/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-05 23:38:37,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-05 23:38:37,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-05 23:38:37,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-05 23:38:37,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-05 23:38:37,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-05 23:38:37,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-05 23:38:37,304 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 [2021-05-05 23:38:37,343 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-05 23:38:37,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-05 23:38:37,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-05 23:38:37,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-05 23:38:37,347 INFO L138 SettingsManager]: * Use SBE=true [2021-05-05 23:38:37,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-05 23:38:37,347 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-05 23:38:37,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-05 23:38:37,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-05 23:38:37,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-05 23:38:37,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-05 23:38:37,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-05 23:38:37,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-05 23:38:37,349 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-05 23:38:37,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-05 23:38:37,349 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-05 23:38:37,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-05 23:38:37,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-05 23:38:37,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-05 23:38:37,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-05 23:38:37,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-05 23:38:37,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-05 23:38:37,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-05 23:38:37,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-05 23:38:37,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-05 23:38:37,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-05 23:38:37,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-05 23:38:37,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-05 23:38:37,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-05 23:38:37,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-05 23:38:37,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-05 23:38:37,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-05 23:38:37,725 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-05 23:38:37,726 INFO L275 PluginConnector]: CDTParser initialized [2021-05-05 23:38:37,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c [2021-05-05 23:38:37,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d6265dc2/20ec00ee864c4b2daca4160353b8f852/FLAGcff010815 [2021-05-05 23:38:38,225 INFO L306 CDTParser]: Found 1 translation units. [2021-05-05 23:38:38,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c [2021-05-05 23:38:38,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d6265dc2/20ec00ee864c4b2daca4160353b8f852/FLAGcff010815 [2021-05-05 23:38:38,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d6265dc2/20ec00ee864c4b2daca4160353b8f852 [2021-05-05 23:38:38,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-05 23:38:38,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-05 23:38:38,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-05 23:38:38,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-05 23:38:38,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-05 23:38:38,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.05 11:38:38" (1/1) ... [2021-05-05 23:38:38,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32fc0efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:38:38, skipping insertion in model container [2021-05-05 23:38:38,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.05 11:38:38" (1/1) ... [2021-05-05 23:38:38,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-05 23:38:38,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-05 23:38:38,387 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c[321,334] [2021-05-05 23:38:38,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-05 23:38:38,400 INFO L203 MainTranslator]: Completed pre-run [2021-05-05 23:38:38,421 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c[321,334] [2021-05-05 23:38:38,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-05 23:38:38,456 INFO L208 MainTranslator]: Completed translation [2021-05-05 23:38:38,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:38:38 WrapperNode [2021-05-05 23:38:38,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-05 23:38:38,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-05 23:38:38,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-05 23:38:38,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-05 23:38:38,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:38:38" (1/1) ... [2021-05-05 23:38:38,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:38:38" (1/1) ... [2021-05-05 23:38:38,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:38:38" (1/1) ... [2021-05-05 23:38:38,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:38:38" (1/1) ... [2021-05-05 23:38:38,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:38:38" (1/1) ... [2021-05-05 23:38:38,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:38:38" (1/1) ... [2021-05-05 23:38:38,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:38:38" (1/1) ... [2021-05-05 23:38:38,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-05 23:38:38,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-05 23:38:38,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-05 23:38:38,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-05 23:38:38,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:38:38" (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 [2021-05-05 23:38:38,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-05 23:38:38,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-05 23:38:38,576 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-05 23:38:38,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-05 23:38:38,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-05 23:38:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-05 23:38:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-05 23:38:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-05 23:38:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-05 23:38:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-05 23:38:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-05 23:38:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-05 23:38:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-05 23:38:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-05 23:38:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-05 23:38:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-05 23:38:38,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-05 23:38:38,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-05 23:38:38,865 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-05 23:38:38,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.05 11:38:38 BoogieIcfgContainer [2021-05-05 23:38:38,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-05 23:38:38,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-05 23:38:38,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-05 23:38:38,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-05 23:38:38,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.05 11:38:38" (1/3) ... [2021-05-05 23:38:38,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ca4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.05 11:38:38, skipping insertion in model container [2021-05-05 23:38:38,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:38:38" (2/3) ... [2021-05-05 23:38:38,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ca4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.05 11:38:38, skipping insertion in model container [2021-05-05 23:38:38,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.05 11:38:38" (3/3) ... [2021-05-05 23:38:38,872 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-1.c [2021-05-05 23:38:38,889 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-05 23:38:38,892 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-05 23:38:38,921 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-05 23:38:38,940 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-05 23:38:38,940 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-05 23:38:38,940 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-05 23:38:38,941 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-05 23:38:38,941 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-05 23:38:38,941 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-05 23:38:38,941 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-05 23:38:38,941 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-05 23:38:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-05 23:38:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-05 23:38:38,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:38,960 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:38,960 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:38,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2003232087, now seen corresponding path program 1 times [2021-05-05 23:38:38,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:38,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666952839] [2021-05-05 23:38:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:39,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:39,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:39,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666952839] [2021-05-05 23:38:39,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666952839] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-05 23:38:39,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-05 23:38:39,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-05 23:38:39,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43207533] [2021-05-05 23:38:39,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-05 23:38:39,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:39,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-05 23:38:39,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-05 23:38:39,255 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:39,310 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-05 23:38:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-05 23:38:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-05 23:38:39,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:39,318 INFO L225 Difference]: With dead ends: 34 [2021-05-05 23:38:39,318 INFO L226 Difference]: Without dead ends: 14 [2021-05-05 23:38:39,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-05 23:38:39,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-05 23:38:39,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-05 23:38:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-05 23:38:39,348 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-05 23:38:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:39,348 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-05 23:38:39,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-05 23:38:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-05 23:38:39,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:39,349 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:39,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-05 23:38:39,350 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:39,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:39,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1831457181, now seen corresponding path program 1 times [2021-05-05 23:38:39,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:39,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282823391] [2021-05-05 23:38:39,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:39,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:39,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:39,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282823391] [2021-05-05 23:38:39,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282823391] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-05 23:38:39,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-05 23:38:39,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-05 23:38:39,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320991277] [2021-05-05 23:38:39,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-05 23:38:39,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:39,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-05 23:38:39,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-05 23:38:39,440 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:39,482 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-05 23:38:39,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-05 23:38:39,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-05 23:38:39,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:39,483 INFO L225 Difference]: With dead ends: 22 [2021-05-05 23:38:39,483 INFO L226 Difference]: Without dead ends: 16 [2021-05-05 23:38:39,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-05 23:38:39,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-05 23:38:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-05 23:38:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:39,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-05 23:38:39,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-05 23:38:39,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:39,489 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-05 23:38:39,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:39,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-05 23:38:39,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-05 23:38:39,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:39,490 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:39,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-05 23:38:39,491 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:39,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:39,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1746962049, now seen corresponding path program 1 times [2021-05-05 23:38:39,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:39,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282025434] [2021-05-05 23:38:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:39,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:39,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:39,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282025434] [2021-05-05 23:38:39,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282025434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:39,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024314006] [2021-05-05 23:38:39,559 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 [2021-05-05 23:38:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:39,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-05 23:38:39,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:39,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:39,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:39,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024314006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:39,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:39,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-05 23:38:39,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792836652] [2021-05-05 23:38:39,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-05 23:38:39,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:39,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-05 23:38:39,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-05 23:38:39,757 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:39,811 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-05 23:38:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-05 23:38:39,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-05 23:38:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:39,812 INFO L225 Difference]: With dead ends: 24 [2021-05-05 23:38:39,812 INFO L226 Difference]: Without dead ends: 18 [2021-05-05 23:38:39,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-05 23:38:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-05 23:38:39,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-05 23:38:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-05 23:38:39,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-05 23:38:39,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:39,817 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-05 23:38:39,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-05 23:38:39,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-05 23:38:39,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:39,818 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:40,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-05 23:38:40,042 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:40,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:40,043 INFO L82 PathProgramCache]: Analyzing trace with hash -339037983, now seen corresponding path program 2 times [2021-05-05 23:38:40,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:40,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280782394] [2021-05-05 23:38:40,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:40,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:40,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:40,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280782394] [2021-05-05 23:38:40,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280782394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:40,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202400437] [2021-05-05 23:38:40,122 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 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 [2021-05-05 23:38:40,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-05 23:38:40,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:40,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-05 23:38:40,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:40,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:40,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:40,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:40,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:40,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202400437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:40,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:40,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-05 23:38:40,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311092467] [2021-05-05 23:38:40,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-05 23:38:40,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:40,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-05 23:38:40,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-05 23:38:40,239 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:40,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:40,276 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-05 23:38:40,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-05 23:38:40,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-05 23:38:40,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:40,277 INFO L225 Difference]: With dead ends: 26 [2021-05-05 23:38:40,277 INFO L226 Difference]: Without dead ends: 20 [2021-05-05 23:38:40,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-05 23:38:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-05 23:38:40,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-05 23:38:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-05 23:38:40,282 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-05 23:38:40,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:40,283 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-05 23:38:40,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:40,283 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-05 23:38:40,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-05 23:38:40,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:40,284 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:40,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:40,500 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:40,501 INFO L82 PathProgramCache]: Analyzing trace with hash -238708797, now seen corresponding path program 3 times [2021-05-05 23:38:40,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:40,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247738917] [2021-05-05 23:38:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:40,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:40,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:40,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247738917] [2021-05-05 23:38:40,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247738917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:40,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39550964] [2021-05-05 23:38:40,607 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 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 [2021-05-05 23:38:40,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-05 23:38:40,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:40,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-05 23:38:40,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:40,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:40,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:40,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:40,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:40,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:40,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:40,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39550964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:40,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:40,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-05 23:38:40,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101802843] [2021-05-05 23:38:40,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-05 23:38:40,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:40,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-05 23:38:40,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-05 23:38:40,793 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:40,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:40,842 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-05 23:38:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-05 23:38:40,843 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-05 23:38:40,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:40,844 INFO L225 Difference]: With dead ends: 28 [2021-05-05 23:38:40,844 INFO L226 Difference]: Without dead ends: 22 [2021-05-05 23:38:40,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-05 23:38:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-05 23:38:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-05 23:38:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:40,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-05 23:38:40,849 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-05 23:38:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:40,849 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-05 23:38:40,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-05 23:38:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-05 23:38:40,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:40,850 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:41,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:41,075 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:41,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:41,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1688358437, now seen corresponding path program 4 times [2021-05-05 23:38:41,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:41,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643918697] [2021-05-05 23:38:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:41,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:41,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:41,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643918697] [2021-05-05 23:38:41,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643918697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:41,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567452442] [2021-05-05 23:38:41,178 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 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 [2021-05-05 23:38:41,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-05 23:38:41,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:41,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-05 23:38:41,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:41,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:41,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567452442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:41,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:41,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-05 23:38:41,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441077576] [2021-05-05 23:38:41,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-05 23:38:41,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:41,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-05 23:38:41,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-05 23:38:41,369 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:41,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:41,410 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-05 23:38:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-05 23:38:41,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-05 23:38:41,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:41,411 INFO L225 Difference]: With dead ends: 30 [2021-05-05 23:38:41,411 INFO L226 Difference]: Without dead ends: 24 [2021-05-05 23:38:41,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-05 23:38:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-05 23:38:41,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-05 23:38:41,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:41,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-05 23:38:41,415 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-05 23:38:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:41,415 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-05 23:38:41,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-05 23:38:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-05 23:38:41,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:41,416 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:41,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:41,636 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:41,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:41,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1825901561, now seen corresponding path program 5 times [2021-05-05 23:38:41,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:41,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560292636] [2021-05-05 23:38:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:41,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:41,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:41,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560292636] [2021-05-05 23:38:41,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560292636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:41,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668177544] [2021-05-05 23:38:41,748 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 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 [2021-05-05 23:38:41,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-05 23:38:41,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:41,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-05 23:38:41,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:41,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:41,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668177544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:41,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:41,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-05 23:38:41,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485718357] [2021-05-05 23:38:41,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-05 23:38:41,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:41,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-05 23:38:41,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-05 23:38:41,880 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:41,926 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-05 23:38:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-05 23:38:41,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-05 23:38:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:41,927 INFO L225 Difference]: With dead ends: 32 [2021-05-05 23:38:41,927 INFO L226 Difference]: Without dead ends: 26 [2021-05-05 23:38:41,927 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-05 23:38:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-05 23:38:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-05 23:38:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-05 23:38:41,931 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-05 23:38:41,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:41,931 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-05 23:38:41,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-05 23:38:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-05 23:38:41,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:41,933 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:42,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-05 23:38:42,134 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:42,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:42,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1109502313, now seen corresponding path program 6 times [2021-05-05 23:38:42,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:42,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433945281] [2021-05-05 23:38:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:42,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:42,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:42,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433945281] [2021-05-05 23:38:42,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433945281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:42,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345502529] [2021-05-05 23:38:42,270 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 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 [2021-05-05 23:38:42,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-05 23:38:42,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:42,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-05 23:38:42,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:42,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:42,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345502529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:42,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:42,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-05 23:38:42,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817234422] [2021-05-05 23:38:42,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-05 23:38:42,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:42,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-05 23:38:42,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-05 23:38:42,408 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:42,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:42,459 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-05 23:38:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-05 23:38:42,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-05 23:38:42,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:42,460 INFO L225 Difference]: With dead ends: 34 [2021-05-05 23:38:42,460 INFO L226 Difference]: Without dead ends: 28 [2021-05-05 23:38:42,460 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-05 23:38:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-05 23:38:42,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-05 23:38:42,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:42,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-05 23:38:42,464 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-05 23:38:42,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:42,464 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-05 23:38:42,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:42,464 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-05 23:38:42,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-05 23:38:42,465 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:42,465 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:42,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:42,688 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:42,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:42,689 INFO L82 PathProgramCache]: Analyzing trace with hash 239111755, now seen corresponding path program 7 times [2021-05-05 23:38:42,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:42,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608236567] [2021-05-05 23:38:42,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:42,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:42,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:42,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608236567] [2021-05-05 23:38:42,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608236567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:42,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242488171] [2021-05-05 23:38:42,822 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 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 [2021-05-05 23:38:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:42,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-05 23:38:42,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:42,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:42,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242488171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:42,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:42,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-05 23:38:42,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516814574] [2021-05-05 23:38:42,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-05 23:38:42,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:42,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-05 23:38:42,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-05 23:38:42,986 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:43,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:43,045 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-05 23:38:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-05 23:38:43,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-05 23:38:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:43,046 INFO L225 Difference]: With dead ends: 36 [2021-05-05 23:38:43,047 INFO L226 Difference]: Without dead ends: 30 [2021-05-05 23:38:43,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-05 23:38:43,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-05 23:38:43,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-05 23:38:43,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-05 23:38:43,051 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-05 23:38:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:43,051 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-05 23:38:43,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-05 23:38:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-05 23:38:43,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:43,052 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:43,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:43,273 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:43,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:43,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1312408237, now seen corresponding path program 8 times [2021-05-05 23:38:43,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:43,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124235283] [2021-05-05 23:38:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:43,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:43,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:43,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124235283] [2021-05-05 23:38:43,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124235283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:43,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382916336] [2021-05-05 23:38:43,391 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 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 [2021-05-05 23:38:43,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-05 23:38:43,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-05 23:38:43,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:43,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:43,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382916336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:43,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:43,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-05 23:38:43,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222946208] [2021-05-05 23:38:43,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-05 23:38:43,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:43,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-05 23:38:43,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-05 23:38:43,537 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:43,596 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-05 23:38:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-05 23:38:43,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-05 23:38:43,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:43,598 INFO L225 Difference]: With dead ends: 38 [2021-05-05 23:38:43,598 INFO L226 Difference]: Without dead ends: 32 [2021-05-05 23:38:43,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-05 23:38:43,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-05 23:38:43,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-05 23:38:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-05 23:38:43,607 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-05 23:38:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:43,608 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-05 23:38:43,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-05 23:38:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-05 23:38:43,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:43,611 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:43,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-05 23:38:43,836 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:43,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1958176399, now seen corresponding path program 9 times [2021-05-05 23:38:43,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:43,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280905610] [2021-05-05 23:38:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:43,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:43,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:43,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280905610] [2021-05-05 23:38:43,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280905610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:43,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840048410] [2021-05-05 23:38:43,959 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 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 [2021-05-05 23:38:44,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-05 23:38:44,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:44,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-05 23:38:44,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:44,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:44,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840048410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:44,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:44,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-05 23:38:44,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901364546] [2021-05-05 23:38:44,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-05 23:38:44,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:44,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-05 23:38:44,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-05 23:38:44,153 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:44,217 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-05 23:38:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-05 23:38:44,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-05 23:38:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:44,219 INFO L225 Difference]: With dead ends: 40 [2021-05-05 23:38:44,219 INFO L226 Difference]: Without dead ends: 34 [2021-05-05 23:38:44,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-05 23:38:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-05 23:38:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-05 23:38:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-05 23:38:44,223 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-05 23:38:44,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:44,223 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-05 23:38:44,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-05 23:38:44,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-05 23:38:44,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:44,224 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:44,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:44,437 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash -228877839, now seen corresponding path program 10 times [2021-05-05 23:38:44,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:44,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090545615] [2021-05-05 23:38:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:44,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:44,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:44,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090545615] [2021-05-05 23:38:44,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090545615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:44,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346984828] [2021-05-05 23:38:44,561 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 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 [2021-05-05 23:38:44,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-05 23:38:44,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:44,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-05 23:38:44,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:44,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:44,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346984828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:44,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:44,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-05 23:38:44,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061122960] [2021-05-05 23:38:44,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-05 23:38:44,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:44,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-05 23:38:44,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-05 23:38:44,705 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:44,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:44,779 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-05 23:38:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-05 23:38:44,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-05 23:38:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:44,782 INFO L225 Difference]: With dead ends: 42 [2021-05-05 23:38:44,782 INFO L226 Difference]: Without dead ends: 36 [2021-05-05 23:38:44,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-05 23:38:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-05 23:38:44,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-05 23:38:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-05 23:38:44,810 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-05 23:38:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:44,810 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-05 23:38:44,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-05 23:38:44,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-05 23:38:44,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:44,811 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:45,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:45,012 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:45,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:45,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1748992813, now seen corresponding path program 11 times [2021-05-05 23:38:45,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:45,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195650347] [2021-05-05 23:38:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:45,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:45,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:45,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195650347] [2021-05-05 23:38:45,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195650347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:45,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157104063] [2021-05-05 23:38:45,162 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 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 [2021-05-05 23:38:45,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-05 23:38:45,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:45,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-05 23:38:45,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:45,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:45,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157104063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:45,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:45,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-05 23:38:45,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771491450] [2021-05-05 23:38:45,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-05 23:38:45,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:45,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-05 23:38:45,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-05 23:38:45,328 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:45,392 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-05 23:38:45,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-05 23:38:45,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-05 23:38:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:45,393 INFO L225 Difference]: With dead ends: 44 [2021-05-05 23:38:45,393 INFO L226 Difference]: Without dead ends: 38 [2021-05-05 23:38:45,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-05 23:38:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-05 23:38:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-05 23:38:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-05 23:38:45,397 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-05 23:38:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:45,397 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-05 23:38:45,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-05 23:38:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-05 23:38:45,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:45,398 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:45,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-05 23:38:45,620 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:45,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:45,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2004365109, now seen corresponding path program 12 times [2021-05-05 23:38:45,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:45,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405851679] [2021-05-05 23:38:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:45,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:45,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:45,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405851679] [2021-05-05 23:38:45,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405851679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:45,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156049366] [2021-05-05 23:38:45,769 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 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 [2021-05-05 23:38:45,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-05 23:38:45,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:45,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-05 23:38:45,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:45,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:45,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:46,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156049366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:46,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:46,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-05 23:38:46,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997464334] [2021-05-05 23:38:46,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-05 23:38:46,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:46,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-05 23:38:46,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-05 23:38:46,004 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:46,083 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-05 23:38:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-05 23:38:46,083 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-05 23:38:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:46,084 INFO L225 Difference]: With dead ends: 46 [2021-05-05 23:38:46,084 INFO L226 Difference]: Without dead ends: 40 [2021-05-05 23:38:46,084 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-05 23:38:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-05 23:38:46,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-05 23:38:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-05 23:38:46,088 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-05 23:38:46,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:46,088 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-05 23:38:46,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:46,088 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-05 23:38:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-05 23:38:46,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:46,089 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:46,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-05 23:38:46,306 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:46,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:46,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1208799511, now seen corresponding path program 13 times [2021-05-05 23:38:46,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:46,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589113888] [2021-05-05 23:38:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:46,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:46,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:46,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589113888] [2021-05-05 23:38:46,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589113888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:46,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027364849] [2021-05-05 23:38:46,486 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 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 [2021-05-05 23:38:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:46,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-05 23:38:46,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:46,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:46,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027364849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:46,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:46,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-05 23:38:46,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143802171] [2021-05-05 23:38:46,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-05 23:38:46,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-05 23:38:46,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-05 23:38:46,662 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:46,722 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-05 23:38:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-05 23:38:46,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-05 23:38:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:46,724 INFO L225 Difference]: With dead ends: 48 [2021-05-05 23:38:46,724 INFO L226 Difference]: Without dead ends: 42 [2021-05-05 23:38:46,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-05 23:38:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-05 23:38:46,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-05 23:38:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-05 23:38:46,737 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-05 23:38:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:46,737 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-05 23:38:46,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-05 23:38:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-05 23:38:46,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:46,742 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:46,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-05 23:38:46,957 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:46,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1174438521, now seen corresponding path program 14 times [2021-05-05 23:38:46,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:46,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868180598] [2021-05-05 23:38:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:47,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:47,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:47,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868180598] [2021-05-05 23:38:47,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868180598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:47,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700557896] [2021-05-05 23:38:47,149 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 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 [2021-05-05 23:38:47,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-05 23:38:47,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:47,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-05 23:38:47,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:47,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:47,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700557896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:47,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:47,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-05 23:38:47,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19660512] [2021-05-05 23:38:47,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-05 23:38:47,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-05 23:38:47,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-05 23:38:47,296 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:47,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:47,402 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-05 23:38:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-05 23:38:47,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-05 23:38:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:47,404 INFO L225 Difference]: With dead ends: 50 [2021-05-05 23:38:47,404 INFO L226 Difference]: Without dead ends: 44 [2021-05-05 23:38:47,404 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-05 23:38:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-05 23:38:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-05 23:38:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-05 23:38:47,410 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-05 23:38:47,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:47,411 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-05 23:38:47,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:47,412 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-05 23:38:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-05 23:38:47,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:47,413 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:47,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:47,630 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:47,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1781701797, now seen corresponding path program 15 times [2021-05-05 23:38:47,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:47,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600067455] [2021-05-05 23:38:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:47,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:47,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600067455] [2021-05-05 23:38:47,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600067455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:47,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789451555] [2021-05-05 23:38:47,842 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 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 [2021-05-05 23:38:48,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-05 23:38:48,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:48,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-05 23:38:48,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:48,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:48,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789451555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:48,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:48,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-05 23:38:48,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559793984] [2021-05-05 23:38:48,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-05 23:38:48,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:48,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-05 23:38:48,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-05 23:38:48,158 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:48,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:48,220 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-05 23:38:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-05 23:38:48,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-05 23:38:48,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:48,221 INFO L225 Difference]: With dead ends: 52 [2021-05-05 23:38:48,221 INFO L226 Difference]: Without dead ends: 46 [2021-05-05 23:38:48,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-05 23:38:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-05 23:38:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-05 23:38:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-05 23:38:48,229 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-05 23:38:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:48,229 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-05 23:38:48,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-05 23:38:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-05 23:38:48,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:48,231 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:48,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-05 23:38:48,453 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:48,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:48,454 INFO L82 PathProgramCache]: Analyzing trace with hash 635802557, now seen corresponding path program 16 times [2021-05-05 23:38:48,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:48,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008659894] [2021-05-05 23:38:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:48,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:48,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:48,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008659894] [2021-05-05 23:38:48,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008659894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:48,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638512984] [2021-05-05 23:38:48,714 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 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 [2021-05-05 23:38:48,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-05 23:38:48,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:48,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-05 23:38:48,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:48,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:48,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:49,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638512984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:49,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:49,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2021-05-05 23:38:49,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47296782] [2021-05-05 23:38:49,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-05 23:38:49,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-05 23:38:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-05 23:38:49,042 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:49,130 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-05 23:38:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-05 23:38:49,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-05 23:38:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:49,130 INFO L225 Difference]: With dead ends: 54 [2021-05-05 23:38:49,131 INFO L226 Difference]: Without dead ends: 48 [2021-05-05 23:38:49,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-05 23:38:49,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-05 23:38:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-05 23:38:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-05 23:38:49,133 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-05 23:38:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:49,133 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-05 23:38:49,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-05 23:38:49,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-05 23:38:49,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:49,134 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:49,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-05 23:38:49,349 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:49,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:49,349 INFO L82 PathProgramCache]: Analyzing trace with hash 280179615, now seen corresponding path program 17 times [2021-05-05 23:38:49,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:49,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926363128] [2021-05-05 23:38:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:49,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:49,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:49,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926363128] [2021-05-05 23:38:49,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926363128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:49,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718736532] [2021-05-05 23:38:49,562 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 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 [2021-05-05 23:38:49,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-05 23:38:49,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:49,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-05 23:38:49,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:49,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:49,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718736532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:49,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:49,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-05 23:38:49,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670733774] [2021-05-05 23:38:49,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-05 23:38:49,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:49,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-05 23:38:49,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-05 23:38:49,825 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:49,917 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-05 23:38:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-05 23:38:49,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-05 23:38:49,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:49,918 INFO L225 Difference]: With dead ends: 56 [2021-05-05 23:38:49,918 INFO L226 Difference]: Without dead ends: 50 [2021-05-05 23:38:49,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-05 23:38:49,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-05 23:38:49,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-05 23:38:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-05 23:38:49,921 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-05 23:38:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:49,921 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-05 23:38:49,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-05 23:38:49,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-05 23:38:49,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:49,921 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:50,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:50,129 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:50,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2123916033, now seen corresponding path program 18 times [2021-05-05 23:38:50,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:50,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726050972] [2021-05-05 23:38:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:50,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:50,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:50,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726050972] [2021-05-05 23:38:50,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726050972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:50,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539188605] [2021-05-05 23:38:50,394 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 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 [2021-05-05 23:38:50,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-05 23:38:50,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:50,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-05 23:38:50,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:50,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:50,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539188605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:50,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:50,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-05 23:38:50,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720828438] [2021-05-05 23:38:50,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-05 23:38:50,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:50,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-05 23:38:50,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-05 23:38:50,994 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:51,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:51,087 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-05 23:38:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-05 23:38:51,088 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-05 23:38:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:51,089 INFO L225 Difference]: With dead ends: 58 [2021-05-05 23:38:51,089 INFO L226 Difference]: Without dead ends: 52 [2021-05-05 23:38:51,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-05 23:38:51,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-05 23:38:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-05 23:38:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:51,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-05 23:38:51,092 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-05 23:38:51,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:51,092 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-05 23:38:51,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:51,093 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-05 23:38:51,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-05 23:38:51,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:51,093 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:51,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:51,293 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:51,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:51,294 INFO L82 PathProgramCache]: Analyzing trace with hash 133120483, now seen corresponding path program 19 times [2021-05-05 23:38:51,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:51,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332947123] [2021-05-05 23:38:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:51,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:51,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:51,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332947123] [2021-05-05 23:38:51,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332947123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:51,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738908384] [2021-05-05 23:38:51,534 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 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 [2021-05-05 23:38:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:51,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-05 23:38:51,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:51,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:51,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738908384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:51,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:51,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-05 23:38:51,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703812752] [2021-05-05 23:38:51,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-05 23:38:51,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:51,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-05 23:38:51,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-05 23:38:51,754 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:51,821 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-05 23:38:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-05 23:38:51,822 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-05 23:38:51,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:51,823 INFO L225 Difference]: With dead ends: 60 [2021-05-05 23:38:51,823 INFO L226 Difference]: Without dead ends: 54 [2021-05-05 23:38:51,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-05 23:38:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-05 23:38:51,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-05 23:38:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-05 23:38:51,826 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-05 23:38:51,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:51,826 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-05 23:38:51,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-05 23:38:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-05 23:38:51,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:51,827 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:52,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:52,049 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:52,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:52,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1760956347, now seen corresponding path program 20 times [2021-05-05 23:38:52,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:52,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957075948] [2021-05-05 23:38:52,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:52,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:52,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:52,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957075948] [2021-05-05 23:38:52,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957075948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:52,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679057912] [2021-05-05 23:38:52,314 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 [2021-05-05 23:38:52,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-05 23:38:52,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:52,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-05 23:38:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:52,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:52,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679057912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:52,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:52,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-05 23:38:52,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755611156] [2021-05-05 23:38:52,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-05 23:38:52,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:52,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-05 23:38:52,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-05 23:38:52,490 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:52,597 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-05 23:38:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-05 23:38:52,597 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-05 23:38:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:52,598 INFO L225 Difference]: With dead ends: 62 [2021-05-05 23:38:52,598 INFO L226 Difference]: Without dead ends: 56 [2021-05-05 23:38:52,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-05 23:38:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-05 23:38:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-05 23:38:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-05 23:38:52,602 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-05 23:38:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:52,602 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-05 23:38:52,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:52,602 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-05 23:38:52,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-05 23:38:52,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:52,602 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:52,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-05 23:38:52,828 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:52,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:52,828 INFO L82 PathProgramCache]: Analyzing trace with hash -902656473, now seen corresponding path program 21 times [2021-05-05 23:38:52,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:52,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650909211] [2021-05-05 23:38:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:53,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:53,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650909211] [2021-05-05 23:38:53,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650909211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524615417] [2021-05-05 23:38:53,154 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 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 [2021-05-05 23:38:53,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-05 23:38:53,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:53,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-05 23:38:53,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:53,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:53,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524615417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:53,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:53,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-05 23:38:53,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637436049] [2021-05-05 23:38:53,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-05 23:38:53,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:53,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-05 23:38:53,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-05 23:38:53,565 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:53,631 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-05 23:38:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-05 23:38:53,631 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-05 23:38:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:53,632 INFO L225 Difference]: With dead ends: 64 [2021-05-05 23:38:53,632 INFO L226 Difference]: Without dead ends: 58 [2021-05-05 23:38:53,632 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-05 23:38:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-05 23:38:53,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-05 23:38:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-05 23:38:53,635 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-05 23:38:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:53,636 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-05 23:38:53,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-05 23:38:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-05 23:38:53,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:53,636 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:53,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-05 23:38:53,857 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:53,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:53,857 INFO L82 PathProgramCache]: Analyzing trace with hash -710198391, now seen corresponding path program 22 times [2021-05-05 23:38:53,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:53,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100827040] [2021-05-05 23:38:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:54,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:54,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:54,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100827040] [2021-05-05 23:38:54,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100827040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:54,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402542700] [2021-05-05 23:38:54,165 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 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 [2021-05-05 23:38:54,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-05 23:38:54,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:54,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-05 23:38:54,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:54,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:54,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402542700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:54,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:54,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2021-05-05 23:38:54,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901944450] [2021-05-05 23:38:54,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-05 23:38:54,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-05 23:38:54,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-05 23:38:54,374 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:54,486 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-05 23:38:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-05 23:38:54,486 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-05 23:38:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:54,486 INFO L225 Difference]: With dead ends: 66 [2021-05-05 23:38:54,486 INFO L226 Difference]: Without dead ends: 60 [2021-05-05 23:38:54,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-05 23:38:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-05 23:38:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-05 23:38:54,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-05 23:38:54,489 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-05 23:38:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:54,489 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-05 23:38:54,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-05 23:38:54,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-05 23:38:54,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:54,490 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:54,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:54,713 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:54,713 INFO L82 PathProgramCache]: Analyzing trace with hash -441575317, now seen corresponding path program 23 times [2021-05-05 23:38:54,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:54,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227788492] [2021-05-05 23:38:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:55,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:55,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:55,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227788492] [2021-05-05 23:38:55,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227788492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:55,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127711320] [2021-05-05 23:38:55,056 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 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 [2021-05-05 23:38:55,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-05 23:38:55,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:55,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-05 23:38:55,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:55,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:55,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127711320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:55,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:55,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-05 23:38:55,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726025954] [2021-05-05 23:38:55,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-05 23:38:55,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:55,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-05 23:38:55,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-05 23:38:55,501 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:55,626 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-05 23:38:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-05 23:38:55,627 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-05 23:38:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:55,627 INFO L225 Difference]: With dead ends: 68 [2021-05-05 23:38:55,627 INFO L226 Difference]: Without dead ends: 62 [2021-05-05 23:38:55,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-05 23:38:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-05 23:38:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-05 23:38:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-05 23:38:55,629 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-05 23:38:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:55,630 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-05 23:38:55,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-05 23:38:55,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-05 23:38:55,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:55,630 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:55,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-05 23:38:55,845 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:55,845 INFO L82 PathProgramCache]: Analyzing trace with hash 7161037, now seen corresponding path program 24 times [2021-05-05 23:38:55,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:55,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30070095] [2021-05-05 23:38:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:56,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:56,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:56,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30070095] [2021-05-05 23:38:56,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30070095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:56,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071236252] [2021-05-05 23:38:56,191 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 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 [2021-05-05 23:38:58,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-05 23:38:58,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:38:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-05 23:38:58,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:58,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:58,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071236252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:58,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:58,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-05-05 23:38:58,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171137637] [2021-05-05 23:38:58,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-05 23:38:58,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:58,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-05 23:38:58,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-05 23:38:58,472 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:58,595 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-05 23:38:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-05 23:38:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-05 23:38:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:58,596 INFO L225 Difference]: With dead ends: 70 [2021-05-05 23:38:58,596 INFO L226 Difference]: Without dead ends: 64 [2021-05-05 23:38:58,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 312.0ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-05 23:38:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-05 23:38:58,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-05 23:38:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-05 23:38:58,600 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-05 23:38:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:58,600 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-05 23:38:58,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-05 23:38:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-05 23:38:58,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:58,601 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:58,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:38:58,817 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:58,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:58,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1746067631, now seen corresponding path program 25 times [2021-05-05 23:38:58,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:58,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549388757] [2021-05-05 23:38:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:59,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:38:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:59,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:38:59,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549388757] [2021-05-05 23:38:59,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549388757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:59,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945792107] [2021-05-05 23:38:59,186 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 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 [2021-05-05 23:38:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:38:59,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-05 23:38:59,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:38:59,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:38:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:38:59,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945792107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:38:59,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:38:59,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2021-05-05 23:38:59,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377637250] [2021-05-05 23:38:59,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-05 23:38:59,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:38:59,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-05 23:38:59,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-05 23:38:59,384 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:38:59,510 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-05 23:38:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-05 23:38:59,511 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-05 23:38:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:38:59,511 INFO L225 Difference]: With dead ends: 72 [2021-05-05 23:38:59,511 INFO L226 Difference]: Without dead ends: 66 [2021-05-05 23:38:59,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 323.5ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-05 23:38:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-05 23:38:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-05 23:38:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-05 23:38:59,520 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-05 23:38:59,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:38:59,520 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-05 23:38:59,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:38:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-05 23:38:59,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-05 23:38:59,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:38:59,522 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:38:59,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-05 23:38:59,746 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:38:59,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:38:59,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2093026321, now seen corresponding path program 26 times [2021-05-05 23:38:59,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:38:59,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121857955] [2021-05-05 23:38:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:38:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:00,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:00,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:00,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121857955] [2021-05-05 23:39:00,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121857955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:00,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544755397] [2021-05-05 23:39:00,167 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 [2021-05-05 23:39:00,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-05 23:39:00,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:39:00,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-05 23:39:00,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:00,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:00,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544755397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:00,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:00,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-05 23:39:00,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798791175] [2021-05-05 23:39:00,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-05 23:39:00,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:00,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-05 23:39:00,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-05 23:39:00,362 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:00,490 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-05 23:39:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-05 23:39:00,490 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-05 23:39:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:00,491 INFO L225 Difference]: With dead ends: 74 [2021-05-05 23:39:00,491 INFO L226 Difference]: Without dead ends: 68 [2021-05-05 23:39:00,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-05 23:39:00,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-05 23:39:00,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-05 23:39:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-05 23:39:00,493 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-05 23:39:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:00,494 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-05 23:39:00,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-05 23:39:00,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-05 23:39:00,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:00,494 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:00,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-05 23:39:00,701 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash 512878323, now seen corresponding path program 27 times [2021-05-05 23:39:00,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:00,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208105920] [2021-05-05 23:39:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:01,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:01,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:01,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208105920] [2021-05-05 23:39:01,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208105920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:01,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916238228] [2021-05-05 23:39:01,101 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 [2021-05-05 23:39:04,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-05 23:39:04,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:39:04,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-05 23:39:04,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:04,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:04,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916238228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:04,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:04,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-05 23:39:04,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987093904] [2021-05-05 23:39:04,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-05 23:39:04,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:04,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-05 23:39:04,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-05 23:39:04,510 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:04,616 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-05 23:39:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-05 23:39:04,616 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-05 23:39:04,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:04,617 INFO L225 Difference]: With dead ends: 76 [2021-05-05 23:39:04,617 INFO L226 Difference]: Without dead ends: 70 [2021-05-05 23:39:04,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-05 23:39:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-05 23:39:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-05 23:39:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-05 23:39:04,620 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-05 23:39:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:04,620 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-05 23:39:04,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-05 23:39:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-05 23:39:04,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:04,620 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:04,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-05 23:39:04,847 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:04,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1885892267, now seen corresponding path program 28 times [2021-05-05 23:39:04,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:04,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373098662] [2021-05-05 23:39:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:05,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:05,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:05,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373098662] [2021-05-05 23:39:05,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373098662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:05,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943888382] [2021-05-05 23:39:05,278 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 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 [2021-05-05 23:39:05,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-05 23:39:05,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:39:05,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-05 23:39:05,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:05,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:05,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943888382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:05,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:05,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2021-05-05 23:39:05,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085418779] [2021-05-05 23:39:05,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-05 23:39:05,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:05,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-05 23:39:05,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-05 23:39:05,493 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:05,604 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-05 23:39:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-05 23:39:05,604 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-05 23:39:05,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:05,605 INFO L225 Difference]: With dead ends: 78 [2021-05-05 23:39:05,605 INFO L226 Difference]: Without dead ends: 72 [2021-05-05 23:39:05,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 393.8ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-05 23:39:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-05 23:39:05,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-05 23:39:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-05 23:39:05,608 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-05 23:39:05,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:05,608 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-05 23:39:05,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-05 23:39:05,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-05 23:39:05,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:05,609 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:05,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:39:05,825 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:05,825 INFO L82 PathProgramCache]: Analyzing trace with hash -706991305, now seen corresponding path program 29 times [2021-05-05 23:39:05,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:05,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944799438] [2021-05-05 23:39:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:06,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:06,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944799438] [2021-05-05 23:39:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944799438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:06,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578099438] [2021-05-05 23:39:06,295 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 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 [2021-05-05 23:39:06,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-05 23:39:06,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:39:06,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-05 23:39:06,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:06,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:06,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578099438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:06,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:06,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-05 23:39:06,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212644290] [2021-05-05 23:39:06,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-05 23:39:06,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:06,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-05 23:39:06,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-05 23:39:06,914 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:07,060 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-05 23:39:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-05 23:39:07,061 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-05 23:39:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:07,061 INFO L225 Difference]: With dead ends: 80 [2021-05-05 23:39:07,061 INFO L226 Difference]: Without dead ends: 74 [2021-05-05 23:39:07,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 432.6ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-05 23:39:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-05 23:39:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-05 23:39:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-05 23:39:07,064 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-05 23:39:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:07,064 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-05 23:39:07,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-05 23:39:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-05 23:39:07,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:07,065 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:07,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-05 23:39:07,292 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:07,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1654532967, now seen corresponding path program 30 times [2021-05-05 23:39:07,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:07,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724788761] [2021-05-05 23:39:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:07,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:07,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:07,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724788761] [2021-05-05 23:39:07,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724788761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:07,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149392057] [2021-05-05 23:39:07,788 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 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 [2021-05-05 23:39:11,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-05 23:39:11,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:39:11,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-05 23:39:11,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:11,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:11,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149392057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:11,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:11,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-05-05 23:39:11,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841411533] [2021-05-05 23:39:11,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-05 23:39:11,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:11,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-05 23:39:11,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-05 23:39:11,180 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:11,329 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-05 23:39:11,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-05 23:39:11,330 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-05 23:39:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:11,330 INFO L225 Difference]: With dead ends: 82 [2021-05-05 23:39:11,330 INFO L226 Difference]: Without dead ends: 76 [2021-05-05 23:39:11,332 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 454.9ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-05 23:39:11,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-05 23:39:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-05 23:39:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:11,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-05 23:39:11,337 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-05 23:39:11,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:11,337 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-05 23:39:11,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-05 23:39:11,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-05 23:39:11,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:11,338 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:11,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:39:11,557 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:11,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1709003397, now seen corresponding path program 31 times [2021-05-05 23:39:11,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:11,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655390675] [2021-05-05 23:39:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:12,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:12,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:12,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655390675] [2021-05-05 23:39:12,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655390675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:12,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428500261] [2021-05-05 23:39:12,088 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 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 [2021-05-05 23:39:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:12,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-05 23:39:12,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:12,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:12,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428500261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:12,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:12,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2021-05-05 23:39:12,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874427873] [2021-05-05 23:39:12,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-05 23:39:12,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:12,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-05 23:39:12,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-05 23:39:12,296 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:12,448 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-05 23:39:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-05 23:39:12,448 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-05 23:39:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:12,449 INFO L225 Difference]: With dead ends: 84 [2021-05-05 23:39:12,449 INFO L226 Difference]: Without dead ends: 78 [2021-05-05 23:39:12,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 485.6ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-05 23:39:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-05 23:39:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-05 23:39:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-05 23:39:12,452 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-05 23:39:12,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:12,452 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-05 23:39:12,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:12,453 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-05 23:39:12,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-05 23:39:12,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:12,453 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:12,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-05 23:39:12,657 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:12,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:12,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1779488221, now seen corresponding path program 32 times [2021-05-05 23:39:12,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:12,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835363632] [2021-05-05 23:39:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:13,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:13,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:13,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835363632] [2021-05-05 23:39:13,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835363632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:13,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526531934] [2021-05-05 23:39:13,238 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 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 [2021-05-05 23:39:13,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-05 23:39:13,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:39:13,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-05 23:39:13,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:13,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:13,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526531934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:13,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:13,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-05 23:39:13,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880236652] [2021-05-05 23:39:13,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-05 23:39:13,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:13,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-05 23:39:13,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-05 23:39:13,470 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:13,617 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-05 23:39:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-05 23:39:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-05 23:39:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:13,618 INFO L225 Difference]: With dead ends: 86 [2021-05-05 23:39:13,618 INFO L226 Difference]: Without dead ends: 80 [2021-05-05 23:39:13,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-05 23:39:13,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-05 23:39:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-05 23:39:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-05 23:39:13,621 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-05 23:39:13,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:13,622 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-05 23:39:13,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:13,622 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-05 23:39:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-05 23:39:13,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:13,622 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:13,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-05 23:39:13,837 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:13,837 INFO L82 PathProgramCache]: Analyzing trace with hash -149525057, now seen corresponding path program 33 times [2021-05-05 23:39:13,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:13,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118754462] [2021-05-05 23:39:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:14,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:14,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:14,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118754462] [2021-05-05 23:39:14,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118754462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:14,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319469329] [2021-05-05 23:39:14,386 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 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 [2021-05-05 23:39:31,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-05 23:39:31,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:39:31,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-05 23:39:31,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:31,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:31,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319469329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:31,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:31,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-05 23:39:31,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513753901] [2021-05-05 23:39:31,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-05 23:39:31,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:31,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-05 23:39:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-05 23:39:31,995 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:32,129 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-05 23:39:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-05 23:39:32,129 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-05 23:39:32,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:32,130 INFO L225 Difference]: With dead ends: 88 [2021-05-05 23:39:32,130 INFO L226 Difference]: Without dead ends: 82 [2021-05-05 23:39:32,130 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 498.5ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-05 23:39:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-05 23:39:32,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-05 23:39:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-05 23:39:32,133 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-05 23:39:32,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:32,133 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-05 23:39:32,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:32,133 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-05 23:39:32,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-05 23:39:32,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:32,134 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:32,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-05 23:39:32,341 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:32,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:32,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1494586657, now seen corresponding path program 34 times [2021-05-05 23:39:32,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:32,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271788802] [2021-05-05 23:39:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:32,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:32,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:32,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271788802] [2021-05-05 23:39:32,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271788802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:32,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012268858] [2021-05-05 23:39:32,891 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 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 [2021-05-05 23:39:32,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-05 23:39:32,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:39:32,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-05 23:39:32,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:32,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:32,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:33,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012268858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:33,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:33,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2021-05-05 23:39:33,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646773930] [2021-05-05 23:39:33,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-05 23:39:33,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:33,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-05 23:39:33,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-05 23:39:33,121 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:33,270 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-05 23:39:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-05 23:39:33,271 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-05 23:39:33,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:33,271 INFO L225 Difference]: With dead ends: 90 [2021-05-05 23:39:33,271 INFO L226 Difference]: Without dead ends: 84 [2021-05-05 23:39:33,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 513.2ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-05 23:39:33,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-05 23:39:33,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-05 23:39:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:33,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-05 23:39:33,275 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-05 23:39:33,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:33,276 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-05 23:39:33,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:33,276 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-05 23:39:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-05 23:39:33,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:33,276 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:33,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-05 23:39:33,481 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:33,481 INFO L82 PathProgramCache]: Analyzing trace with hash 937978883, now seen corresponding path program 35 times [2021-05-05 23:39:33,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:33,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328979657] [2021-05-05 23:39:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:34,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:34,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:34,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328979657] [2021-05-05 23:39:34,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328979657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:34,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615557590] [2021-05-05 23:39:34,100 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 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 [2021-05-05 23:39:34,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-05 23:39:34,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:39:34,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-05 23:39:34,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:34,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:34,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:35,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615557590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:35,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:35,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-05 23:39:35,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854237901] [2021-05-05 23:39:35,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-05 23:39:35,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:35,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-05 23:39:35,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-05 23:39:35,148 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:35,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:35,303 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-05 23:39:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-05 23:39:35,304 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-05 23:39:35,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:35,304 INFO L225 Difference]: With dead ends: 92 [2021-05-05 23:39:35,305 INFO L226 Difference]: Without dead ends: 86 [2021-05-05 23:39:35,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 550.1ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-05 23:39:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-05 23:39:35,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-05 23:39:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-05 23:39:35,308 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-05 23:39:35,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:35,308 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-05 23:39:35,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-05 23:39:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-05 23:39:35,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:35,309 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:35,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-05 23:39:35,525 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:35,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1386147227, now seen corresponding path program 36 times [2021-05-05 23:39:35,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:35,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336349991] [2021-05-05 23:39:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:36,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:36,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:36,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336349991] [2021-05-05 23:39:36,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336349991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:36,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907044306] [2021-05-05 23:39:36,145 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 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 [2021-05-05 23:39:50,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-05 23:39:50,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:39:50,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-05 23:39:50,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:50,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:50,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907044306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:50,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:50,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-05-05 23:39:50,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462327064] [2021-05-05 23:39:50,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-05 23:39:50,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:50,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-05 23:39:50,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-05 23:39:50,376 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:50,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:50,527 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-05 23:39:50,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-05 23:39:50,528 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-05 23:39:50,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:50,528 INFO L225 Difference]: With dead ends: 94 [2021-05-05 23:39:50,528 INFO L226 Difference]: Without dead ends: 88 [2021-05-05 23:39:50,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 575.0ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-05 23:39:50,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-05 23:39:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-05 23:39:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-05 23:39:50,531 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-05 23:39:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:50,531 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-05 23:39:50,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-05 23:39:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-05 23:39:50,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:50,532 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:50,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-05 23:39:50,741 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:50,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1488345017, now seen corresponding path program 37 times [2021-05-05 23:39:50,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:50,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578210083] [2021-05-05 23:39:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:51,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:51,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:51,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578210083] [2021-05-05 23:39:51,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578210083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:51,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439658475] [2021-05-05 23:39:51,425 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 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 [2021-05-05 23:39:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:51,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-05 23:39:51,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:51,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:51,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439658475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:51,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:51,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2021-05-05 23:39:51,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462528389] [2021-05-05 23:39:51,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-05 23:39:51,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:51,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-05 23:39:51,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-05 23:39:51,638 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:51,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:51,765 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-05 23:39:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-05 23:39:51,765 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-05 23:39:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:51,766 INFO L225 Difference]: With dead ends: 96 [2021-05-05 23:39:51,766 INFO L226 Difference]: Without dead ends: 90 [2021-05-05 23:39:51,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 642.6ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-05 23:39:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-05 23:39:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-05 23:39:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-05 23:39:51,769 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-05 23:39:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:51,770 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-05 23:39:51,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:51,770 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-05 23:39:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-05 23:39:51,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:51,770 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:51,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-05 23:39:51,977 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:51,977 INFO L82 PathProgramCache]: Analyzing trace with hash -916173399, now seen corresponding path program 38 times [2021-05-05 23:39:51,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:51,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009598361] [2021-05-05 23:39:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:52,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:52,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:52,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009598361] [2021-05-05 23:39:52,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009598361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:52,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696467834] [2021-05-05 23:39:52,653 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 [2021-05-05 23:39:52,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-05 23:39:52,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:39:52,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-05 23:39:52,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:39:52,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:39:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:52,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696467834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:52,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:39:52,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-05 23:39:52,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770069466] [2021-05-05 23:39:52,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-05 23:39:52,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:39:52,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-05 23:39:52,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-05 23:39:52,898 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:53,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:39:53,039 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-05 23:39:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-05 23:39:53,039 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-05 23:39:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:39:53,040 INFO L225 Difference]: With dead ends: 98 [2021-05-05 23:39:53,040 INFO L226 Difference]: Without dead ends: 92 [2021-05-05 23:39:53,040 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 622.4ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-05 23:39:53,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-05 23:39:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-05 23:39:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-05 23:39:53,043 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-05 23:39:53,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:39:53,043 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-05 23:39:53,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:39:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-05 23:39:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-05 23:39:53,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:39:53,044 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:39:53,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-05 23:39:53,253 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:39:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:39:53,253 INFO L82 PathProgramCache]: Analyzing trace with hash -815062389, now seen corresponding path program 39 times [2021-05-05 23:39:53,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:39:53,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884567354] [2021-05-05 23:39:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:39:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:53,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:39:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:39:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:39:53,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:39:53,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884567354] [2021-05-05 23:39:53,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884567354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:39:53,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787688345] [2021-05-05 23:39:53,992 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 [2021-05-05 23:40:56,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-05 23:40:56,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:40:56,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-05 23:40:56,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:40:56,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:40:56,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787688345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:40:56,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:40:56,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-05 23:40:56,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265483607] [2021-05-05 23:40:56,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-05 23:40:56,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:40:56,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-05 23:40:56,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-05 23:40:56,895 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:40:57,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:40:57,082 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-05 23:40:57,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-05 23:40:57,082 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-05 23:40:57,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:40:57,083 INFO L225 Difference]: With dead ends: 100 [2021-05-05 23:40:57,083 INFO L226 Difference]: Without dead ends: 94 [2021-05-05 23:40:57,084 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 697.0ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-05 23:40:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-05 23:40:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-05 23:40:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:40:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-05 23:40:57,086 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-05 23:40:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:40:57,086 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-05 23:40:57,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:40:57,087 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-05 23:40:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-05 23:40:57,087 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:40:57,087 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:40:57,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:40:57,301 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:40:57,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:40:57,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1863337709, now seen corresponding path program 40 times [2021-05-05 23:40:57,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:40:57,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224317739] [2021-05-05 23:40:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:40:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:40:58,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:40:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:40:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:40:58,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:40:58,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224317739] [2021-05-05 23:40:58,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224317739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:40:58,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935829018] [2021-05-05 23:40:58,050 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 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 [2021-05-05 23:40:58,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-05 23:40:58,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:40:58,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-05 23:40:58,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:40:58,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:40:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:40:58,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935829018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:40:58,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:40:58,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2021-05-05 23:40:58,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584311026] [2021-05-05 23:40:58,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-05 23:40:58,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:40:58,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-05 23:40:58,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-05 23:40:58,287 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:40:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:40:58,415 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-05 23:40:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-05 23:40:58,416 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-05 23:40:58,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:40:58,416 INFO L225 Difference]: With dead ends: 102 [2021-05-05 23:40:58,417 INFO L226 Difference]: Without dead ends: 96 [2021-05-05 23:40:58,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 695.5ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-05 23:40:58,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-05 23:40:58,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-05 23:40:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:40:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-05 23:40:58,419 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-05 23:40:58,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:40:58,420 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-05 23:40:58,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:40:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-05 23:40:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-05 23:40:58,420 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:40:58,420 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:40:58,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:40:58,621 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:40:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:40:58,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1174545713, now seen corresponding path program 41 times [2021-05-05 23:40:58,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:40:58,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977537980] [2021-05-05 23:40:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:40:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:40:59,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:40:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:40:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:40:59,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:40:59,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977537980] [2021-05-05 23:40:59,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977537980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:40:59,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305026989] [2021-05-05 23:40:59,427 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 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 [2021-05-05 23:41:09,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-05 23:41:09,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:41:09,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-05 23:41:09,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:41:09,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:41:09,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305026989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:41:09,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:41:09,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-05 23:41:09,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143860925] [2021-05-05 23:41:09,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-05 23:41:09,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:41:09,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-05 23:41:09,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-05 23:41:09,597 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:41:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:41:09,773 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-05 23:41:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-05 23:41:09,773 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-05 23:41:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:41:09,774 INFO L225 Difference]: With dead ends: 104 [2021-05-05 23:41:09,774 INFO L226 Difference]: Without dead ends: 98 [2021-05-05 23:41:09,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 743.9ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-05 23:41:09,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-05 23:41:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-05 23:41:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:41:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-05 23:41:09,777 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-05 23:41:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:41:09,777 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-05 23:41:09,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:41:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-05 23:41:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-05 23:41:09,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:41:09,778 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:41:10,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-05 23:41:10,001 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:41:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:41:10,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2752975, now seen corresponding path program 42 times [2021-05-05 23:41:10,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:41:10,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677297270] [2021-05-05 23:41:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:41:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:41:10,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:41:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:41:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:41:10,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:41:10,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677297270] [2021-05-05 23:41:10,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677297270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:41:10,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274540466] [2021-05-05 23:41:10,783 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 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 [2021-05-05 23:41:56,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-05 23:41:56,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:41:56,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-05 23:41:56,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:41:56,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:41:56,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274540466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:41:56,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:41:56,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-05-05 23:41:56,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480583865] [2021-05-05 23:41:56,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-05 23:41:56,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:41:56,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-05 23:41:56,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-05 23:41:56,822 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:41:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:41:57,009 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-05 23:41:57,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-05 23:41:57,010 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-05 23:41:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:41:57,010 INFO L225 Difference]: With dead ends: 106 [2021-05-05 23:41:57,010 INFO L226 Difference]: Without dead ends: 100 [2021-05-05 23:41:57,011 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 742.9ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-05 23:41:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-05 23:41:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-05 23:41:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:41:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-05 23:41:57,013 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-05 23:41:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:41:57,014 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-05 23:41:57,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:41:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-05 23:41:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-05 23:41:57,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:41:57,014 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:41:57,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:41:57,221 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:41:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:41:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash 808636691, now seen corresponding path program 43 times [2021-05-05 23:41:57,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:41:57,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805767842] [2021-05-05 23:41:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:41:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:41:58,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:41:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:41:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:41:58,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:41:58,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805767842] [2021-05-05 23:41:58,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805767842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:41:58,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538770811] [2021-05-05 23:41:58,082 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 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 [2021-05-05 23:41:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:41:58,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-05 23:41:58,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:41:58,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:41:58,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538770811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:41:58,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:41:58,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2021-05-05 23:41:58,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365822352] [2021-05-05 23:41:58,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-05 23:41:58,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:41:58,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-05 23:41:58,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-05 23:41:58,350 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:41:58,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:41:58,522 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-05 23:41:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-05 23:41:58,522 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-05 23:41:58,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:41:58,523 INFO L225 Difference]: With dead ends: 108 [2021-05-05 23:41:58,523 INFO L226 Difference]: Without dead ends: 102 [2021-05-05 23:41:58,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 789.5ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-05 23:41:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-05 23:41:58,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-05 23:41:58,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:41:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-05 23:41:58,526 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-05 23:41:58,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:41:58,526 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-05 23:41:58,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:41:58,526 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-05 23:41:58,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-05 23:41:58,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:41:58,527 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:41:58,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:41:58,745 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:41:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:41:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1129942155, now seen corresponding path program 44 times [2021-05-05 23:41:58,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:41:58,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372192693] [2021-05-05 23:41:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:41:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:41:59,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:41:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:41:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:41:59,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:41:59,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372192693] [2021-05-05 23:41:59,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372192693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:41:59,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876653976] [2021-05-05 23:41:59,611 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 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 [2021-05-05 23:41:59,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-05 23:41:59,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:41:59,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-05 23:41:59,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:41:59,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:41:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:41:59,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876653976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:41:59,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:41:59,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-05 23:41:59,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412471329] [2021-05-05 23:41:59,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-05 23:41:59,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:41:59,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-05 23:41:59,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-05 23:41:59,835 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:42:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:42:00,047 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-05 23:42:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-05 23:42:00,047 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-05 23:42:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:42:00,048 INFO L225 Difference]: With dead ends: 110 [2021-05-05 23:42:00,048 INFO L226 Difference]: Without dead ends: 104 [2021-05-05 23:42:00,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 822.2ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-05 23:42:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-05 23:42:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-05 23:42:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:42:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-05 23:42:00,051 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-05 23:42:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:42:00,051 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-05 23:42:00,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:42:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-05 23:42:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-05 23:42:00,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:42:00,052 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:42:00,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-05 23:42:00,276 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:42:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:42:00,276 INFO L82 PathProgramCache]: Analyzing trace with hash -88406697, now seen corresponding path program 45 times [2021-05-05 23:42:00,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:42:00,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697500443] [2021-05-05 23:42:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:42:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:42:01,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:42:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:42:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:42:01,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:42:01,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697500443] [2021-05-05 23:42:01,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697500443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:42:01,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594762491] [2021-05-05 23:42:01,148 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 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 [2021-05-05 23:43:45,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-05-05 23:43:45,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:43:45,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-05 23:43:45,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:43:45,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:43:45,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594762491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:43:45,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:43:45,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-05 23:43:45,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324790857] [2021-05-05 23:43:45,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-05 23:43:45,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:43:45,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-05 23:43:45,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-05 23:43:45,740 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:43:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:43:45,898 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-05 23:43:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-05 23:43:45,898 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-05 23:43:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:43:45,899 INFO L225 Difference]: With dead ends: 112 [2021-05-05 23:43:45,899 INFO L226 Difference]: Without dead ends: 106 [2021-05-05 23:43:45,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 823.4ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-05 23:43:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-05 23:43:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-05 23:43:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:43:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-05 23:43:45,902 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-05 23:43:45,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:43:45,903 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-05 23:43:45,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:43:45,903 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-05 23:43:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-05 23:43:45,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:43:45,903 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:43:46,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-05 23:43:46,117 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:43:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:43:46,117 INFO L82 PathProgramCache]: Analyzing trace with hash 99788473, now seen corresponding path program 46 times [2021-05-05 23:43:46,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:43:46,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219232067] [2021-05-05 23:43:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:43:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:43:47,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:43:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:43:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:43:47,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:43:47,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219232067] [2021-05-05 23:43:47,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219232067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:43:47,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99259717] [2021-05-05 23:43:47,151 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 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 [2021-05-05 23:43:47,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-05 23:43:47,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:43:47,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-05 23:43:47,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:43:47,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:43:47,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99259717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:43:47,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:43:47,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2021-05-05 23:43:47,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720282651] [2021-05-05 23:43:47,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-05 23:43:47,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:43:47,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-05 23:43:47,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-05 23:43:47,393 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:43:47,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:43:47,592 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-05 23:43:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-05 23:43:47,592 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-05 23:43:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:43:47,593 INFO L225 Difference]: With dead ends: 114 [2021-05-05 23:43:47,593 INFO L226 Difference]: Without dead ends: 108 [2021-05-05 23:43:47,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 981.0ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-05 23:43:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-05 23:43:47,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-05 23:43:47,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:43:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-05 23:43:47,596 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-05 23:43:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:43:47,597 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-05 23:43:47,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:43:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-05 23:43:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-05 23:43:47,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:43:47,597 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:43:47,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-05 23:43:47,813 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:43:47,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:43:47,813 INFO L82 PathProgramCache]: Analyzing trace with hash 566720411, now seen corresponding path program 47 times [2021-05-05 23:43:47,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:43:47,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421230368] [2021-05-05 23:43:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:43:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:43:48,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:43:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:43:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:43:48,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:43:48,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421230368] [2021-05-05 23:43:48,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421230368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:43:48,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323426981] [2021-05-05 23:43:48,821 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 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 [2021-05-05 23:43:54,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-05-05 23:43:54,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:43:54,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-05 23:43:54,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:43:54,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:43:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:43:54,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323426981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:43:54,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:43:54,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-05 23:43:54,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928865839] [2021-05-05 23:43:54,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-05 23:43:54,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:43:54,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-05 23:43:54,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-05 23:43:54,822 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:43:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:43:55,070 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-05 23:43:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-05 23:43:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-05 23:43:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:43:55,071 INFO L225 Difference]: With dead ends: 116 [2021-05-05 23:43:55,071 INFO L226 Difference]: Without dead ends: 110 [2021-05-05 23:43:55,072 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 958.6ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-05 23:43:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-05 23:43:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-05 23:43:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:43:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-05 23:43:55,075 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-05 23:43:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:43:55,075 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-05 23:43:55,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:43:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-05 23:43:55,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-05 23:43:55,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:43:55,076 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:43:55,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:43:55,301 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:43:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:43:55,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1683253251, now seen corresponding path program 48 times [2021-05-05 23:43:55,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:43:55,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11490301] [2021-05-05 23:43:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:43:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:43:56,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:43:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:43:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:43:56,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:43:56,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11490301] [2021-05-05 23:43:56,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11490301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:43:56,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806084813] [2021-05-05 23:43:56,311 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 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 [2021-05-05 23:45:48,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-05-05 23:45:48,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:45:49,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-05 23:45:49,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:45:49,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:45:49,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806084813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:45:49,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:45:49,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-05 23:45:49,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20034648] [2021-05-05 23:45:49,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-05 23:45:49,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:45:49,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-05 23:45:49,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-05 23:45:49,302 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:45:49,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:45:49,511 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-05 23:45:49,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-05 23:45:49,511 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-05 23:45:49,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:45:49,512 INFO L225 Difference]: With dead ends: 118 [2021-05-05 23:45:49,512 INFO L226 Difference]: Without dead ends: 112 [2021-05-05 23:45:49,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 955.5ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-05 23:45:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-05 23:45:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-05 23:45:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:45:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-05 23:45:49,515 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-05 23:45:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:45:49,516 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-05 23:45:49,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:45:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-05 23:45:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-05 23:45:49,517 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:45:49,517 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:45:49,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-05 23:45:49,745 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:45:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:45:49,745 INFO L82 PathProgramCache]: Analyzing trace with hash 755574751, now seen corresponding path program 49 times [2021-05-05 23:45:49,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:45:49,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426217736] [2021-05-05 23:45:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:45:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:45:50,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:45:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:45:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:45:50,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:45:50,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426217736] [2021-05-05 23:45:50,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426217736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:45:50,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109531581] [2021-05-05 23:45:50,826 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 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 [2021-05-05 23:45:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:45:50,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-05 23:45:50,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:45:50,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:50,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:45:51,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109531581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:45:51,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:45:51,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2021-05-05 23:45:51,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134841684] [2021-05-05 23:45:51,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-05 23:45:51,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:45:51,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-05 23:45:51,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-05 23:45:51,076 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:45:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:45:51,241 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-05 23:45:51,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-05 23:45:51,242 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-05 23:45:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:45:51,243 INFO L225 Difference]: With dead ends: 120 [2021-05-05 23:45:51,244 INFO L226 Difference]: Without dead ends: 114 [2021-05-05 23:45:51,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1027.6ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-05 23:45:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-05 23:45:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-05 23:45:51,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:45:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-05 23:45:51,248 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-05 23:45:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:45:51,248 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-05 23:45:51,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:45:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-05 23:45:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-05 23:45:51,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:45:51,249 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:45:51,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:45:51,473 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:45:51,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:45:51,473 INFO L82 PathProgramCache]: Analyzing trace with hash -582858943, now seen corresponding path program 50 times [2021-05-05 23:45:51,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:45:51,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359895095] [2021-05-05 23:45:51,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:45:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:45:52,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:45:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:45:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:45:52,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:45:52,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359895095] [2021-05-05 23:45:52,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359895095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:45:52,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113012221] [2021-05-05 23:45:52,542 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 [2021-05-05 23:45:52,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-05 23:45:52,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-05 23:45:52,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-05 23:45:52,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-05 23:45:52,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-05 23:45:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:45:52,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113012221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:45:52,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-05 23:45:52,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-05 23:45:52,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866853094] [2021-05-05 23:45:52,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-05 23:45:52,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:45:52,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-05 23:45:52,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-05 23:45:52,805 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:45:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:45:53,009 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-05 23:45:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-05 23:45:53,009 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-05-05 23:45:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:45:53,010 INFO L225 Difference]: With dead ends: 122 [2021-05-05 23:45:53,010 INFO L226 Difference]: Without dead ends: 116 [2021-05-05 23:45:53,010 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1021.8ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-05 23:45:53,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-05 23:45:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-05 23:45:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:45:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-05 23:45:53,013 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-05 23:45:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:45:53,013 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-05 23:45:53,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-05 23:45:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-05 23:45:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-05 23:45:53,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:45:53,014 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:45:53,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-05 23:45:53,237 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:45:53,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:45:53,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1672549923, now seen corresponding path program 51 times [2021-05-05 23:45:53,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:45:53,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478006522] [2021-05-05 23:45:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:45:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:45:54,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:45:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:45:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:45:54,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:45:54,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478006522] [2021-05-05 23:45:54,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478006522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-05 23:45:54,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190533390] [2021-05-05 23:45:54,329 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