696747] [2020-08-22 16:18:55,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:56,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:56,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:56,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:56,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 16:18:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:56,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 16:18:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:56,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 16:18:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 4 proven. 504 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:56,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040696747] [2020-08-22 16:18:56,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920397202] [2020-08-22 16:18:56,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:56,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-08-22 16:18:56,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:56,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2020-08-22 16:18:56,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 25 proven. 495 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:56,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:56,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2020-08-22 16:18:56,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249485387] [2020-08-22 16:18:56,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 16:18:56,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:56,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 16:18:56,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1073, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 16:18:56,860 INFO L87 Difference]: Start difference. First operand 244 states and 346 transitions. Second operand 42 states. [2020-08-22 16:18:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:57,959 INFO L93 Difference]: Finished difference Result 570 states and 872 transitions. [2020-08-22 16:18:57,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-22 16:18:57,960 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 114 [2020-08-22 16:18:57,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:57,963 INFO L225 Difference]: With dead ends: 570 [2020-08-22 16:18:57,963 INFO L226 Difference]: Without dead ends: 398 [2020-08-22 16:18:57,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1513, Invalid=2393, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 16:18:57,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-08-22 16:18:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 248. [2020-08-22 16:18:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-08-22 16:18:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 351 transitions. [2020-08-22 16:18:57,996 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 351 transitions. Word has length 114 [2020-08-22 16:18:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:57,997 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 351 transitions. [2020-08-22 16:18:57,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 16:18:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 351 transitions. [2020-08-22 16:18:57,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 16:18:57,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:57,999 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:58,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:58,214 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:58,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1334326764, now seen corresponding path program 11 times [2020-08-22 16:18:58,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:58,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984888086] [2020-08-22 16:18:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:58,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:58,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:58,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:58,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 16:18:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:58,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 16:18:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:58,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 16:18:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 4 proven. 522 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:58,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984888086] [2020-08-22 16:18:58,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313465398] [2020-08-22 16:18:58,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:58,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-08-22 16:18:58,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:58,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 43 conjunts are in the unsatisfiable core [2020-08-22 16:18:58,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 25 proven. 513 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:19:00,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:19:00,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2020-08-22 16:19:00,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925388098] [2020-08-22 16:19:00,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 16:19:00,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:00,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 16:19:00,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1710, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 16:19:00,007 INFO L87 Difference]: Start difference. First operand 248 states and 351 transitions. Second operand 44 states. [2020-08-22 16:19:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:04,123 INFO L93 Difference]: Finished difference Result 517 states and 758 transitions. [2020-08-22 16:19:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 16:19:04,124 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 116 [2020-08-22 16:19:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:04,127 INFO L225 Difference]: With dead ends: 517 [2020-08-22 16:19:04,127 INFO L226 Difference]: Without dead ends: 342 [2020-08-22 16:19:04,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=668, Invalid=3492, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 16:19:04,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-08-22 16:19:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 250. [2020-08-22 16:19:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-08-22 16:19:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 354 transitions. [2020-08-22 16:19:04,152 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 354 transitions. Word has length 116 [2020-08-22 16:19:04,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:04,153 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 354 transitions. [2020-08-22 16:19:04,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 16:19:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 354 transitions. [2020-08-22 16:19:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-08-22 16:19:04,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:04,155 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:04,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-08-22 16:19:04,368 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:04,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1247429434, now seen corresponding path program 12 times [2020-08-22 16:19:04,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:04,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373718129] [2020-08-22 16:19:04,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:04,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:04,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:04,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:04,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 16:19:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:04,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 16:19:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:04,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 16:19:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 4 proven. 560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:19:04,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373718129] [2020-08-22 16:19:04,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021754226] [2020-08-22 16:19:04,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:04,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-08-22 16:19:04,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:19:04,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:19:04,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:05,161 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_27 already exists [2020-08-22 16:19:05,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:19:05,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 16:19:05,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051441366] [2020-08-22 16:19:05,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 16:19:05,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:05,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 16:19:05,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-08-22 16:19:05,162 INFO L87 Difference]: Start difference. First operand 250 states and 354 transitions. Second operand 23 states. [2020-08-22 16:19:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:05,570 INFO L93 Difference]: Finished difference Result 535 states and 813 transitions. [2020-08-22 16:19:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 16:19:05,571 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 117 [2020-08-22 16:19:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:05,575 INFO L225 Difference]: With dead ends: 535 [2020-08-22 16:19:05,575 INFO L226 Difference]: Without dead ends: 360 [2020-08-22 16:19:05,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:19:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-08-22 16:19:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 254. [2020-08-22 16:19:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-08-22 16:19:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 359 transitions. [2020-08-22 16:19:05,605 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 359 transitions. Word has length 117 [2020-08-22 16:19:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:05,605 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 359 transitions. [2020-08-22 16:19:05,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 16:19:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 359 transitions. [2020-08-22 16:19:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-22 16:19:05,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:05,607 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:05,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-08-22 16:19:05,809 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:05,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:05,809 INFO L82 PathProgramCache]: Analyzing trace with hash -887718981, now seen corresponding path program 12 times [2020-08-22 16:19:05,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:05,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574798358] [2020-08-22 16:19:05,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:05,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:05,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:05,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:06,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 16:19:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:06,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 16:19:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:06,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 16:19:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 4 proven. 579 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:19:06,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574798358] [2020-08-22 16:19:06,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206013837] [2020-08-22 16:19:06,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:06,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-08-22 16:19:06,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:19:06,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:19:06,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:07,037 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_27 already exists [2020-08-22 16:19:07,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:19:07,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 16:19:07,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125531930] [2020-08-22 16:19:07,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 16:19:07,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:07,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 16:19:07,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:19:07,039 INFO L87 Difference]: Start difference. First operand 254 states and 359 transitions. Second operand 24 states. [2020-08-22 16:19:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:08,089 INFO L93 Difference]: Finished difference Result 494 states and 737 transitions. [2020-08-22 16:19:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 16:19:08,090 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 119 [2020-08-22 16:19:08,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:08,093 INFO L225 Difference]: With dead ends: 494 [2020-08-22 16:19:08,093 INFO L226 Difference]: Without dead ends: 322 [2020-08-22 16:19:08,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2020-08-22 16:19:08,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-08-22 16:19:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 255. [2020-08-22 16:19:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-08-22 16:19:08,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 361 transitions. [2020-08-22 16:19:08,118 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 361 transitions. Word has length 119 [2020-08-22 16:19:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:08,118 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 361 transitions. [2020-08-22 16:19:08,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 16:19:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 361 transitions. [2020-08-22 16:19:08,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-22 16:19:08,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:08,120 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:08,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-08-22 16:19:08,333 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:08,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:08,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1083488075, now seen corresponding path program 13 times [2020-08-22 16:19:08,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:08,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747916690] [2020-08-22 16:19:08,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:08,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:08,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:08,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:08,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 16:19:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:08,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 16:19:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:08,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 16:19:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 4 proven. 619 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:19:08,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747916690] [2020-08-22 16:19:08,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97541995] [2020-08-22 16:19:08,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:08,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2020-08-22 16:19:08,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 25 proven. 610 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:19:09,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:19:09,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2020-08-22 16:19:09,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822065711] [2020-08-22 16:19:09,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 16:19:09,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 16:19:09,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=1290, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 16:19:09,546 INFO L87 Difference]: Start difference. First operand 255 states and 361 transitions. Second operand 46 states. [2020-08-22 16:19:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:10,895 INFO L93 Difference]: Finished difference Result 606 states and 929 transitions. [2020-08-22 16:19:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 16:19:10,896 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 120 [2020-08-22 16:19:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:10,898 INFO L225 Difference]: With dead ends: 606 [2020-08-22 16:19:10,898 INFO L226 Difference]: Without dead ends: 428 [2020-08-22 16:19:10,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1818, Invalid=2874, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 16:19:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-08-22 16:19:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 260. [2020-08-22 16:19:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-22 16:19:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 368 transitions. [2020-08-22 16:19:10,939 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 368 transitions. Word has length 120 [2020-08-22 16:19:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:10,940 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 368 transitions. [2020-08-22 16:19:10,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 16:19:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 368 transitions. [2020-08-22 16:19:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 16:19:10,942 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:10,943 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:11,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:11,157 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:11,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:11,158 INFO L82 PathProgramCache]: Analyzing trace with hash 478424972, now seen corresponding path program 13 times [2020-08-22 16:19:11,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:11,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623349849] [2020-08-22 16:19:11,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:11,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:11,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:11,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:11,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 16:19:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:11,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 16:19:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:11,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-22 16:19:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 4 proven. 639 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:19:11,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623349849] [2020-08-22 16:19:11,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720253611] [2020-08-22 16:19:11,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:11,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 47 conjunts are in the unsatisfiable core [2020-08-22 16:19:11,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 25 proven. 630 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:19:13,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:19:13,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-08-22 16:19:13,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127014457] [2020-08-22 16:19:13,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 16:19:13,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 16:19:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2056, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 16:19:13,506 INFO L87 Difference]: Start difference. First operand 260 states and 368 transitions. Second operand 48 states. [2020-08-22 16:19:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:18,698 INFO L93 Difference]: Finished difference Result 544 states and 798 transitions. [2020-08-22 16:19:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 16:19:18,699 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 122 [2020-08-22 16:19:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:18,702 INFO L225 Difference]: With dead ends: 544 [2020-08-22 16:19:18,702 INFO L226 Difference]: Without dead ends: 363 [2020-08-22 16:19:18,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=778, Invalid=4192, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 16:19:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-08-22 16:19:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 262. [2020-08-22 16:19:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-08-22 16:19:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 371 transitions. [2020-08-22 16:19:18,730 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 371 transitions. Word has length 122 [2020-08-22 16:19:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:18,730 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 371 transitions. [2020-08-22 16:19:18,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 16:19:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 371 transitions. [2020-08-22 16:19:18,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 16:19:18,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:18,732 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:18,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-08-22 16:19:18,947 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:18,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:18,948 INFO L82 PathProgramCache]: Analyzing trace with hash 484277658, now seen corresponding path program 14 times [2020-08-22 16:19:18,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:18,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921557220] [2020-08-22 16:19:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:18,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:18,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:18,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:19,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 16:19:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:19,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 16:19:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:19,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-22 16:19:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 4 proven. 681 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:19:19,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921557220] [2020-08-22 16:19:19,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114726272] [2020-08-22 16:19:19,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:19,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:19:19,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:19:19,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:19:19,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:19,865 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_27 already exists [2020-08-22 16:19:19,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:19:19,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 16:19:19,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261685341] [2020-08-22 16:19:19,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 16:19:19,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:19,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 16:19:19,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=616, Unknown=0, NotChecked=0, Total=930 [2020-08-22 16:19:19,867 INFO L87 Difference]: Start difference. First operand 262 states and 371 transitions. Second operand 25 states. [2020-08-22 16:19:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:20,109 INFO L93 Difference]: Finished difference Result 565 states and 860 transitions. [2020-08-22 16:19:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 16:19:20,110 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 123 [2020-08-22 16:19:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:20,113 INFO L225 Difference]: With dead ends: 565 [2020-08-22 16:19:20,113 INFO L226 Difference]: Without dead ends: 384 [2020-08-22 16:19:20,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=339, Invalid=653, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:19:20,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-08-22 16:19:20,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 266. [2020-08-22 16:19:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-08-22 16:19:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 376 transitions. [2020-08-22 16:19:20,147 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 376 transitions. Word has length 123 [2020-08-22 16:19:20,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:20,147 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 376 transitions. [2020-08-22 16:19:20,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 16:19:20,147 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 376 transitions. [2020-08-22 16:19:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-22 16:19:20,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:20,151 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:20,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-08-22 16:19:20,365 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:20,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:20,366 INFO L82 PathProgramCache]: Analyzing trace with hash 162831899, now seen corresponding path program 14 times [2020-08-22 16:19:20,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:20,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341027178] [2020-08-22 16:19:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:20,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:20,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:20,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:21,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 16:19:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:21,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 16:19:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:21,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 16:19:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 4 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:19:21,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341027178] [2020-08-22 16:19:21,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806871145] [2020-08-22 16:19:21,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:21,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:19:21,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:19:21,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:19:21,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:22,137 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_27 already exists [2020-08-22 16:19:22,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:19:22,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 16:19:22,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041819595] [2020-08-22 16:19:22,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 16:19:22,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:22,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 16:19:22,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:19:22,139 INFO L87 Difference]: Start difference. First operand 266 states and 376 transitions. Second operand 26 states. [2020-08-22 16:19:23,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:23,677 INFO L93 Difference]: Finished difference Result 518 states and 774 transitions. [2020-08-22 16:19:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 16:19:23,679 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 125 [2020-08-22 16:19:23,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:23,681 INFO L225 Difference]: With dead ends: 518 [2020-08-22 16:19:23,681 INFO L226 Difference]: Without dead ends: 340 [2020-08-22 16:19:23,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 16:19:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-22 16:19:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 267. [2020-08-22 16:19:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-08-22 16:19:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 378 transitions. [2020-08-22 16:19:23,710 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 378 transitions. Word has length 125 [2020-08-22 16:19:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:23,711 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 378 transitions. [2020-08-22 16:19:23,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 16:19:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 378 transitions. [2020-08-22 16:19:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 16:19:23,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:23,712 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:23,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-08-22 16:19:23,913 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:23,914 INFO L82 PathProgramCache]: Analyzing trace with hash -709173013, now seen corresponding path program 15 times [2020-08-22 16:19:23,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:23,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683270434] [2020-08-22 16:19:23,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:23,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:23,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:23,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:24,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 16:19:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:24,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 16:19:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:24,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-22 16:19:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:19:24,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683270434] [2020-08-22 16:19:24,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817521835] [2020-08-22 16:19:24,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:24,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-08-22 16:19:24,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:19:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:19:24,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:24,955 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_27 already exists [2020-08-22 16:19:24,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:19:24,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 16:19:24,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093770297] [2020-08-22 16:19:24,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 16:19:24,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:24,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 16:19:24,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=653, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:19:24,957 INFO L87 Difference]: Start difference. First operand 267 states and 378 transitions. Second operand 26 states. [2020-08-22 16:19:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:25,332 INFO L93 Difference]: Finished difference Result 582 states and 886 transitions. [2020-08-22 16:19:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 16:19:25,333 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 126 [2020-08-22 16:19:25,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:25,336 INFO L225 Difference]: With dead ends: 582 [2020-08-22 16:19:25,336 INFO L226 Difference]: Without dead ends: 398 [2020-08-22 16:19:25,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=365, Invalid=691, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 16:19:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-08-22 16:19:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 272. [2020-08-22 16:19:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-08-22 16:19:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 385 transitions. [2020-08-22 16:19:25,360 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 385 transitions. Word has length 126 [2020-08-22 16:19:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:25,360 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 385 transitions. [2020-08-22 16:19:25,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 16:19:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 385 transitions. [2020-08-22 16:19:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 16:19:25,362 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:25,362 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:25,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-08-22 16:19:25,575 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:25,576 INFO L82 PathProgramCache]: Analyzing trace with hash 13005100, now seen corresponding path program 15 times [2020-08-22 16:19:25,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:25,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044689578] [2020-08-22 16:19:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:25,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:25,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:25,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:26,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 16:19:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:26,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 16:19:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:26,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-22 16:19:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 4 proven. 768 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:19:26,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044689578] [2020-08-22 16:19:26,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910418778] [2020-08-22 16:19:26,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:26,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-08-22 16:19:26,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:19:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:19:26,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:27,257 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_mod_27 already exists [2020-08-22 16:19:27,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:19:27,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 16:19:27,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426354194] [2020-08-22 16:19:27,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 16:19:27,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:27,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 16:19:27,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 16:19:27,259 INFO L87 Difference]: Start difference. First operand 272 states and 385 transitions. Second operand 27 states. [2020-08-22 16:19:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:28,755 INFO L93 Difference]: Finished difference Result 530 states and 793 transitions. [2020-08-22 16:19:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 16:19:28,763 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 128 [2020-08-22 16:19:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:28,766 INFO L225 Difference]: With dead ends: 530 [2020-08-22 16:19:28,766 INFO L226 Difference]: Without dead ends: 349 [2020-08-22 16:19:28,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 16:19:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-22 16:19:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 273. [2020-08-22 16:19:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-08-22 16:19:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 387 transitions. [2020-08-22 16:19:28,793 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 387 transitions. Word has length 128 [2020-08-22 16:19:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:28,793 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 387 transitions. [2020-08-22 16:19:28,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 16:19:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 387 transitions. [2020-08-22 16:19:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-08-22 16:19:28,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:28,795 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:29,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:29,008 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:29,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1058836486, now seen corresponding path program 16 times [2020-08-22 16:19:29,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:29,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951493335] [2020-08-22 16:19:29,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:29,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:29,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:29,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:29,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 16:19:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:29,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 16:19:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:29,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 16:19:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 4 proven. 814 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:19:29,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951493335] [2020-08-22 16:19:29,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607584945] [2020-08-22 16:19:29,591 INFO L93 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:29,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:19:29,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:19:29,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 26 conjunts are in the unsatisfiable core [2020-08-22 16:19:29,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 25 proven. 805 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:19:30,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:19:30,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2020-08-22 16:19:30,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133397782] [2020-08-22 16:19:30,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 16:19:30,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:30,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 16:19:30,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=1653, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 16:19:30,356 INFO L87 Difference]: Start difference. First operand 273 states and 387 transitions. Second operand 52 states. [2020-08-22 16:19:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:31,953 INFO L93 Difference]: Finished difference Result 662 states and 1017 transitions. [2020-08-22 16:19:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-22 16:19:31,953 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 129 [2020-08-22 16:19:31,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:31,956 INFO L225 Difference]: With dead ends: 662 [2020-08-22 16:19:31,956 INFO L226 Difference]: Without dead ends: 475 [2020-08-22 16:19:31,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1811 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2328, Invalid=3678, Unknown=0, NotChecked=0, Total=6006 [2020-08-22 16:19:31,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-08-22 16:19:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 278. [2020-08-22 16:19:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-08-22 16:19:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2020-08-22 16:19:31,988 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 129 [2020-08-22 16:19:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:31,988 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2020-08-22 16:19:31,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 16:19:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2020-08-22 16:19:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 16:19:31,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:31,990 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:32,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-08-22 16:19:32,205 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:32,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1006143365, now seen corresponding path program 16 times [2020-08-22 16:19:32,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:32,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845642970] [2020-08-22 16:19:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:32,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:32,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:32,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:32,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 16:19:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:32,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 16:19:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:32,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 16:19:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-08-22 16:19:32,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845642970] [2020-08-22 16:19:32,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765155111] [2020-08-22 16:19:32,570 INFO L93 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:32,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:19:32,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:19:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 14 conjunts are in the unsatisfiable core [2020-08-22 16:19:32,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-22 16:19:32,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:19:32,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2020-08-22 16:19:32,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931766225] [2020-08-22 16:19:32,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 16:19:32,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:32,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 16:19:32,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:19:32,887 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 15 states. [2020-08-22 16:19:33,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:33,234 INFO L93 Difference]: Finished difference Result 299 states and 415 transitions. [2020-08-22 16:19:33,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:19:33,235 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 131 [2020-08-22 16:19:33,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:33,237 INFO L225 Difference]: With dead ends: 299 [2020-08-22 16:19:33,237 INFO L226 Difference]: Without dead ends: 277 [2020-08-22 16:19:33,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:19:33,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-22 16:19:33,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 262. [2020-08-22 16:19:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-08-22 16:19:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 360 transitions. [2020-08-22 16:19:33,260 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 360 transitions. Word has length 131 [2020-08-22 16:19:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:33,260 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 360 transitions. [2020-08-22 16:19:33,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 16:19:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 360 transitions. [2020-08-22 16:19:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-22 16:19:33,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:33,262 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:33,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-08-22 16:19:33,462 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:33,463 INFO L82 PathProgramCache]: Analyzing trace with hash -758278722, now seen corresponding path program 1 times [2020-08-22 16:19:33,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:33,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836802768] [2020-08-22 16:19:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:33,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:33,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:33,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 16:19:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:33,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 16:19:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:33,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 16:19:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:33,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 16:19:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-08-22 16:19:33,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836802768] [2020-08-22 16:19:33,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205438834] [2020-08-22 16:19:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:33,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:19:33,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-08-22 16:19:33,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:19:33,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-08-22 16:19:33,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983384176] [2020-08-22 16:19:33,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:19:33,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:33,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:19:33,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:19:33,763 INFO L87 Difference]: Start difference. First operand 262 states and 360 transitions. Second operand 4 states. [2020-08-22 16:19:33,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:33,913 INFO L93 Difference]: Finished difference Result 424 states and 593 transitions. [2020-08-22 16:19:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:19:33,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-08-22 16:19:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:33,917 INFO L225 Difference]: With dead ends: 424 [2020-08-22 16:19:33,917 INFO L226 Difference]: Without dead ends: 266 [2020-08-22 16:19:33,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:19:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-22 16:19:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 252. [2020-08-22 16:19:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-08-22 16:19:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 341 transitions. [2020-08-22 16:19:33,941 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 341 transitions. Word has length 132 [2020-08-22 16:19:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:33,941 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 341 transitions. [2020-08-22 16:19:33,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:19:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 341 transitions. [2020-08-22 16:19:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 16:19:33,942 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:33,943 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:34,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:34,156 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-08-22 16:19:34,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:34,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459851056] [2020-08-22 16:19:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:34,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:34,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:34,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:34,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 16:19:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:34,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 16:19:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:34,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 16:19:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-22 16:19:34,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459851056] [2020-08-22 16:19:34,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243124055] [2020-08-22 16:19:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:34,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 19 conjunts are in the unsatisfiable core [2020-08-22 16:19:34,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-22 16:19:34,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:19:34,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-08-22 16:19:34,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613043548] [2020-08-22 16:19:34,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:19:34,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:34,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:19:34,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:19:34,654 INFO L87 Difference]: Start difference. First operand 252 states and 341 transitions. Second operand 10 states. [2020-08-22 16:19:34,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:34,957 INFO L93 Difference]: Finished difference Result 280 states and 374 transitions. [2020-08-22 16:19:34,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:19:34,959 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-22 16:19:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:34,961 INFO L225 Difference]: With dead ends: 280 [2020-08-22 16:19:34,962 INFO L226 Difference]: Without dead ends: 270 [2020-08-22 16:19:34,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:19:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-08-22 16:19:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 261. [2020-08-22 16:19:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-08-22 16:19:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 355 transitions. [2020-08-22 16:19:34,987 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 355 transitions. Word has length 135 [2020-08-22 16:19:34,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:34,987 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 355 transitions. [2020-08-22 16:19:34,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:19:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 355 transitions. [2020-08-22 16:19:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 16:19:34,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:34,989 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:35,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-08-22 16:19:35,190 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:35,190 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-08-22 16:19:35,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:35,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403565164] [2020-08-22 16:19:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:35,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:35,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:35,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:35,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 16:19:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:35,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 16:19:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:35,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 16:19:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 16:19:35,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403565164] [2020-08-22 16:19:35,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947173284] [2020-08-22 16:19:35,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:35,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 28 conjunts are in the unsatisfiable core [2020-08-22 16:19:35,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:36,053 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_mod_26 already exists [2020-08-22 16:19:36,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:19:36,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 16:19:36,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036773612] [2020-08-22 16:19:36,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:19:36,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:36,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:19:36,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:19:36,054 INFO L87 Difference]: Start difference. First operand 261 states and 355 transitions. Second operand 13 states. [2020-08-22 16:19:38,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:38,527 INFO L93 Difference]: Finished difference Result 282 states and 376 transitions. [2020-08-22 16:19:38,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:19:38,528 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-08-22 16:19:38,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:38,531 INFO L225 Difference]: With dead ends: 282 [2020-08-22 16:19:38,531 INFO L226 Difference]: Without dead ends: 267 [2020-08-22 16:19:38,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 130 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:19:38,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-08-22 16:19:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 261. [2020-08-22 16:19:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-08-22 16:19:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 354 transitions. [2020-08-22 16:19:38,554 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 354 transitions. Word has length 135 [2020-08-22 16:19:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:38,555 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 354 transitions. [2020-08-22 16:19:38,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:19:38,555 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 354 transitions. [2020-08-22 16:19:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 16:19:38,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:38,556 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:38,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:38,771 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:38,772 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-08-22 16:19:38,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:38,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277763023] [2020-08-22 16:19:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:38,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:38,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:38,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:19:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:38,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 16:19:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:38,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 16:19:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:38,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 16:19:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-08-22 16:19:39,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277763023] [2020-08-22 16:19:39,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486644449] [2020-08-22 16:19:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 16 conjunts are in the unsatisfiable core [2020-08-22 16:19:39,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-08-22 16:19:39,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:19:39,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-08-22 16:19:39,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049710414] [2020-08-22 16:19:39,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:19:39,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:39,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:19:39,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:19:39,580 INFO L87 Difference]: Start difference. First operand 261 states and 354 transitions. Second operand 10 states. [2020-08-22 16:19:39,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:39,924 INFO L93 Difference]: Finished difference Result 274 states and 366 transitions. [2020-08-22 16:19:39,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 16:19:39,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-22 16:19:39,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:39,929 INFO L225 Difference]: With dead ends: 274 [2020-08-22 16:19:39,929 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 16:19:39,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:19:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 16:19:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 221. [2020-08-22 16:19:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-08-22 16:19:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 297 transitions. [2020-08-22 16:19:39,944 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 297 transitions. Word has length 135 [2020-08-22 16:19:39,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:39,945 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 297 transitions. [2020-08-22 16:19:39,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:19:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 297 transitions. [2020-08-22 16:19:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-22 16:19:39,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:39,946 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 30, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:40,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-08-22 16:19:40,151 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:40,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:40,151 INFO L82 PathProgramCache]: Analyzing trace with hash -833107492, now seen corresponding path program 3 times [2020-08-22 16:19:40,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:40,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465639104] [2020-08-22 16:19:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:40,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:40,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:19:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:40,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 16:19:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:40,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-22 16:19:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:40,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-22 16:19:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:40,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2020-08-22 16:19:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 0 proven. 591 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2020-08-22 16:19:40,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465639104] [2020-08-22 16:19:40,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114316956] [2020-08-22 16:19:40,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:19:40,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-08-22 16:19:40,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:19:40,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:19:40,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:19:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 594 proven. 0 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2020-08-22 16:19:40,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:19:40,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-08-22 16:19:40,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522891073] [2020-08-22 16:19:40,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:19:40,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:40,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:19:40,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:19:40,404 INFO L87 Difference]: Start difference. First operand 221 states and 297 transitions. Second operand 4 states. [2020-08-22 16:19:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:40,525 INFO L93 Difference]: Finished difference Result 238 states and 315 transitions. [2020-08-22 16:19:40,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:19:40,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-08-22 16:19:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:40,527 INFO L225 Difference]: With dead ends: 238 [2020-08-22 16:19:40,527 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:19:40,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:19:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:19:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:19:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:19:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:19:40,529 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 154 [2020-08-22 16:19:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:40,529 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:19:40,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:19:40,530 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:19:40,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:19:40,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-08-22 16:19:40,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:19:43,178 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 462 DAG size of output: 85 [2020-08-22 16:19:52,155 WARN L193 SmtUtils]: Spent 8.97 s on a formula simplification. DAG size of input: 840 DAG size of output: 106 [2020-08-22 16:19:52,583 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 64 [2020-08-22 16:19:57,983 WARN L193 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 698 DAG size of output: 99 [2020-08-22 16:19:59,921 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 492 DAG size of output: 85 [2020-08-22 16:20:00,421 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 64 [2020-08-22 16:20:06,534 WARN L193 SmtUtils]: Spent 6.11 s on a formula simplification. DAG size of input: 732 DAG size of output: 106 [2020-08-22 16:20:14,116 WARN L193 SmtUtils]: Spent 7.57 s on a formula simplification. DAG size of input: 768 DAG size of output: 106 [2020-08-22 16:20:14,757 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 71 [2020-08-22 16:20:16,060 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 434 DAG size of output: 78 [2020-08-22 16:20:16,168 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 57 [2020-08-22 16:20:16,509 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 57 [2020-08-22 16:20:17,422 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 78 [2020-08-22 16:20:18,104 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 64 [2020-08-22 16:20:20,697 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 546 DAG size of output: 85 [2020-08-22 16:20:21,222 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 71 [2020-08-22 16:20:22,539 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 412 DAG size of output: 78 [2020-08-22 16:20:25,206 WARN L193 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 520 DAG size of output: 85 [2020-08-22 16:20:28,581 WARN L193 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 634 DAG size of output: 99 [2020-08-22 16:20:28,781 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 57 [2020-08-22 16:20:37,063 WARN L193 SmtUtils]: Spent 8.26 s on a formula simplification. DAG size of input: 803 DAG size of output: 106 [2020-08-22 16:20:39,474 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 580 DAG size of output: 92 [2020-08-22 16:20:43,737 WARN L193 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 1002 DAG size of output: 292 [2020-08-22 16:20:44,018 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 64 [2020-08-22 16:20:51,577 WARN L193 SmtUtils]: Spent 7.56 s on a formula simplification. DAG size of input: 835 DAG size of output: 106 [2020-08-22 16:20:54,479 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 605 DAG size of output: 92 [2020-08-22 16:20:58,868 WARN L193 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 670 DAG size of output: 99 [2020-08-22 16:20:59,462 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 243 [2020-08-22 16:21:00,137 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 243 [2020-08-22 16:21:10,046 WARN L193 SmtUtils]: Spent 9.88 s on a formula simplification. DAG size of input: 755 DAG size of output: 463 [2020-08-22 16:21:11,141 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 347 DAG size of output: 283 [2020-08-22 16:21:12,095 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 283 [2020-08-22 16:22:11,552 WARN L193 SmtUtils]: Spent 59.42 s on a formula simplification. DAG size of input: 1426 DAG size of output: 847 [2020-08-22 16:22:14,450 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 566 DAG size of output: 96 [2020-08-22 16:22:15,086 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 216 [2020-08-22 16:22:17,200 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 422 DAG size of output: 367 [2020-08-22 16:22:20,270 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 566 DAG size of output: 96 [2020-08-22 16:22:22,091 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 422 DAG size of output: 367 [2020-08-22 16:22:22,317 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 77 [2020-08-22 16:22:23,814 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 448 DAG size of output: 263 [2020-08-22 16:22:26,277 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 535 DAG size of output: 96 [2020-08-22 16:22:28,124 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 391 DAG size of output: 338 [2020-08-22 16:22:30,474 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 535 DAG size of output: 96 [2020-08-22 16:22:30,821 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 77 [2020-08-22 16:22:31,281 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 216 [2020-08-22 16:23:02,519 WARN L193 SmtUtils]: Spent 31.23 s on a formula simplification. DAG size of input: 1167 DAG size of output: 707 [2020-08-22 16:23:06,522 WARN L193 SmtUtils]: Spent 4.00 s on a formula simplification. DAG size of input: 644 DAG size of output: 96 [2020-08-22 16:23:16,555 WARN L193 SmtUtils]: Spent 10.03 s on a formula simplification. DAG size of input: 815 DAG size of output: 481 [2020-08-22 16:23:19,176 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 535 DAG size of output: 315 [2020-08-22 16:23:23,060 WARN L193 SmtUtils]: Spent 3.88 s on a formula simplification. DAG size of input: 644 DAG size of output: 96 [2020-08-22 16:23:23,434 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 210 [2020-08-22 16:23:23,805 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 210 [2020-08-22 16:23:25,392 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 391 DAG size of output: 338 [2020-08-22 16:24:05,067 WARN L193 SmtUtils]: Spent 39.67 s on a formula simplification. DAG size of input: 1199 DAG size of output: 738 [2020-08-22 16:24:18,822 WARN L193 SmtUtils]: Spent 13.72 s on a formula simplification. DAG size of input: 751 DAG size of output: 680 [2020-08-22 16:24:21,809 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 593 DAG size of output: 96 [2020-08-22 16:24:24,801 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 593 DAG size of output: 96 [2020-08-22 16:25:16,370 WARN L193 SmtUtils]: Spent 51.55 s on a formula simplification. DAG size of input: 1271 DAG size of output: 778 [2020-08-22 16:25:20,925 WARN L193 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 599 DAG size of output: 362 [2020-08-22 16:25:38,735 WARN L193 SmtUtils]: Spent 17.81 s on a formula simplification. DAG size of input: 823 DAG size of output: 753 [2020-08-22 16:25:42,293 WARN L193 SmtUtils]: Spent 3.55 s on a formula simplification. DAG size of input: 620 DAG size of output: 96 [2020-08-22 16:25:58,056 WARN L193 SmtUtils]: Spent 15.76 s on a formula simplification. DAG size of input: 823 DAG size of output: 753 [2020-08-22 16:26:01,592 WARN L193 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 620 DAG size of output: 96 [2020-08-22 16:26:14,198 WARN L193 SmtUtils]: Spent 12.60 s on a formula simplification. DAG size of input: 751 DAG size of output: 680 [2020-08-22 16:26:19,870 WARN L193 SmtUtils]: Spent 5.63 s on a formula simplification. DAG size of input: 686 DAG size of output: 96 [2020-08-22 16:26:25,335 WARN L193 SmtUtils]: Spent 5.44 s on a formula simplification. DAG size of input: 686 DAG size of output: 96 [2020-08-22 16:26:27,232 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 470 DAG size of output: 96 [2020-08-22 16:26:29,095 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 470 DAG size of output: 96 [2020-08-22 16:26:29,776 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 232 [2020-08-22 16:26:47,511 WARN L193 SmtUtils]: Spent 17.70 s on a formula simplification. DAG size of input: 791 DAG size of output: 732 [2020-08-22 16:26:48,027 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 222 [2020-08-22 16:26:48,544 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 222 [2020-08-22 16:26:53,995 WARN L193 SmtUtils]: Spent 5.45 s on a formula simplification. DAG size of input: 869 DAG size of output: 79 [2020-08-22 16:26:54,539 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 232 [2020-08-22 16:27:12,122 WARN L193 SmtUtils]: Spent 17.58 s on a formula simplification. DAG size of input: 791 DAG size of output: 732 [2020-08-22 16:27:13,051 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 261 [2020-08-22 16:27:21,541 WARN L193 SmtUtils]: Spent 8.49 s on a formula simplification. DAG size of input: 729 DAG size of output: 440 [2020-08-22 16:27:22,512 WARN L193 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 261 [2020-08-22 16:27:24,624 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 504 DAG size of output: 96 [2020-08-22 16:27:24,960 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 150 [2020-08-22 16:27:27,149 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 504 DAG size of output: 96 [2020-08-22 16:27:27,437 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 135 [2020-08-22 16:27:34,233 WARN L193 SmtUtils]: Spent 6.79 s on a formula simplification. DAG size of input: 718 DAG size of output: 611 [2020-08-22 16:27:41,498 WARN L193 SmtUtils]: Spent 7.26 s on a formula simplification. DAG size of input: 718 DAG size of output: 611 [2020-08-22 16:27:54,257 WARN L193 SmtUtils]: Spent 12.72 s on a formula simplification. DAG size of input: 746 DAG size of output: 680 [2020-08-22 16:28:05,969 WARN L193 SmtUtils]: Spent 11.71 s on a formula simplification. DAG size of input: 746 DAG size of output: 680 [2020-08-22 16:28:07,105 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 368 DAG size of output: 304 [2020-08-22 16:28:07,328 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 81 [2020-08-22 16:28:08,539 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 368 DAG size of output: 304 [2020-08-22 16:28:08,751 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 118 [2020-08-22 16:28:23,260 WARN L193 SmtUtils]: Spent 14.48 s on a formula simplification. DAG size of input: 786 DAG size of output: 717 [2020-08-22 16:28:36,771 WARN L193 SmtUtils]: Spent 13.51 s on a formula simplification. DAG size of input: 786 DAG size of output: 717 [2020-08-22 16:28:38,981 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 475 DAG size of output: 96 [2020-08-22 16:28:39,538 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 197 [2020-08-22 16:28:44,175 WARN L193 SmtUtils]: Spent 4.61 s on a formula simplification. DAG size of input: 866 DAG size of output: 79 [2020-08-22 16:28:49,708 WARN L193 SmtUtils]: Spent 5.52 s on a formula simplification. DAG size of input: 621 DAG size of output: 380 [2020-08-22 16:28:51,897 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 475 DAG size of output: 96 [2020-08-22 16:28:52,093 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 109 [2020-08-22 16:28:58,276 WARN L193 SmtUtils]: Spent 6.18 s on a formula simplification. DAG size of input: 649 DAG size of output: 96 [2020-08-22 16:29:00,253 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 494 DAG size of output: 282 [2020-08-22 16:29:15,555 WARN L193 SmtUtils]: Spent 15.30 s on a formula simplification. DAG size of input: 925 DAG size of output: 546 [2020-08-22 16:29:15,675 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 107 [2020-08-22 16:29:19,718 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 560 DAG size of output: 336 [2020-08-22 16:29:25,262 WARN L193 SmtUtils]: Spent 5.39 s on a formula simplification. DAG size of input: 649 DAG size of output: 96 [2020-08-22 16:29:31,687 WARN L193 SmtUtils]: Spent 6.42 s on a formula simplification. DAG size of input: 683 DAG size of output: 398 [2020-08-22 16:29:44,236 WARN L193 SmtUtils]: Spent 12.52 s on a formula simplification. DAG size of input: 872 DAG size of output: 515 [2020-08-22 16:29:45,522 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 448 DAG size of output: 96 [2020-08-22 16:29:46,807 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 448 DAG size of output: 96 [2020-08-22 16:29:46,925 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 106 [2020-08-22 16:30:09,982 WARN L193 SmtUtils]: Spent 23.03 s on a formula simplification. DAG size of input: 1035 DAG size of output: 628 [2020-08-22 16:30:12,206 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 509 DAG size of output: 96 [2020-08-22 16:30:13,057 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 218 [2020-08-22 16:30:15,332 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 509 DAG size of output: 96 [2020-08-22 16:31:01,318 WARN L193 SmtUtils]: Spent 45.98 s on a formula simplification. DAG size of input: 1341 DAG size of output: 810 [2020-08-22 16:31:17,877 WARN L193 SmtUtils]: Spent 16.55 s on a formula simplification. DAG size of input: 956 DAG size of output: 574 [2020-08-22 16:31:26,838 WARN L193 SmtUtils]: Spent 8.96 s on a formula simplification. DAG size of input: 1592 DAG size of output: 465 [2020-08-22 16:31:27,013 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 77 [2020-08-22 16:31:28,173 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 396 DAG size of output: 239 [2020-08-22 16:31:28,368 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 77