/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 10:56:58,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 10:56:58,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 10:56:58,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 10:56:58,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 10:56:58,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 10:56:58,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 10:56:58,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 10:56:58,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 10:56:58,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 10:56:58,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 10:56:58,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 10:56:58,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 10:56:58,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 10:56:58,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 10:56:58,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 10:56:58,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 10:56:58,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 10:56:58,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 10:56:58,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 10:56:58,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 10:56:58,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 10:56:58,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 10:56:58,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 10:56:58,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 10:56:58,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 10:56:58,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 10:56:58,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 10:56:58,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 10:56:58,456 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 10:56:58,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 10:56:58,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 10:56:58,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 10:56:58,458 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 10:56:58,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 10:56:58,458 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 10:56:58,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 10:56:58,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 10:56:58,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 10:56:58,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 10:56:58,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 10:56:58,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 10:56:58,459 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 10:56:58,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 10:56:58,460 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 10:56:58,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 10:56:58,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 10:56:58,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 10:56:58,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 10:56:58,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 10:56:58,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 10:56:58,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 10:56:58,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 10:56:58,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 10:56:58,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 10:56:58,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 10:56:58,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 10:56:58,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 10:56:58,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 10:56:58,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 10:56:58,792 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 10:56:58,795 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 10:56:58,796 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 10:56:58,796 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 10:56:58,797 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-07 10:56:58,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24bba7a94/ba836667473448a2a4a7f0acbfd1e426/FLAG43e8702ad [2020-07-07 10:56:59,353 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 10:56:59,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-07 10:56:59,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24bba7a94/ba836667473448a2a4a7f0acbfd1e426/FLAG43e8702ad [2020-07-07 10:56:59,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24bba7a94/ba836667473448a2a4a7f0acbfd1e426 [2020-07-07 10:56:59,764 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 10:56:59,766 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 10:56:59,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:59,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 10:56:59,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 10:56:59,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:59" (1/1) ... [2020-07-07 10:56:59,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60986292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:59, skipping insertion in model container [2020-07-07 10:56:59,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:59" (1/1) ... [2020-07-07 10:56:59,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 10:56:59,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 10:56:59,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:59,992 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 10:57:00,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:57:00,019 INFO L208 MainTranslator]: Completed translation [2020-07-07 10:57:00,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:00 WrapperNode [2020-07-07 10:57:00,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 10:57:00,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 10:57:00,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 10:57:00,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 10:57:00,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:00" (1/1) ... [2020-07-07 10:57:00,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:00" (1/1) ... [2020-07-07 10:57:00,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:00" (1/1) ... [2020-07-07 10:57:00,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:00" (1/1) ... [2020-07-07 10:57:00,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:00" (1/1) ... [2020-07-07 10:57:00,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:00" (1/1) ... [2020-07-07 10:57:00,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:00" (1/1) ... [2020-07-07 10:57:00,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 10:57:00,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 10:57:00,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 10:57:00,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 10:57:00,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 10:57:00,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 10:57:00,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 10:57:00,197 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-07-07 10:57:00,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 10:57:00,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 10:57:00,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 10:57:00,198 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-07-07 10:57:00,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 10:57:00,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 10:57:00,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 10:57:00,416 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 10:57:00,417 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 10:57:00,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:57:00 BoogieIcfgContainer [2020-07-07 10:57:00,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 10:57:00,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 10:57:00,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 10:57:00,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 10:57:00,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 10:56:59" (1/3) ... [2020-07-07 10:57:00,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3c8da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:57:00, skipping insertion in model container [2020-07-07 10:57:00,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:00" (2/3) ... [2020-07-07 10:57:00,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3c8da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:57:00, skipping insertion in model container [2020-07-07 10:57:00,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:57:00" (3/3) ... [2020-07-07 10:57:00,431 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-07-07 10:57:00,471 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 10:57:00,491 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 10:57:00,514 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 10:57:00,548 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 10:57:00,548 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 10:57:00,548 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 10:57:00,549 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 10:57:00,549 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 10:57:00,549 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 10:57:00,549 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 10:57:00,549 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 10:57:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-07 10:57:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-07 10:57:00,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:00,575 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:00,575 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:00,580 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-07-07 10:57:00,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:00,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503334146] [2020-07-07 10:57:00,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 10:57:00,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503334146] [2020-07-07 10:57:00,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706332862] [2020-07-07 10:57:00,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:00,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 10:57:00,908 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 10:57:00,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:00,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-07 10:57:00,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659133233] [2020-07-07 10:57:00,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 10:57:00,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:00,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 10:57:00,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:57:00,987 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-07 10:57:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:01,138 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-07-07 10:57:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 10:57:01,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-07 10:57:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:01,151 INFO L225 Difference]: With dead ends: 41 [2020-07-07 10:57:01,152 INFO L226 Difference]: Without dead ends: 25 [2020-07-07 10:57:01,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:57:01,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-07 10:57:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-07 10:57:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 10:57:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-07 10:57:01,205 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-07-07 10:57:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:01,206 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-07 10:57:01,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 10:57:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-07 10:57:01,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 10:57:01,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:01,209 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:01,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-07 10:57:01,422 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:01,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-07-07 10:57:01,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:01,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917865067] [2020-07-07 10:57:01,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 10:57:01,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917865067] [2020-07-07 10:57:01,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:57:01,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 10:57:01,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007686655] [2020-07-07 10:57:01,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 10:57:01,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:01,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 10:57:01,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 10:57:01,537 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-07-07 10:57:01,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:01,604 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-07 10:57:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 10:57:01,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-07 10:57:01,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:01,606 INFO L225 Difference]: With dead ends: 29 [2020-07-07 10:57:01,607 INFO L226 Difference]: Without dead ends: 25 [2020-07-07 10:57:01,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:57:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-07 10:57:01,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-07 10:57:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 10:57:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-07-07 10:57:01,616 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-07-07 10:57:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:01,617 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-07-07 10:57:01,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 10:57:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-07-07 10:57:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 10:57:01,619 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:01,619 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:01,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 10:57:01,620 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:01,620 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-07-07 10:57:01,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:01,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815404871] [2020-07-07 10:57:01,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-07 10:57:02,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815404871] [2020-07-07 10:57:02,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887133109] [2020-07-07 10:57:02,086 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:02,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:57:02,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:02,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-07 10:57:02,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-07 10:57:02,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:02,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-07-07 10:57:02,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949236067] [2020-07-07 10:57:02,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 10:57:02,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 10:57:02,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-07-07 10:57:02,415 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 21 states. [2020-07-07 10:57:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:02,955 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-07-07 10:57:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 10:57:02,955 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-07-07 10:57:02,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:02,959 INFO L225 Difference]: With dead ends: 43 [2020-07-07 10:57:02,959 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 10:57:02,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2020-07-07 10:57:02,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 10:57:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-07-07 10:57:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 10:57:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-07-07 10:57:02,984 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-07-07 10:57:02,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:02,986 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-07-07 10:57:02,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 10:57:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-07-07 10:57:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 10:57:02,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:02,990 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:03,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:03,209 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:03,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:03,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-07-07 10:57:03,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:03,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082868648] [2020-07-07 10:57:03,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-07 10:57:03,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082868648] [2020-07-07 10:57:03,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981666559] [2020-07-07 10:57:03,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:03,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 10:57:03,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-07 10:57:03,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:03,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-07-07 10:57:03,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379432362] [2020-07-07 10:57:03,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 10:57:03,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:03,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 10:57:03,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-07 10:57:03,458 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 10 states. [2020-07-07 10:57:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:03,559 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-07-07 10:57:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 10:57:03,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-07-07 10:57:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:03,563 INFO L225 Difference]: With dead ends: 54 [2020-07-07 10:57:03,563 INFO L226 Difference]: Without dead ends: 28 [2020-07-07 10:57:03,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-07 10:57:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-07 10:57:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-07 10:57:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-07 10:57:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-07-07 10:57:03,573 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2020-07-07 10:57:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:03,574 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-07-07 10:57:03,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 10:57:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-07-07 10:57:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-07 10:57:03,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:03,575 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:03,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:03,789 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:03,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:03,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-07-07 10:57:03,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:03,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260760670] [2020-07-07 10:57:03,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-07 10:57:04,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260760670] [2020-07-07 10:57:04,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496865739] [2020-07-07 10:57:04,148 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:04,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-07-07 10:57:04,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:04,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-07 10:57:04,187 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-07 10:57:04,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:04,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-07-07 10:57:04,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809938512] [2020-07-07 10:57:04,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-07 10:57:04,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:04,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-07 10:57:04,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-07-07 10:57:04,679 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 32 states. [2020-07-07 10:57:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:05,319 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-07-07 10:57:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 10:57:05,320 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 44 [2020-07-07 10:57:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:05,321 INFO L225 Difference]: With dead ends: 39 [2020-07-07 10:57:05,322 INFO L226 Difference]: Without dead ends: 35 [2020-07-07 10:57:05,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 10:57:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-07 10:57:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-07-07 10:57:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-07 10:57:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-07-07 10:57:05,342 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2020-07-07 10:57:05,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:05,342 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-07-07 10:57:05,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-07 10:57:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-07-07 10:57:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-07 10:57:05,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:05,344 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:05,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:05,553 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2020-07-07 10:57:05,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:05,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252219818] [2020-07-07 10:57:05,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-07 10:57:05,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252219818] [2020-07-07 10:57:05,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778592160] [2020-07-07 10:57:05,993 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:06,037 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:57:06,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:06,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-07 10:57:06,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-07 10:57:06,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:06,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 37 [2020-07-07 10:57:06,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668030530] [2020-07-07 10:57:06,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-07 10:57:06,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:06,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-07 10:57:06,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 10:57:06,728 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 37 states. [2020-07-07 10:57:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:07,635 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-07 10:57:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 10:57:07,636 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 51 [2020-07-07 10:57:07,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:07,637 INFO L225 Difference]: With dead ends: 42 [2020-07-07 10:57:07,637 INFO L226 Difference]: Without dead ends: 38 [2020-07-07 10:57:07,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=209, Invalid=2047, Unknown=0, NotChecked=0, Total=2256 [2020-07-07 10:57:07,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-07 10:57:07,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-07-07 10:57:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-07 10:57:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-07-07 10:57:07,648 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2020-07-07 10:57:07,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:07,649 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-07-07 10:57:07,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-07 10:57:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-07-07 10:57:07,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-07 10:57:07,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:07,650 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:07,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 10:57:07,866 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:07,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:07,867 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-07-07 10:57:07,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:07,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373589863] [2020-07-07 10:57:07,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-07-07 10:57:08,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373589863] [2020-07-07 10:57:08,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073506872] [2020-07-07 10:57:08,462 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:08,511 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-07-07 10:57:08,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:08,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-07 10:57:08,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-07 10:57:09,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:09,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 41 [2020-07-07 10:57:09,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229387832] [2020-07-07 10:57:09,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-07 10:57:09,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:09,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-07 10:57:09,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 10:57:09,399 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 41 states. [2020-07-07 10:57:10,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:10,659 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-07-07 10:57:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 10:57:10,659 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 58 [2020-07-07 10:57:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:10,662 INFO L225 Difference]: With dead ends: 45 [2020-07-07 10:57:10,662 INFO L226 Difference]: Without dead ends: 41 [2020-07-07 10:57:10,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=241, Invalid=2621, Unknown=0, NotChecked=0, Total=2862 [2020-07-07 10:57:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-07 10:57:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-07-07 10:57:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-07 10:57:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-07-07 10:57:10,673 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2020-07-07 10:57:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:10,674 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-07-07 10:57:10,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-07 10:57:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-07-07 10:57:10,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-07 10:57:10,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:10,675 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:10,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:10,879 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:10,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 6 times [2020-07-07 10:57:10,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:10,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452718387] [2020-07-07 10:57:10,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-07 10:57:11,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452718387] [2020-07-07 10:57:11,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346416843] [2020-07-07 10:57:11,211 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:11,255 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-07 10:57:11,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:11,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 72 conjunts are in the unsatisfiable core [2020-07-07 10:57:11,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-07 10:57:11,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:11,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2020-07-07 10:57:11,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796990342] [2020-07-07 10:57:11,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-07 10:57:11,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:11,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-07 10:57:11,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2020-07-07 10:57:11,736 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 27 states. [2020-07-07 10:57:12,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:12,296 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-07-07 10:57:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 10:57:12,296 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2020-07-07 10:57:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:12,298 INFO L225 Difference]: With dead ends: 49 [2020-07-07 10:57:12,298 INFO L226 Difference]: Without dead ends: 43 [2020-07-07 10:57:12,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 10:57:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-07 10:57:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-07-07 10:57:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 10:57:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-07-07 10:57:12,308 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2020-07-07 10:57:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:12,308 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-07-07 10:57:12,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-07 10:57:12,308 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-07-07 10:57:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-07 10:57:12,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:12,310 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:12,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:12,518 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1605933725, now seen corresponding path program 7 times [2020-07-07 10:57:12,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:12,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460033191] [2020-07-07 10:57:12,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-07-07 10:57:13,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460033191] [2020-07-07 10:57:13,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386812859] [2020-07-07 10:57:13,107 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:13,152 WARN L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 85 conjunts are in the unsatisfiable core [2020-07-07 10:57:13,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-07 10:57:13,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:13,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 34 [2020-07-07 10:57:13,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583355514] [2020-07-07 10:57:13,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-07 10:57:13,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:13,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-07 10:57:13,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 10:57:13,713 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 34 states. [2020-07-07 10:57:14,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:14,668 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-07-07 10:57:14,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 10:57:14,669 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 58 [2020-07-07 10:57:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:14,671 INFO L225 Difference]: With dead ends: 47 [2020-07-07 10:57:14,671 INFO L226 Difference]: Without dead ends: 43 [2020-07-07 10:57:14,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 10:57:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-07 10:57:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-07-07 10:57:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 10:57:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-07-07 10:57:14,681 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 58 [2020-07-07 10:57:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:14,681 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-07-07 10:57:14,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-07 10:57:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-07-07 10:57:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-07 10:57:14,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:14,683 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:14,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 10:57:14,897 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:14,898 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 8 times [2020-07-07 10:57:14,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:14,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350982307] [2020-07-07 10:57:14,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-07 10:57:15,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350982307] [2020-07-07 10:57:15,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294750764] [2020-07-07 10:57:15,595 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:15,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:57:15,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:15,657 WARN L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-07 10:57:15,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:16,362 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 83 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-07 10:57:16,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:16,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 38 [2020-07-07 10:57:16,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239082488] [2020-07-07 10:57:16,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-07 10:57:16,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:16,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-07 10:57:16,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2020-07-07 10:57:16,365 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 38 states. [2020-07-07 10:57:17,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:17,549 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-07-07 10:57:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 10:57:17,549 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 65 [2020-07-07 10:57:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:17,550 INFO L225 Difference]: With dead ends: 47 [2020-07-07 10:57:17,550 INFO L226 Difference]: Without dead ends: 43 [2020-07-07 10:57:17,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=2154, Unknown=0, NotChecked=0, Total=2352 [2020-07-07 10:57:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-07 10:57:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-07-07 10:57:17,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-07 10:57:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-07-07 10:57:17,560 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2020-07-07 10:57:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:17,560 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-07-07 10:57:17,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-07 10:57:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-07-07 10:57:17,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-07 10:57:17,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:17,562 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:17,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:17,766 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:17,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:17,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 9 times [2020-07-07 10:57:17,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:17,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393961316] [2020-07-07 10:57:17,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-07 10:57:18,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393961316] [2020-07-07 10:57:18,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233685413] [2020-07-07 10:57:18,363 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:18,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-07-07 10:57:18,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:18,438 WARN L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 93 conjunts are in the unsatisfiable core [2020-07-07 10:57:18,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 32 proven. 80 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-07-07 10:57:19,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:19,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2020-07-07 10:57:19,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664781431] [2020-07-07 10:57:19,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-07 10:57:19,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:19,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-07 10:57:19,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1855, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 10:57:19,501 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 45 states. [2020-07-07 10:57:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:21,039 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-07-07 10:57:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 10:57:21,040 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 65 [2020-07-07 10:57:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:21,041 INFO L225 Difference]: With dead ends: 50 [2020-07-07 10:57:21,042 INFO L226 Difference]: Without dead ends: 46 [2020-07-07 10:57:21,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=273, Invalid=3267, Unknown=0, NotChecked=0, Total=3540 [2020-07-07 10:57:21,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-07 10:57:21,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-07-07 10:57:21,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 10:57:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-07-07 10:57:21,052 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2020-07-07 10:57:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:21,052 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-07-07 10:57:21,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-07 10:57:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-07-07 10:57:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-07 10:57:21,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:21,054 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:21,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:21,261 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:21,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 10 times [2020-07-07 10:57:21,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:21,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869059170] [2020-07-07 10:57:21,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-07 10:57:21,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869059170] [2020-07-07 10:57:21,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455752740] [2020-07-07 10:57:21,997 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:22,049 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:57:22,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:22,053 WARN L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 109 conjunts are in the unsatisfiable core [2020-07-07 10:57:22,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-07-07 10:57:22,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:22,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 42 [2020-07-07 10:57:22,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132383822] [2020-07-07 10:57:22,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-07 10:57:22,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:22,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-07 10:57:22,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1611, Unknown=0, NotChecked=0, Total=1722 [2020-07-07 10:57:22,960 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 42 states. [2020-07-07 10:57:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:24,335 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-07-07 10:57:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 10:57:24,336 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 72 [2020-07-07 10:57:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:24,338 INFO L225 Difference]: With dead ends: 50 [2020-07-07 10:57:24,338 INFO L226 Difference]: Without dead ends: 46 [2020-07-07 10:57:24,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=226, Invalid=2744, Unknown=0, NotChecked=0, Total=2970 [2020-07-07 10:57:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-07 10:57:24,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-07 10:57:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-07 10:57:24,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-07-07 10:57:24,349 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2020-07-07 10:57:24,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:24,349 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-07-07 10:57:24,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-07 10:57:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-07-07 10:57:24,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-07 10:57:24,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:24,351 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:24,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-07 10:57:24,566 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:24,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1677321585, now seen corresponding path program 11 times [2020-07-07 10:57:24,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:24,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839705240] [2020-07-07 10:57:24,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-07 10:57:25,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839705240] [2020-07-07 10:57:25,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895345224] [2020-07-07 10:57:25,542 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:25,598 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-07-07 10:57:25,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:25,603 WARN L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 109 conjunts are in the unsatisfiable core [2020-07-07 10:57:25,605 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-07 10:57:26,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:26,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 40 [2020-07-07 10:57:26,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899395876] [2020-07-07 10:57:26,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-07 10:57:26,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:26,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-07 10:57:26,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1453, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 10:57:26,420 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 40 states. [2020-07-07 10:57:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:27,836 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-07-07 10:57:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 10:57:27,837 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 72 [2020-07-07 10:57:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:27,838 INFO L225 Difference]: With dead ends: 52 [2020-07-07 10:57:27,838 INFO L226 Difference]: Without dead ends: 46 [2020-07-07 10:57:27,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=218, Invalid=2538, Unknown=0, NotChecked=0, Total=2756 [2020-07-07 10:57:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-07 10:57:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-07-07 10:57:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 10:57:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-07-07 10:57:27,848 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 72 [2020-07-07 10:57:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:27,848 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-07-07 10:57:27,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-07 10:57:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-07-07 10:57:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 10:57:27,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:27,850 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:28,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 10:57:28,057 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:28,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 12 times [2020-07-07 10:57:28,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:28,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383694759] [2020-07-07 10:57:28,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-07 10:57:28,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383694759] [2020-07-07 10:57:28,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098205678] [2020-07-07 10:57:28,973 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:29,022 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-07-07 10:57:29,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:29,026 WARN L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-07 10:57:29,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 5 proven. 134 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-07-07 10:57:30,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:30,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 44 [2020-07-07 10:57:30,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511857963] [2020-07-07 10:57:30,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-07 10:57:30,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:30,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-07 10:57:30,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2020-07-07 10:57:30,022 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 44 states. [2020-07-07 10:57:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:31,644 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-07-07 10:57:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 10:57:31,645 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 79 [2020-07-07 10:57:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:31,646 INFO L225 Difference]: With dead ends: 50 [2020-07-07 10:57:31,646 INFO L226 Difference]: Without dead ends: 46 [2020-07-07 10:57:31,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=234, Invalid=2958, Unknown=0, NotChecked=0, Total=3192 [2020-07-07 10:57:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-07 10:57:31,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-07 10:57:31,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-07 10:57:31,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-07-07 10:57:31,661 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 79 [2020-07-07 10:57:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:31,662 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-07-07 10:57:31,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-07 10:57:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-07-07 10:57:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-07 10:57:31,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:31,664 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:31,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-07 10:57:31,865 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:31,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:31,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 13 times [2020-07-07 10:57:31,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:31,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287524423] [2020-07-07 10:57:31,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-07 10:57:32,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287524423] [2020-07-07 10:57:32,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181375302] [2020-07-07 10:57:32,694 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,760 WARN L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 105 conjunts are in the unsatisfiable core [2020-07-07 10:57:32,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 37 proven. 104 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-07 10:57:34,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:34,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 49 [2020-07-07 10:57:34,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048275634] [2020-07-07 10:57:34,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-07 10:57:34,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:34,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-07 10:57:34,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2217, Unknown=0, NotChecked=0, Total=2352 [2020-07-07 10:57:34,086 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 49 states. [2020-07-07 10:57:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:36,212 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-07-07 10:57:36,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:57:36,213 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 72 [2020-07-07 10:57:36,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:36,214 INFO L225 Difference]: With dead ends: 53 [2020-07-07 10:57:36,214 INFO L226 Difference]: Without dead ends: 49 [2020-07-07 10:57:36,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=305, Invalid=3985, Unknown=0, NotChecked=0, Total=4290 [2020-07-07 10:57:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-07 10:57:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-07-07 10:57:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 10:57:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-07-07 10:57:36,225 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2020-07-07 10:57:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:36,225 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-07-07 10:57:36,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-07 10:57:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-07-07 10:57:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 10:57:36,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:36,227 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:36,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:36,443 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:36,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:36,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 14 times [2020-07-07 10:57:36,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:36,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351576302] [2020-07-07 10:57:36,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-07 10:57:37,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351576302] [2020-07-07 10:57:37,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587510220] [2020-07-07 10:57:37,359 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:37,412 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:57:37,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:37,415 WARN L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-07 10:57:37,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-07 10:57:38,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:38,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22] total 46 [2020-07-07 10:57:38,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298468154] [2020-07-07 10:57:38,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-07 10:57:38,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:38,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-07 10:57:38,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2020-07-07 10:57:38,835 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 46 states. [2020-07-07 10:57:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:40,713 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-07-07 10:57:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:57:40,714 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 79 [2020-07-07 10:57:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:40,715 INFO L225 Difference]: With dead ends: 55 [2020-07-07 10:57:40,715 INFO L226 Difference]: Without dead ends: 51 [2020-07-07 10:57:40,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2020-07-07 10:57:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-07 10:57:40,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-07-07 10:57:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 10:57:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-07-07 10:57:40,724 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2020-07-07 10:57:40,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:40,724 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-07-07 10:57:40,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-07 10:57:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-07-07 10:57:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-07 10:57:40,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:40,726 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:40,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-07 10:57:40,941 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:40,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 15 times [2020-07-07 10:57:40,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:40,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53427058] [2020-07-07 10:57:40,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-07 10:57:41,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53427058] [2020-07-07 10:57:41,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838685168] [2020-07-07 10:57:41,981 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:42,035 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-07-07 10:57:42,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:42,039 WARN L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-07 10:57:42,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 6 proven. 165 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-07-07 10:57:43,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:43,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22] total 48 [2020-07-07 10:57:43,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852256248] [2020-07-07 10:57:43,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-07 10:57:43,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:43,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-07 10:57:43,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2020-07-07 10:57:43,292 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 48 states. [2020-07-07 10:57:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:45,392 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-07-07 10:57:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:57:45,393 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 86 [2020-07-07 10:57:45,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:45,395 INFO L225 Difference]: With dead ends: 53 [2020-07-07 10:57:45,395 INFO L226 Difference]: Without dead ends: 49 [2020-07-07 10:57:45,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=262, Invalid=3644, Unknown=0, NotChecked=0, Total=3906 [2020-07-07 10:57:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-07 10:57:45,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-07 10:57:45,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-07 10:57:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-07-07 10:57:45,410 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2020-07-07 10:57:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:45,410 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-07-07 10:57:45,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-07 10:57:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-07-07 10:57:45,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-07 10:57:45,412 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:45,412 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:45,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-07 10:57:45,627 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:45,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:45,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1937884195, now seen corresponding path program 16 times [2020-07-07 10:57:45,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:45,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447498711] [2020-07-07 10:57:45,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-07 10:57:46,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447498711] [2020-07-07 10:57:46,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357120594] [2020-07-07 10:57:46,675 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:46,759 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:57:46,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:46,762 WARN L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-07 10:57:46,766 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 5 proven. 163 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2020-07-07 10:57:48,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:48,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20] total 46 [2020-07-07 10:57:48,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064178591] [2020-07-07 10:57:48,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-07 10:57:48,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:48,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-07 10:57:48,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1947, Unknown=0, NotChecked=0, Total=2070 [2020-07-07 10:57:48,268 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 46 states. [2020-07-07 10:57:50,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:50,294 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-07-07 10:57:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:57:50,295 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 86 [2020-07-07 10:57:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:50,297 INFO L225 Difference]: With dead ends: 55 [2020-07-07 10:57:50,297 INFO L226 Difference]: Without dead ends: 49 [2020-07-07 10:57:50,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2020-07-07 10:57:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-07 10:57:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-07-07 10:57:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 10:57:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-07-07 10:57:50,304 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 86 [2020-07-07 10:57:50,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:50,304 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-07-07 10:57:50,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-07 10:57:50,304 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-07-07 10:57:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-07 10:57:50,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:50,305 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:50,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-07 10:57:50,519 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:50,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:50,520 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 17 times [2020-07-07 10:57:50,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:50,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643680055] [2020-07-07 10:57:50,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-07 10:57:51,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643680055] [2020-07-07 10:57:51,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213274106] [2020-07-07 10:57:51,844 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:51,901 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-07-07 10:57:51,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:51,906 WARN L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-07 10:57:51,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 6 proven. 197 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-07 10:57:53,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:53,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22] total 50 [2020-07-07 10:57:53,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19320661] [2020-07-07 10:57:53,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-07 10:57:53,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:53,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-07 10:57:53,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2020-07-07 10:57:53,420 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 50 states. [2020-07-07 10:57:55,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:55,349 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-07-07 10:57:55,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:57:55,351 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 93 [2020-07-07 10:57:55,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:55,353 INFO L225 Difference]: With dead ends: 53 [2020-07-07 10:57:55,353 INFO L226 Difference]: Without dead ends: 49 [2020-07-07 10:57:55,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=270, Invalid=3890, Unknown=0, NotChecked=0, Total=4160 [2020-07-07 10:57:55,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-07 10:57:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-07 10:57:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-07 10:57:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-07-07 10:57:55,360 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 93 [2020-07-07 10:57:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:55,361 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-07-07 10:57:55,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-07 10:57:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-07-07 10:57:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 10:57:55,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:55,362 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:55,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:55,570 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:55,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 18 times [2020-07-07 10:57:55,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:55,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313018710] [2020-07-07 10:57:55,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-07 10:57:56,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313018710] [2020-07-07 10:57:56,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606047540] [2020-07-07 10:57:56,738 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:56,807 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-07-07 10:57:56,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:56,814 WARN L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 117 conjunts are in the unsatisfiable core [2020-07-07 10:57:56,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 42 proven. 131 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-07-07 10:57:58,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:58,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 53 [2020-07-07 10:57:58,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850700660] [2020-07-07 10:57:58,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-07 10:57:58,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:58,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-07 10:57:58,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2611, Unknown=0, NotChecked=0, Total=2756 [2020-07-07 10:57:58,596 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 53 states. [2020-07-07 10:58:01,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:01,133 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-07-07 10:58:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 10:58:01,134 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 79 [2020-07-07 10:58:01,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:01,136 INFO L225 Difference]: With dead ends: 56 [2020-07-07 10:58:01,136 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 10:58:01,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=337, Invalid=4775, Unknown=0, NotChecked=0, Total=5112 [2020-07-07 10:58:01,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 10:58:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-07-07 10:58:01,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 10:58:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-07 10:58:01,144 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2020-07-07 10:58:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:01,144 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-07 10:58:01,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-07 10:58:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-07 10:58:01,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-07 10:58:01,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:01,146 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:01,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:01,359 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:01,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:01,360 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 19 times [2020-07-07 10:58:01,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:01,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280943277] [2020-07-07 10:58:01,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-07 10:58:02,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280943277] [2020-07-07 10:58:02,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214836399] [2020-07-07 10:58:02,722 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:02,799 WARN L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-07 10:58:02,801 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-07-07 10:58:04,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:04,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24] total 50 [2020-07-07 10:58:04,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766387552] [2020-07-07 10:58:04,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-07 10:58:04,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:04,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-07 10:58:04,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2020-07-07 10:58:04,340 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 50 states. [2020-07-07 10:58:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:06,786 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-07-07 10:58:06,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 10:58:06,788 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 86 [2020-07-07 10:58:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:06,789 INFO L225 Difference]: With dead ends: 58 [2020-07-07 10:58:06,790 INFO L226 Difference]: Without dead ends: 54 [2020-07-07 10:58:06,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=282, Invalid=4140, Unknown=0, NotChecked=0, Total=4422 [2020-07-07 10:58:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-07 10:58:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-07-07 10:58:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 10:58:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-07 10:58:06,796 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2020-07-07 10:58:06,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:06,797 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-07 10:58:06,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-07 10:58:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-07 10:58:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-07 10:58:06,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:06,798 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:07,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-07 10:58:07,012 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:07,013 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 20 times [2020-07-07 10:58:07,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:07,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961889311] [2020-07-07 10:58:07,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-07 10:58:08,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961889311] [2020-07-07 10:58:08,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109978679] [2020-07-07 10:58:08,398 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:08,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:58:08,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:58:08,445 WARN L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-07 10:58:08,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 7 proven. 199 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-07-07 10:58:10,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:10,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24] total 52 [2020-07-07 10:58:10,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747878946] [2020-07-07 10:58:10,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-07 10:58:10,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:10,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-07 10:58:10,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2515, Unknown=0, NotChecked=0, Total=2652 [2020-07-07 10:58:10,210 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 52 states. [2020-07-07 10:58:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:12,747 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-07-07 10:58:12,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 10:58:12,750 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 93 [2020-07-07 10:58:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:12,751 INFO L225 Difference]: With dead ends: 58 [2020-07-07 10:58:12,751 INFO L226 Difference]: Without dead ends: 54 [2020-07-07 10:58:12,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=290, Invalid=4402, Unknown=0, NotChecked=0, Total=4692 [2020-07-07 10:58:12,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-07 10:58:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-07-07 10:58:12,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 10:58:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-07 10:58:12,758 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2020-07-07 10:58:12,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:12,759 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-07 10:58:12,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-07 10:58:12,759 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-07 10:58:12,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-07 10:58:12,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:12,760 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:12,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-07 10:58:12,966 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:12,966 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 21 times [2020-07-07 10:58:12,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:12,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333262358] [2020-07-07 10:58:12,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-07 10:58:14,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333262358] [2020-07-07 10:58:14,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592616009] [2020-07-07 10:58:14,675 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:14,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-07-07 10:58:14,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:58:14,739 WARN L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-07 10:58:14,744 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 15 proven. 227 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-07-07 10:58:16,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:16,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 24] total 54 [2020-07-07 10:58:16,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405866184] [2020-07-07 10:58:16,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-07 10:58:16,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:16,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-07 10:58:16,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2719, Unknown=0, NotChecked=0, Total=2862 [2020-07-07 10:58:16,584 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 54 states. [2020-07-07 10:58:19,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:19,288 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-07-07 10:58:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 10:58:19,288 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 100 [2020-07-07 10:58:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:19,290 INFO L225 Difference]: With dead ends: 56 [2020-07-07 10:58:19,291 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 10:58:19,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=298, Invalid=4672, Unknown=0, NotChecked=0, Total=4970 [2020-07-07 10:58:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 10:58:19,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-07-07 10:58:19,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-07 10:58:19,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-07-07 10:58:19,298 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 100 [2020-07-07 10:58:19,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:19,298 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-07-07 10:58:19,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-07 10:58:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-07-07 10:58:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-07 10:58:19,299 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:19,300 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:19,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:19,505 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:19,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash 572340508, now seen corresponding path program 22 times [2020-07-07 10:58:19,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:19,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726265427] [2020-07-07 10:58:19,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-07-07 10:58:20,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726265427] [2020-07-07 10:58:20,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52433311] [2020-07-07 10:58:20,454 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:20,501 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:58:20,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:58:20,504 WARN L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 93 conjunts are in the unsatisfiable core [2020-07-07 10:58:20,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-07-07 10:58:21,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:21,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2020-07-07 10:58:21,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473143336] [2020-07-07 10:58:21,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-07 10:58:21,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:21,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-07 10:58:21,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1849, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 10:58:21,810 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 45 states. [2020-07-07 10:58:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:23,450 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2020-07-07 10:58:23,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 10:58:23,451 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 65 [2020-07-07 10:58:23,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:23,453 INFO L225 Difference]: With dead ends: 56 [2020-07-07 10:58:23,453 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 10:58:23,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=269, Invalid=3037, Unknown=0, NotChecked=0, Total=3306 [2020-07-07 10:58:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 10:58:23,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-07-07 10:58:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 10:58:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 72 transitions. [2020-07-07 10:58:23,461 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 72 transitions. Word has length 65 [2020-07-07 10:58:23,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:23,461 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 72 transitions. [2020-07-07 10:58:23,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-07 10:58:23,462 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 72 transitions. [2020-07-07 10:58:23,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-07 10:58:23,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:23,463 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:23,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-07 10:58:23,677 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:23,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1159270008, now seen corresponding path program 23 times [2020-07-07 10:58:23,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:23,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90099390] [2020-07-07 10:58:23,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 198 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-07-07 10:58:24,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90099390] [2020-07-07 10:58:24,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530876392] [2020-07-07 10:58:24,448 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:24,536 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-07-07 10:58:24,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:58:24,541 WARN L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-07 10:58:24,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 5 proven. 195 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-07 10:58:25,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:25,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2020-07-07 10:58:25,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601254582] [2020-07-07 10:58:25,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-07 10:58:25,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:25,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-07 10:58:25,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 10:58:25,740 INFO L87 Difference]: Start difference. First operand 48 states and 72 transitions. Second operand 37 states. [2020-07-07 10:58:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:27,561 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2020-07-07 10:58:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:58:27,561 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 93 [2020-07-07 10:58:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:27,562 INFO L225 Difference]: With dead ends: 58 [2020-07-07 10:58:27,563 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 10:58:27,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=217, Invalid=2435, Unknown=0, NotChecked=0, Total=2652 [2020-07-07 10:58:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 10:58:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-07-07 10:58:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 10:58:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2020-07-07 10:58:27,571 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 93 [2020-07-07 10:58:27,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:27,573 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2020-07-07 10:58:27,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-07 10:58:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2020-07-07 10:58:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-07 10:58:27,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:27,574 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:27,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:27,788 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:27,788 INFO L82 PathProgramCache]: Analyzing trace with hash -793317021, now seen corresponding path program 24 times [2020-07-07 10:58:27,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:27,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390342656] [2020-07-07 10:58:27,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-07 10:58:29,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390342656] [2020-07-07 10:58:29,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929490992] [2020-07-07 10:58:29,427 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:29,499 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-07-07 10:58:29,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:58:29,505 WARN L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-07 10:58:29,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 6 proven. 232 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-07-07 10:58:31,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:31,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 22] total 52 [2020-07-07 10:58:31,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863287532] [2020-07-07 10:58:31,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-07 10:58:31,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:31,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-07 10:58:31,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2513, Unknown=0, NotChecked=0, Total=2652 [2020-07-07 10:58:31,365 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 52 states. [2020-07-07 10:58:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:33,980 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-07-07 10:58:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:58:33,981 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 100 [2020-07-07 10:58:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:33,983 INFO L225 Difference]: With dead ends: 56 [2020-07-07 10:58:33,983 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 10:58:33,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=278, Invalid=4144, Unknown=0, NotChecked=0, Total=4422 [2020-07-07 10:58:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 10:58:33,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-07-07 10:58:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 10:58:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-07 10:58:33,989 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 100 [2020-07-07 10:58:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:33,989 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-07 10:58:33,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-07 10:58:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-07 10:58:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-07 10:58:33,991 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:33,991 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:34,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-07 10:58:34,204 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:34,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash -787811522, now seen corresponding path program 25 times [2020-07-07 10:58:34,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:34,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815866587] [2020-07-07 10:58:34,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-07 10:58:36,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815866587] [2020-07-07 10:58:36,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047773381] [2020-07-07 10:58:36,363 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:36,428 WARN L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-07 10:58:36,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 7 proven. 272 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2020-07-07 10:58:38,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:38,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 24] total 56 [2020-07-07 10:58:38,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556363997] [2020-07-07 10:58:38,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-07 10:58:38,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:38,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-07 10:58:38,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2931, Unknown=0, NotChecked=0, Total=3080 [2020-07-07 10:58:38,519 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 56 states. [2020-07-07 10:58:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:41,408 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-07-07 10:58:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 10:58:41,410 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 107 [2020-07-07 10:58:41,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:41,411 INFO L225 Difference]: With dead ends: 56 [2020-07-07 10:58:41,411 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 10:58:41,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=306, Invalid=4950, Unknown=0, NotChecked=0, Total=5256 [2020-07-07 10:58:41,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 10:58:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-07-07 10:58:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-07 10:58:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-07-07 10:58:41,418 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 107 [2020-07-07 10:58:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:41,418 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-07-07 10:58:41,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-07 10:58:41,419 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-07-07 10:58:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-07 10:58:41,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:41,420 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:41,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-07 10:58:41,634 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:41,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1080603673, now seen corresponding path program 26 times [2020-07-07 10:58:41,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:41,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732290253] [2020-07-07 10:58:41,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-07 10:58:43,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732290253] [2020-07-07 10:58:43,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642819540] [2020-07-07 10:58:43,044 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:43,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:58:43,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:58:43,093 WARN L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 129 conjunts are in the unsatisfiable core [2020-07-07 10:58:43,095 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 47 proven. 161 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-07 10:58:45,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:45,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 57 [2020-07-07 10:58:45,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270713638] [2020-07-07 10:58:45,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-07 10:58:45,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:45,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-07 10:58:45,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3037, Unknown=0, NotChecked=0, Total=3192 [2020-07-07 10:58:45,563 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 57 states. [2020-07-07 10:58:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:49,137 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-07-07 10:58:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 10:58:49,139 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 86 [2020-07-07 10:58:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:49,140 INFO L225 Difference]: With dead ends: 59 [2020-07-07 10:58:49,140 INFO L226 Difference]: Without dead ends: 55 [2020-07-07 10:58:49,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=369, Invalid=5637, Unknown=0, NotChecked=0, Total=6006 [2020-07-07 10:58:49,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-07 10:58:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-07 10:58:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 10:58:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-07 10:58:49,148 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 86 [2020-07-07 10:58:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:49,148 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-07 10:58:49,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-07 10:58:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-07 10:58:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-07 10:58:49,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:49,150 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:49,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-07 10:58:49,365 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash 365189506, now seen corresponding path program 27 times [2020-07-07 10:58:49,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:49,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351694840] [2020-07-07 10:58:49,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-07 10:58:50,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351694840] [2020-07-07 10:58:50,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265737536] [2020-07-07 10:58:50,908 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:50,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-07-07 10:58:50,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:58:50,986 WARN L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 144 conjunts are in the unsatisfiable core [2020-07-07 10:58:50,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 22 proven. 209 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-07 10:58:53,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:53,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 56 [2020-07-07 10:58:53,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005488205] [2020-07-07 10:58:53,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-07 10:58:53,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:53,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-07 10:58:53,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2927, Unknown=0, NotChecked=0, Total=3080 [2020-07-07 10:58:53,700 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 56 states. [2020-07-07 10:58:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:57,516 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-07 10:58:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 10:58:57,516 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 93 [2020-07-07 10:58:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:57,517 INFO L225 Difference]: With dead ends: 61 [2020-07-07 10:58:57,518 INFO L226 Difference]: Without dead ends: 57 [2020-07-07 10:58:57,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=340, Invalid=5210, Unknown=0, NotChecked=0, Total=5550 [2020-07-07 10:58:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-07 10:58:57,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-07-07 10:58:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 10:58:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-07 10:58:57,523 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 93 [2020-07-07 10:58:57,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:57,524 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-07 10:58:57,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-07 10:58:57,524 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-07 10:58:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-07 10:58:57,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:57,524 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:57,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-07 10:58:57,726 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:57,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:57,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1104773667, now seen corresponding path program 28 times [2020-07-07 10:58:57,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:57,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669397395] [2020-07-07 10:58:57,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-07 10:58:59,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669397395] [2020-07-07 10:58:59,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206386226] [2020-07-07 10:58:59,625 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:59,676 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:58:59,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:58:59,680 WARN L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-07 10:58:59,683 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:59:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 236 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-07-07 10:59:02,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:59:02,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26] total 56 [2020-07-07 10:59:02,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792855126] [2020-07-07 10:59:02,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-07 10:59:02,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:59:02,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-07 10:59:02,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2933, Unknown=0, NotChecked=0, Total=3080 [2020-07-07 10:59:02,044 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 56 states. [2020-07-07 10:59:05,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:59:05,947 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-07 10:59:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 10:59:05,948 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 100 [2020-07-07 10:59:05,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:59:05,949 INFO L225 Difference]: With dead ends: 61 [2020-07-07 10:59:05,949 INFO L226 Difference]: Without dead ends: 57 [2020-07-07 10:59:05,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=318, Invalid=5232, Unknown=0, NotChecked=0, Total=5550 [2020-07-07 10:59:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-07 10:59:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-07-07 10:59:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 10:59:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-07 10:59:05,957 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 100 [2020-07-07 10:59:05,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:59:05,957 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-07 10:59:05,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-07 10:59:05,958 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-07 10:59:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-07 10:59:05,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:59:05,959 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:59:06,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:06,161 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:59:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:59:06,161 INFO L82 PathProgramCache]: Analyzing trace with hash 560522232, now seen corresponding path program 29 times [2020-07-07 10:59:06,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:59:06,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162564935] [2020-07-07 10:59:06,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:59:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-07 10:59:08,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162564935] [2020-07-07 10:59:08,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197213529] [2020-07-07 10:59:08,332 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:08,395 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-07-07 10:59:08,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:59:08,401 WARN L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-07 10:59:08,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:59:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 8 proven. 274 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2020-07-07 10:59:10,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:59:10,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 26] total 58 [2020-07-07 10:59:10,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687677029] [2020-07-07 10:59:10,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-07 10:59:10,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:59:10,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-07 10:59:10,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3153, Unknown=0, NotChecked=0, Total=3306 [2020-07-07 10:59:10,971 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 58 states. [2020-07-07 10:59:15,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:59:15,218 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-07 10:59:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 10:59:15,220 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 107 [2020-07-07 10:59:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:59:15,221 INFO L225 Difference]: With dead ends: 61 [2020-07-07 10:59:15,221 INFO L226 Difference]: Without dead ends: 57 [2020-07-07 10:59:15,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=326, Invalid=5526, Unknown=0, NotChecked=0, Total=5852 [2020-07-07 10:59:15,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-07 10:59:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-07-07 10:59:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 10:59:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-07 10:59:15,229 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 107 [2020-07-07 10:59:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:59:15,229 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-07 10:59:15,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-07 10:59:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-07 10:59:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-07 10:59:15,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:59:15,230 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:59:15,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:15,444 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:59:15,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:59:15,444 INFO L82 PathProgramCache]: Analyzing trace with hash -330893523, now seen corresponding path program 30 times [2020-07-07 10:59:15,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:59:15,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054121789] [2020-07-07 10:59:15,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:59:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-07 10:59:18,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054121789] [2020-07-07 10:59:18,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773026334] [2020-07-07 10:59:18,210 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:18,275 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-07-07 10:59:18,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:59:18,281 WARN L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-07 10:59:18,284 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:59:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 315 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2020-07-07 10:59:21,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:59:21,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26] total 60 [2020-07-07 10:59:21,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600243326] [2020-07-07 10:59:21,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-07 10:59:21,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:59:21,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-07 10:59:21,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3381, Unknown=0, NotChecked=0, Total=3540 [2020-07-07 10:59:21,145 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 60 states. [2020-07-07 10:59:25,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:59:25,965 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-07-07 10:59:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 10:59:25,967 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 114 [2020-07-07 10:59:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:59:25,968 INFO L225 Difference]: With dead ends: 59 [2020-07-07 10:59:25,968 INFO L226 Difference]: Without dead ends: 55 [2020-07-07 10:59:25,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=334, Invalid=5828, Unknown=0, NotChecked=0, Total=6162 [2020-07-07 10:59:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-07 10:59:25,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-07-07 10:59:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-07 10:59:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-07-07 10:59:25,975 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 114 [2020-07-07 10:59:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:59:25,975 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-07-07 10:59:25,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-07 10:59:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2020-07-07 10:59:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-07 10:59:25,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:59:25,976 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:59:26,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:26,190 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:59:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:59:26,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1343946330, now seen corresponding path program 31 times [2020-07-07 10:59:26,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:59:26,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642563997] [2020-07-07 10:59:26,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:59:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 215 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-07 10:59:27,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642563997] [2020-07-07 10:59:27,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143238469] [2020-07-07 10:59:27,893 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:27,939 WARN L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-07 10:59:27,942 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:59:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 4 proven. 199 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-07 10:59:29,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:59:29,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22] total 50 [2020-07-07 10:59:29,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756028358] [2020-07-07 10:59:29,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-07 10:59:29,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:59:29,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-07 10:59:29,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2020-07-07 10:59:29,979 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 50 states. [2020-07-07 10:59:33,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:59:33,766 INFO L93 Difference]: Finished difference Result 61 states and 87 transitions. [2020-07-07 10:59:33,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 10:59:33,769 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 93 [2020-07-07 10:59:33,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:59:33,771 INFO L225 Difference]: With dead ends: 61 [2020-07-07 10:59:33,771 INFO L226 Difference]: Without dead ends: 55 [2020-07-07 10:59:33,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=282, Invalid=4140, Unknown=0, NotChecked=0, Total=4422 [2020-07-07 10:59:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-07 10:59:33,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-07 10:59:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 10:59:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 73 transitions. [2020-07-07 10:59:33,779 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 73 transitions. Word has length 93 [2020-07-07 10:59:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:59:33,779 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 73 transitions. [2020-07-07 10:59:33,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-07 10:59:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 73 transitions. [2020-07-07 10:59:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-07 10:59:33,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:59:33,780 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:59:33,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-07 10:59:33,989 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:59:33,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:59:33,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1907807715, now seen corresponding path program 32 times [2020-07-07 10:59:33,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:59:33,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757628776] [2020-07-07 10:59:33,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:59:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-07 10:59:36,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757628776] [2020-07-07 10:59:36,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973180290] [2020-07-07 10:59:36,468 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:36,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:59:36,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:59:36,526 WARN L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-07 10:59:36,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:59:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 7 proven. 313 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-07-07 10:59:39,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:59:39,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 24] total 58 [2020-07-07 10:59:39,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735213483] [2020-07-07 10:59:39,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-07 10:59:39,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:59:39,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-07 10:59:39,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3151, Unknown=0, NotChecked=0, Total=3306 [2020-07-07 10:59:39,423 INFO L87 Difference]: Start difference. First operand 51 states and 73 transitions. Second operand 58 states. [2020-07-07 10:59:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:59:43,559 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-07-07 10:59:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 10:59:43,561 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2020-07-07 10:59:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:59:43,562 INFO L225 Difference]: With dead ends: 59 [2020-07-07 10:59:43,562 INFO L226 Difference]: Without dead ends: 55 [2020-07-07 10:59:43,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=314, Invalid=5236, Unknown=0, NotChecked=0, Total=5550 [2020-07-07 10:59:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-07 10:59:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-07 10:59:43,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 10:59:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-07 10:59:43,568 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 114 [2020-07-07 10:59:43,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:59:43,569 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-07 10:59:43,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-07 10:59:43,569 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-07 10:59:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-07 10:59:43,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:59:43,570 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:59:43,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:43,783 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:59:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:59:43,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1776686958, now seen corresponding path program 33 times [2020-07-07 10:59:43,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:59:43,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200923981] [2020-07-07 10:59:43,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:59:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-07 10:59:46,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200923981] [2020-07-07 10:59:46,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865608675] [2020-07-07 10:59:46,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:46,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-07-07 10:59:46,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:59:46,741 WARN L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-07 10:59:46,744 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:59:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 8 proven. 359 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2020-07-07 10:59:50,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:59:50,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 26] total 62 [2020-07-07 10:59:50,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438419085] [2020-07-07 10:59:50,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-07 10:59:50,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:59:50,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-07 10:59:50,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3617, Unknown=0, NotChecked=0, Total=3782 [2020-07-07 10:59:50,080 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 62 states. [2020-07-07 10:59:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:59:55,315 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-07-07 10:59:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 10:59:55,317 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2020-07-07 10:59:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:59:55,318 INFO L225 Difference]: With dead ends: 59 [2020-07-07 10:59:55,318 INFO L226 Difference]: Without dead ends: 55 [2020-07-07 10:59:55,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=342, Invalid=6138, Unknown=0, NotChecked=0, Total=6480 [2020-07-07 10:59:55,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-07 10:59:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-07-07 10:59:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-07 10:59:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-07-07 10:59:55,324 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 121 [2020-07-07 10:59:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:59:55,324 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-07-07 10:59:55,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-07 10:59:55,324 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2020-07-07 10:59:55,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-07 10:59:55,325 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:59:55,325 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:59:55,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-07 10:59:55,536 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:59:55,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:59:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash 183807880, now seen corresponding path program 34 times [2020-07-07 10:59:55,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:59:55,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925106322] [2020-07-07 10:59:55,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:59:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-07 10:59:57,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925106322] [2020-07-07 10:59:57,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84407395] [2020-07-07 10:59:57,446 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:57,488 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:59:57,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:59:57,491 WARN L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 141 conjunts are in the unsatisfiable core [2020-07-07 10:59:57,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:00:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 52 proven. 194 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-07 11:00:01,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:00:01,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 61 [2020-07-07 11:00:01,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445970206] [2020-07-07 11:00:01,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-07 11:00:01,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:00:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-07 11:00:01,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3495, Unknown=0, NotChecked=0, Total=3660 [2020-07-07 11:00:01,044 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 61 states. [2020-07-07 11:00:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:00:06,230 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-07-07 11:00:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:00:06,233 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 93 [2020-07-07 11:00:06,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:00:06,234 INFO L225 Difference]: With dead ends: 62 [2020-07-07 11:00:06,234 INFO L226 Difference]: Without dead ends: 58 [2020-07-07 11:00:06,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=401, Invalid=6571, Unknown=0, NotChecked=0, Total=6972 [2020-07-07 11:00:06,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-07 11:00:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-07-07 11:00:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:00:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-07 11:00:06,241 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 93 [2020-07-07 11:00:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:00:06,241 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-07 11:00:06,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-07 11:00:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-07 11:00:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-07 11:00:06,242 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:00:06,242 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:00:06,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:00:06,455 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:00:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:00:06,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1182847487, now seen corresponding path program 35 times [2020-07-07 11:00:06,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:00:06,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164734085] [2020-07-07 11:00:06,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:00:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-07 11:00:08,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164734085] [2020-07-07 11:00:08,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044130307] [2020-07-07 11:00:08,527 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:00:08,583 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-07-07 11:00:08,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:00:08,587 WARN L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-07 11:00:08,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:00:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 19 proven. 229 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-07-07 11:00:11,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:00:11,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28] total 58 [2020-07-07 11:00:11,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319207446] [2020-07-07 11:00:11,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-07 11:00:11,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:00:11,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-07 11:00:11,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3155, Unknown=0, NotChecked=0, Total=3306 [2020-07-07 11:00:11,592 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 58 states. [2020-07-07 11:00:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:00:16,741 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-07 11:00:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:00:16,744 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 100 [2020-07-07 11:00:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:00:16,745 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:00:16,745 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 11:00:16,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=338, Invalid=5824, Unknown=0, NotChecked=0, Total=6162 [2020-07-07 11:00:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 11:00:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-07 11:00:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:00:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-07 11:00:16,753 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 100 [2020-07-07 11:00:16,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:00:16,753 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-07 11:00:16,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-07 11:00:16,754 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-07 11:00:16,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-07 11:00:16,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:00:16,755 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:00:16,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-07 11:00:16,963 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:00:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:00:16,963 INFO L82 PathProgramCache]: Analyzing trace with hash -865344962, now seen corresponding path program 36 times [2020-07-07 11:00:16,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:00:16,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601604849] [2020-07-07 11:00:16,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:00:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-07 11:00:19,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601604849] [2020-07-07 11:00:19,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261966249] [2020-07-07 11:00:19,491 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:00:19,550 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-07-07 11:00:19,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:00:19,555 WARN L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-07 11:00:19,557 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:00:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 9 proven. 276 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2020-07-07 11:00:22,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:00:22,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 28] total 60 [2020-07-07 11:00:22,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197240892] [2020-07-07 11:00:22,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-07 11:00:22,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:00:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-07 11:00:22,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3383, Unknown=0, NotChecked=0, Total=3540 [2020-07-07 11:00:22,855 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 60 states. [2020-07-07 11:00:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:00:27,910 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-07 11:00:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:00:27,913 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 107 [2020-07-07 11:00:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:00:27,914 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:00:27,914 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 11:00:27,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=346, Invalid=6134, Unknown=0, NotChecked=0, Total=6480 [2020-07-07 11:00:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 11:00:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-07 11:00:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:00:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-07 11:00:27,920 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 107 [2020-07-07 11:00:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:00:27,920 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-07 11:00:27,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-07 11:00:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-07 11:00:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-07 11:00:27,921 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:00:27,921 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:00:28,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-07 11:00:28,123 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:00:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:00:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash -564676919, now seen corresponding path program 37 times [2020-07-07 11:00:28,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:00:28,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532815274] [2020-07-07 11:00:28,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:00:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-07 11:00:31,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532815274] [2020-07-07 11:00:31,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564157670] [2020-07-07 11:00:31,117 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:00:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:31,173 WARN L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-07 11:00:31,176 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:00:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 9 proven. 317 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2020-07-07 11:00:34,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:00:34,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 28] total 62 [2020-07-07 11:00:34,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211228765] [2020-07-07 11:00:34,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-07 11:00:34,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:00:34,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-07 11:00:34,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3619, Unknown=0, NotChecked=0, Total=3782 [2020-07-07 11:00:34,975 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 62 states. [2020-07-07 11:00:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:00:40,744 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-07 11:00:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:00:40,747 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 114 [2020-07-07 11:00:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:00:40,748 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:00:40,748 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 11:00:40,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=354, Invalid=6452, Unknown=0, NotChecked=0, Total=6806 [2020-07-07 11:00:40,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 11:00:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-07 11:00:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:00:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-07 11:00:40,756 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 114 [2020-07-07 11:00:40,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:00:40,756 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-07 11:00:40,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-07 11:00:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-07 11:00:40,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-07 11:00:40,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:00:40,757 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:00:40,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-07 11:00:40,976 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:00:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:00:40,977 INFO L82 PathProgramCache]: Analyzing trace with hash -173240844, now seen corresponding path program 38 times [2020-07-07 11:00:40,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:00:40,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102900677] [2020-07-07 11:00:40,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:00:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-07 11:00:44,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102900677] [2020-07-07 11:00:44,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648354607] [2020-07-07 11:00:44,367 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:00:44,424 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:00:44,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:00:44,428 WARN L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-07 11:00:44,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:00:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 9 proven. 361 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-07-07 11:00:48,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:00:48,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 28] total 64 [2020-07-07 11:00:48,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734840029] [2020-07-07 11:00:48,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-07 11:00:48,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:00:48,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-07 11:00:48,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3863, Unknown=0, NotChecked=0, Total=4032 [2020-07-07 11:00:48,616 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 64 states. [2020-07-07 11:00:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:00:54,803 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-07 11:00:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:00:54,806 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 121 [2020-07-07 11:00:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:00:54,807 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:00:54,807 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 11:00:54,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=362, Invalid=6778, Unknown=0, NotChecked=0, Total=7140 [2020-07-07 11:00:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 11:00:54,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-07 11:00:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:00:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-07 11:00:54,813 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 121 [2020-07-07 11:00:54,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:00:54,814 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-07 11:00:54,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-07 11:00:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-07 11:00:54,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-07 11:00:54,815 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:00:54,815 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:00:55,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-07 11:00:55,030 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:00:55,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:00:55,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1022743187, now seen corresponding path program 39 times [2020-07-07 11:00:55,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:00:55,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402815655] [2020-07-07 11:00:55,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:00:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-07-07 11:00:58,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402815655] [2020-07-07 11:00:58,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305174045] [2020-07-07 11:00:58,933 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:00:59,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-07-07 11:00:59,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:00:59,008 WARN L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-07 11:00:59,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:01:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 9 proven. 408 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-07 11:01:03,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:01:03,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 28] total 66 [2020-07-07 11:01:03,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488177272] [2020-07-07 11:01:03,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-07 11:01:03,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:01:03,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-07 11:01:03,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4115, Unknown=0, NotChecked=0, Total=4290 [2020-07-07 11:01:03,945 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 66 states. [2020-07-07 11:01:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:01:11,602 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-07-07 11:01:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:01:11,604 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 128 [2020-07-07 11:01:11,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:01:11,606 INFO L225 Difference]: With dead ends: 62 [2020-07-07 11:01:11,606 INFO L226 Difference]: Without dead ends: 58 [2020-07-07 11:01:11,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=370, Invalid=7112, Unknown=0, NotChecked=0, Total=7482 [2020-07-07 11:01:11,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-07 11:01:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-07-07 11:01:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 11:01:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2020-07-07 11:01:11,612 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 128 [2020-07-07 11:01:11,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:01:11,612 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2020-07-07 11:01:11,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-07 11:01:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2020-07-07 11:01:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-07 11:01:11,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:01:11,613 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:01:11,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:01:11,825 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:01:11,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:01:11,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1134604024, now seen corresponding path program 40 times [2020-07-07 11:01:11,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:01:11,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415857988] [2020-07-07 11:01:11,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:01:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 215 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-07 11:01:14,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415857988] [2020-07-07 11:01:14,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774070730] [2020-07-07 11:01:14,137 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:01:14,180 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:01:14,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:01:14,184 WARN L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-07 11:01:14,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:01:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 3 proven. 203 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-07-07 11:01:17,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:01:17,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24] total 52 [2020-07-07 11:01:17,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68018939] [2020-07-07 11:01:17,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-07 11:01:17,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:01:17,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-07 11:01:17,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2515, Unknown=0, NotChecked=0, Total=2652 [2020-07-07 11:01:17,112 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 52 states. [2020-07-07 11:01:22,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:01:22,104 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2020-07-07 11:01:22,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 11:01:22,107 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 93 [2020-07-07 11:01:22,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:01:22,108 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:01:22,108 INFO L226 Difference]: Without dead ends: 58 [2020-07-07 11:01:22,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=302, Invalid=4668, Unknown=0, NotChecked=0, Total=4970 [2020-07-07 11:01:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-07 11:01:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-07-07 11:01:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:01:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2020-07-07 11:01:22,122 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 93 [2020-07-07 11:01:22,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:01:22,123 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2020-07-07 11:01:22,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-07 11:01:22,123 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2020-07-07 11:01:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-07 11:01:22,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:01:22,124 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:01:22,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-07-07 11:01:22,325 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:01:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:01:22,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1339978551, now seen corresponding path program 41 times [2020-07-07 11:01:22,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:01:22,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793887180] [2020-07-07 11:01:22,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:01:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-07-07 11:01:26,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793887180] [2020-07-07 11:01:26,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491672503] [2020-07-07 11:01:26,362 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:01:26,430 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-07-07 11:01:26,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:01:26,436 WARN L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-07 11:01:26,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:01:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 8 proven. 406 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-07-07 11:01:31,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:01:31,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 26] total 64 [2020-07-07 11:01:31,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248391673] [2020-07-07 11:01:31,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-07 11:01:31,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:01:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-07 11:01:31,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3861, Unknown=0, NotChecked=0, Total=4032 [2020-07-07 11:01:31,858 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand 64 states. [2020-07-07 11:01:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:01:38,874 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-07-07 11:01:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 11:01:38,878 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 128 [2020-07-07 11:01:38,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:01:38,879 INFO L225 Difference]: With dead ends: 62 [2020-07-07 11:01:38,879 INFO L226 Difference]: Without dead ends: 58 [2020-07-07 11:01:38,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=350, Invalid=6456, Unknown=0, NotChecked=0, Total=6806 [2020-07-07 11:01:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-07 11:01:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-07-07 11:01:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:01:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-07 11:01:38,898 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 128 [2020-07-07 11:01:38,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:01:38,899 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-07 11:01:38,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-07 11:01:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-07 11:01:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-07 11:01:38,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:01:38,903 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:01:39,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:01:39,117 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:01:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:01:39,117 INFO L82 PathProgramCache]: Analyzing trace with hash -893562198, now seen corresponding path program 42 times [2020-07-07 11:01:39,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:01:39,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820331188] [2020-07-07 11:01:39,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:01:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-07-07 11:01:43,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820331188] [2020-07-07 11:01:43,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62192025] [2020-07-07 11:01:43,687 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:01:43,762 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-07-07 11:01:43,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:01:43,768 WARN L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-07 11:01:43,771 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:01:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 9 proven. 458 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2020-07-07 11:01:49,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:01:49,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 28] total 68 [2020-07-07 11:01:49,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664910262] [2020-07-07 11:01:49,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-07 11:01:49,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:01:49,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-07 11:01:49,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=4375, Unknown=0, NotChecked=0, Total=4556 [2020-07-07 11:01:49,531 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 68 states. [2020-07-07 11:01:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:01:58,698 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-07-07 11:01:58,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:01:58,702 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 135 [2020-07-07 11:01:58,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:01:58,703 INFO L225 Difference]: With dead ends: 62 [2020-07-07 11:01:58,703 INFO L226 Difference]: Without dead ends: 58 [2020-07-07 11:01:58,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=378, Invalid=7454, Unknown=0, NotChecked=0, Total=7832 [2020-07-07 11:01:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-07 11:01:58,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-07-07 11:01:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 11:01:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2020-07-07 11:01:58,720 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 135 [2020-07-07 11:01:58,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:01:58,721 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2020-07-07 11:01:58,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-07 11:01:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2020-07-07 11:01:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-07 11:01:58,722 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:01:58,722 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:01:58,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:01:58,935 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:01:58,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:01:58,935 INFO L82 PathProgramCache]: Analyzing trace with hash -992427037, now seen corresponding path program 43 times [2020-07-07 11:01:58,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:01:58,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484025812] [2020-07-07 11:01:58,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:01:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-07 11:02:02,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484025812] [2020-07-07 11:02:02,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863885555] [2020-07-07 11:02:02,099 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:02:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:02,154 WARN L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 153 conjunts are in the unsatisfiable core [2020-07-07 11:02:02,157 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:02:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 57 proven. 230 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-07-07 11:02:08,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:02:08,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 65 [2020-07-07 11:02:08,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969090152] [2020-07-07 11:02:08,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-07 11:02:08,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:02:08,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-07 11:02:08,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3985, Unknown=0, NotChecked=0, Total=4160 [2020-07-07 11:02:08,009 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 65 states. [2020-07-07 11:02:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:02:17,137 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2020-07-07 11:02:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 11:02:17,142 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 100 [2020-07-07 11:02:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:02:17,143 INFO L225 Difference]: With dead ends: 65 [2020-07-07 11:02:17,143 INFO L226 Difference]: Without dead ends: 61 [2020-07-07 11:02:17,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=433, Invalid=7577, Unknown=0, NotChecked=0, Total=8010 [2020-07-07 11:02:17,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-07 11:02:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-07 11:02:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:02:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-07 11:02:17,150 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 100 [2020-07-07 11:02:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:02:17,151 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-07 11:02:17,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-07 11:02:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-07 11:02:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-07 11:02:17,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:02:17,152 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:02:17,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-07-07 11:02:17,366 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:02:17,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:02:17,367 INFO L82 PathProgramCache]: Analyzing trace with hash -445760116, now seen corresponding path program 44 times [2020-07-07 11:02:17,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:02:17,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348235823] [2020-07-07 11:02:17,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:02:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-07 11:02:20,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348235823] [2020-07-07 11:02:20,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139869116] [2020-07-07 11:02:20,901 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:02:20,952 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:02:20,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:02:20,955 WARN L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-07 11:02:20,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:02:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 10 proven. 278 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-07 11:02:26,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:02:26,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 30] total 62 [2020-07-07 11:02:26,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319366853] [2020-07-07 11:02:26,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-07 11:02:26,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:02:26,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-07 11:02:26,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3621, Unknown=0, NotChecked=0, Total=3782 [2020-07-07 11:02:26,614 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 62 states. [2020-07-07 11:02:35,869 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-07-07 11:02:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:02:36,117 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-07 11:02:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 11:02:36,122 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 107 [2020-07-07 11:02:36,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:02:36,124 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:02:36,124 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:02:36,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=366, Invalid=6774, Unknown=0, NotChecked=0, Total=7140 [2020-07-07 11:02:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:02:36,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-07 11:02:36,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:02:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-07 11:02:36,131 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 107 [2020-07-07 11:02:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:02:36,131 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-07 11:02:36,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-07 11:02:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-07 11:02:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-07 11:02:36,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:02:36,133 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:02:36,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-07-07 11:02:36,348 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:02:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:02:36,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1805961107, now seen corresponding path program 45 times [2020-07-07 11:02:36,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:02:36,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428781919] [2020-07-07 11:02:36,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:02:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-07 11:02:40,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428781919] [2020-07-07 11:02:40,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352241782] [2020-07-07 11:02:40,362 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:02:40,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-07-07 11:02:40,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:02:40,439 WARN L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 180 conjunts are in the unsatisfiable core [2020-07-07 11:02:40,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:02:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 28 proven. 329 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-07-07 11:02:47,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:02:47,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 66 [2020-07-07 11:02:47,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079361293] [2020-07-07 11:02:47,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-07 11:02:47,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:02:47,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-07 11:02:47,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=4111, Unknown=0, NotChecked=0, Total=4290 [2020-07-07 11:02:47,949 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 66 states. [2020-07-07 11:02:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:02:57,232 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-07 11:02:57,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 11:02:57,237 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 114 [2020-07-07 11:02:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:02:57,238 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:02:57,239 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:02:57,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=408, Invalid=7424, Unknown=0, NotChecked=0, Total=7832 [2020-07-07 11:02:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:02:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-07 11:02:57,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:02:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-07 11:02:57,245 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 114 [2020-07-07 11:02:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:02:57,246 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-07 11:02:57,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-07 11:02:57,246 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-07 11:02:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-07 11:02:57,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:02:57,247 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:02:57,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-07-07 11:02:57,461 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:02:57,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:02:57,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1954300290, now seen corresponding path program 46 times [2020-07-07 11:02:57,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:02:57,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036785647] [2020-07-07 11:02:57,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:02:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-07 11:03:01,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036785647] [2020-07-07 11:03:01,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034551468] [2020-07-07 11:03:01,818 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:03:01,880 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:03:01,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:03:01,885 WARN L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-07 11:03:01,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:03:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 10 proven. 363 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2020-07-07 11:03:08,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:03:08,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 30] total 66 [2020-07-07 11:03:08,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389522293] [2020-07-07 11:03:08,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-07 11:03:08,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:03:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-07 11:03:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=4117, Unknown=0, NotChecked=0, Total=4290 [2020-07-07 11:03:08,745 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 66 states. [2020-07-07 11:03:19,541 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-07 11:03:20,172 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-07 11:03:22,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:03:22,036 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-07 11:03:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 11:03:22,043 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 121 [2020-07-07 11:03:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:03:22,045 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:03:22,045 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:03:22,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=382, Invalid=7450, Unknown=0, NotChecked=0, Total=7832 [2020-07-07 11:03:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:03:22,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-07 11:03:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:03:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-07 11:03:22,051 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 121 [2020-07-07 11:03:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:03:22,052 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-07 11:03:22,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-07 11:03:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-07 11:03:22,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-07 11:03:22,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:03:22,053 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:03:22,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:03:22,266 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:03:22,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:03:22,267 INFO L82 PathProgramCache]: Analyzing trace with hash -970320905, now seen corresponding path program 47 times [2020-07-07 11:03:22,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:03:22,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252859111] [2020-07-07 11:03:22,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:03:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-07-07 11:03:29,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252859111] [2020-07-07 11:03:29,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219323510] [2020-07-07 11:03:29,654 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:03:29,735 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-07-07 11:03:29,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:03:29,742 WARN L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-07 11:03:29,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:03:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 10 proven. 410 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2020-07-07 11:03:40,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:03:40,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 30] total 68 [2020-07-07 11:03:40,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672122147] [2020-07-07 11:03:40,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-07 11:03:40,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:03:40,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-07 11:03:40,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=4377, Unknown=0, NotChecked=0, Total=4556 [2020-07-07 11:03:40,098 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 68 states. [2020-07-07 11:03:51,806 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:03:54,840 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-07 11:03:55,291 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-07 11:03:55,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:03:55,710 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-07 11:03:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 11:03:55,717 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 128 [2020-07-07 11:03:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:03:55,718 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:03:55,719 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:03:55,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=390, Invalid=7800, Unknown=0, NotChecked=0, Total=8190 [2020-07-07 11:03:55,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:03:55,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-07 11:03:55,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:03:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-07 11:03:55,731 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 128 [2020-07-07 11:03:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:03:55,731 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-07 11:03:55,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-07 11:03:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-07 11:03:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-07 11:03:55,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:03:55,733 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:03:55,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-07-07 11:03:55,946 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:03:55,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:03:55,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1081659784, now seen corresponding path program 48 times [2020-07-07 11:03:55,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:03:55,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218891972] [2020-07-07 11:03:55,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:03:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-07-07 11:04:02,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218891972] [2020-07-07 11:04:02,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223540654] [2020-07-07 11:04:02,835 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:04:02,917 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-07-07 11:04:02,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:04:02,923 WARN L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-07 11:04:02,926 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:04:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 10 proven. 460 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-07-07 11:04:13,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:04:13,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 30] total 70 [2020-07-07 11:04:13,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152067894] [2020-07-07 11:04:13,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-07 11:04:13,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:04:13,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-07 11:04:13,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=4645, Unknown=0, NotChecked=0, Total=4830 [2020-07-07 11:04:13,781 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 70 states. [2020-07-07 11:04:17,171 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-07 11:04:17,817 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:04:18,982 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:04:19,597 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:04:21,873 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:04:25,021 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:04:32,286 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-07 11:04:32,846 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-07 11:04:33,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:04:33,299 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-07 11:04:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 11:04:33,304 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 135 [2020-07-07 11:04:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:04:33,305 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:04:33,305 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:04:33,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=398, Invalid=8158, Unknown=0, NotChecked=0, Total=8556 [2020-07-07 11:04:33,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:04:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-07 11:04:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:04:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-07 11:04:33,312 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 135 [2020-07-07 11:04:33,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:04:33,313 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-07 11:04:33,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-07 11:04:33,313 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-07 11:04:33,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-07 11:04:33,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:04:33,314 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:04:33,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-07-07 11:04:33,527 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:04:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:04:33,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1602926209, now seen corresponding path program 49 times [2020-07-07 11:04:33,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:04:33,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385787295] [2020-07-07 11:04:33,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:04:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-07-07 11:04:41,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385787295] [2020-07-07 11:04:41,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590717193] [2020-07-07 11:04:41,881 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:04:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:41,956 WARN L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-07 11:04:41,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:04:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 10 proven. 513 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2020-07-07 11:04:52,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:04:52,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 30] total 72 [2020-07-07 11:04:52,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565089719] [2020-07-07 11:04:52,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-07 11:04:52,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:04:52,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-07 11:04:52,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4921, Unknown=0, NotChecked=0, Total=5112 [2020-07-07 11:04:52,709 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 72 states. [2020-07-07 11:05:06,966 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-07 11:05:07,636 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-07 11:05:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:05:08,839 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-07 11:05:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 11:05:08,846 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2020-07-07 11:05:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:05:08,847 INFO L225 Difference]: With dead ends: 65 [2020-07-07 11:05:08,847 INFO L226 Difference]: Without dead ends: 61 [2020-07-07 11:05:08,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=406, Invalid=8524, Unknown=0, NotChecked=0, Total=8930 [2020-07-07 11:05:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-07 11:05:08,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-07-07 11:05:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-07 11:05:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2020-07-07 11:05:08,854 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 142 [2020-07-07 11:05:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:05:08,854 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2020-07-07 11:05:08,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-07 11:05:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2020-07-07 11:05:08,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-07 11:05:08,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:05:08,856 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:05:09,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:05:09,062 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:05:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:05:09,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1116794993, now seen corresponding path program 50 times [2020-07-07 11:05:09,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:05:09,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978130150] [2020-07-07 11:05:09,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:05:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 46 proven. 338 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-07 11:05:15,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978130150] [2020-07-07 11:05:15,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197393028] [2020-07-07 11:05:15,074 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:05:15,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:05:15,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:05:15,134 WARN L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-07 11:05:15,137 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:05:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 5 proven. 318 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2020-07-07 11:05:22,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:05:22,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26] total 60 [2020-07-07 11:05:22,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792777474] [2020-07-07 11:05:22,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-07 11:05:22,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:05:22,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-07 11:05:22,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3381, Unknown=0, NotChecked=0, Total=3540 [2020-07-07 11:05:22,671 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 60 states. [2020-07-07 11:05:34,310 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-07 11:05:34,899 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-07 11:05:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:05:35,515 INFO L93 Difference]: Finished difference Result 67 states and 99 transitions. [2020-07-07 11:05:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:05:35,523 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 114 [2020-07-07 11:05:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:05:35,525 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:05:35,525 INFO L226 Difference]: Without dead ends: 61 [2020-07-07 11:05:35,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=346, Invalid=6134, Unknown=0, NotChecked=0, Total=6480 [2020-07-07 11:05:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-07 11:05:35,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-07 11:05:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:05:35,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2020-07-07 11:05:35,531 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 114 [2020-07-07 11:05:35,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:05:35,532 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2020-07-07 11:05:35,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-07 11:05:35,532 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2020-07-07 11:05:35,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-07 11:05:35,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:05:35,533 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:05:35,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-07-07 11:05:35,746 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:05:35,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:05:35,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1270577827, now seen corresponding path program 51 times [2020-07-07 11:05:35,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:05:35,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295903885] [2020-07-07 11:05:35,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:05:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:05:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-07-07 11:05:44,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295903885] [2020-07-07 11:05:44,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261308310] [2020-07-07 11:05:44,987 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:05:45,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-07-07 11:05:45,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:05:45,104 WARN L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-07 11:05:45,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:05:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 9 proven. 511 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-07 11:05:57,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:05:57,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 28] total 70 [2020-07-07 11:05:57,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470812497] [2020-07-07 11:05:57,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-07 11:05:57,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:05:57,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-07 11:05:57,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=4643, Unknown=0, NotChecked=0, Total=4830 [2020-07-07 11:05:57,580 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand 70 states. [2020-07-07 11:06:00,424 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-07 11:06:01,214 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:06:02,005 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:06:02,792 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:06:03,333 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:06:04,640 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:06:05,457 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:06:06,063 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:06:07,424 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:06:08,716 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:06:09,559 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:06:10,147 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:06:10,965 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:06:13,933 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-07 11:06:14,836 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-07 11:06:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:06:16,128 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2020-07-07 11:06:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:06:16,139 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 142 [2020-07-07 11:06:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:06:16,141 INFO L225 Difference]: With dead ends: 65 [2020-07-07 11:06:16,141 INFO L226 Difference]: Without dead ends: 61 [2020-07-07 11:06:16,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=386, Invalid=7804, Unknown=0, NotChecked=0, Total=8190 [2020-07-07 11:06:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-07 11:06:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-07 11:06:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:06:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-07 11:06:16,148 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 142 [2020-07-07 11:06:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:06:16,148 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-07 11:06:16,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-07 11:06:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-07 11:06:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-07 11:06:16,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:06:16,150 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:06:16,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:06:16,363 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:06:16,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:06:16,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1655069586, now seen corresponding path program 52 times [2020-07-07 11:06:16,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:06:16,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532306570] [2020-07-07 11:06:16,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:06:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 68 proven. 601 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2020-07-07 11:06:29,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532306570] [2020-07-07 11:06:29,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250461599] [2020-07-07 11:06:29,074 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:06:29,147 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:06:29,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:06:29,152 WARN L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 241 conjunts are in the unsatisfiable core [2020-07-07 11:06:29,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:06:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 10 proven. 569 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2020-07-07 11:06:45,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:06:45,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 30] total 74 [2020-07-07 11:06:45,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891783044] [2020-07-07 11:06:45,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-07-07 11:06:45,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:06:45,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-07-07 11:06:45,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=5205, Unknown=0, NotChecked=0, Total=5402 [2020-07-07 11:06:45,095 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 74 states. [2020-07-07 11:06:46,658 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-07-07 11:06:47,964 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-07 11:06:48,546 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-07 11:06:49,416 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-07 11:06:50,040 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:06:57,304 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:07:02,470 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-07 11:07:03,189 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-07 11:07:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:07:04,440 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-07 11:07:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 11:07:04,448 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 149 [2020-07-07 11:07:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:07:04,449 INFO L225 Difference]: With dead ends: 65 [2020-07-07 11:07:04,450 INFO L226 Difference]: Without dead ends: 61 [2020-07-07 11:07:04,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 163 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=414, Invalid=8898, Unknown=0, NotChecked=0, Total=9312 [2020-07-07 11:07:04,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-07 11:07:04,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-07-07 11:07:04,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-07 11:07:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2020-07-07 11:07:04,455 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 149 [2020-07-07 11:07:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:07:04,456 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2020-07-07 11:07:04,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-07-07 11:07:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2020-07-07 11:07:04,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-07 11:07:04,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:07:04,457 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:07:04,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-07-07 11:07:04,671 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:07:04,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:07:04,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1733939138, now seen corresponding path program 53 times [2020-07-07 11:07:04,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:07:04,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674675823] [2020-07-07 11:07:04,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:07:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-07 11:07:10,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674675823] [2020-07-07 11:07:10,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68424990] [2020-07-07 11:07:10,833 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:07:10,894 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-07-07 11:07:10,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:07:10,899 WARN L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 165 conjunts are in the unsatisfiable core [2020-07-07 11:07:10,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:07:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 62 proven. 269 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-07-07 11:07:25,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:07:25,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 69 [2020-07-07 11:07:25,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547392676] [2020-07-07 11:07:25,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-07 11:07:25,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:07:25,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-07 11:07:25,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=4507, Unknown=0, NotChecked=0, Total=4692 [2020-07-07 11:07:25,118 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 69 states. [2020-07-07 11:07:26,416 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-07-07 11:07:27,496 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-07 11:07:28,046 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-07 11:07:29,165 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-07 11:07:30,253 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:07:31,347 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:07:31,956 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:07:32,819 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:07:33,391 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:07:34,256 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:07:34,840 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:07:36,728 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:07:37,315 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:07:38,350 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:07:38,949 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:07:39,871 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:07:40,492 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:07:41,399 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:07:42,034 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:07:45,915 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2020-07-07 11:07:46,418 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-07-07 11:07:48,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:07:48,203 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2020-07-07 11:07:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-07 11:07:48,210 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 107 [2020-07-07 11:07:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:07:48,212 INFO L225 Difference]: With dead ends: 68 [2020-07-07 11:07:48,212 INFO L226 Difference]: Without dead ends: 64 [2020-07-07 11:07:48,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=465, Invalid=8655, Unknown=0, NotChecked=0, Total=9120 [2020-07-07 11:07:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-07 11:07:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-07-07 11:07:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 11:07:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-07 11:07:48,218 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 107 [2020-07-07 11:07:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:07:48,219 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-07 11:07:48,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-07 11:07:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-07 11:07:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-07 11:07:48,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:07:48,221 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:07:48,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-07-07 11:07:48,434 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:07:48,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:07:48,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1739770251, now seen corresponding path program 54 times [2020-07-07 11:07:48,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:07:48,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477962959] [2020-07-07 11:07:48,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:07:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-07 11:07:56,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477962959] [2020-07-07 11:07:56,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951683212] [2020-07-07 11:07:56,083 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:07:56,142 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-07-07 11:07:56,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:07:56,146 WARN L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-07 11:07:56,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:08:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 23 proven. 310 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2020-07-07 11:08:06,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:08:06,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32] total 66 [2020-07-07 11:08:06,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586505408] [2020-07-07 11:08:06,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-07 11:08:06,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:08:06,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-07 11:08:06,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4119, Unknown=0, NotChecked=0, Total=4290 [2020-07-07 11:08:06,912 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 66 states. [2020-07-07 11:08:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:08:24,069 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-07 11:08:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-07 11:08:24,078 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 114 [2020-07-07 11:08:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:08:24,079 INFO L225 Difference]: With dead ends: 70 [2020-07-07 11:08:24,080 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 11:08:24,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=394, Invalid=7796, Unknown=0, NotChecked=0, Total=8190 [2020-07-07 11:08:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 11:08:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-07 11:08:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 11:08:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-07 11:08:24,088 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 114 [2020-07-07 11:08:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:08:24,088 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-07 11:08:24,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-07 11:08:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-07 11:08:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-07 11:08:24,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:08:24,090 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:08:24,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:08:24,304 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:08:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:08:24,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1164219276, now seen corresponding path program 55 times [2020-07-07 11:08:24,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:08:24,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128948755] [2020-07-07 11:08:24,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:08:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-07 11:08:32,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128948755] [2020-07-07 11:08:32,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463153790] [2020-07-07 11:08:32,120 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:08:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:08:32,180 WARN L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-07 11:08:32,182 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:08:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 11 proven. 365 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-07-07 11:08:44,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:08:44,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 32] total 68 [2020-07-07 11:08:44,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822014133] [2020-07-07 11:08:44,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-07 11:08:44,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:08:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-07 11:08:44,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4379, Unknown=0, NotChecked=0, Total=4556 [2020-07-07 11:08:44,606 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 68 states. [2020-07-07 11:08:45,677 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-07-07 11:08:48,163 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:08:48,938 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:08:49,717 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:08:50,272 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:08:51,050 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:09:02,315 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-07 11:09:02,830 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-07 11:09:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:09:04,159 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-07 11:09:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-07 11:09:04,168 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 121 [2020-07-07 11:09:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:09:04,170 INFO L225 Difference]: With dead ends: 70 [2020-07-07 11:09:04,170 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 11:09:04,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=402, Invalid=8154, Unknown=0, NotChecked=0, Total=8556 [2020-07-07 11:09:04,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 11:09:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-07 11:09:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 11:09:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-07 11:09:04,178 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 121 [2020-07-07 11:09:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:09:04,178 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-07 11:09:04,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-07 11:09:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-07 11:09:04,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-07 11:09:04,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:09:04,179 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:09:04,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-07-07 11:09:04,394 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:09:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:09:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash 325513663, now seen corresponding path program 56 times [2020-07-07 11:09:04,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:09:04,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929704627] [2020-07-07 11:09:04,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:09:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-07-07 11:09:13,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929704627] [2020-07-07 11:09:13,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606270871] [2020-07-07 11:09:13,345 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:09:13,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:09:13,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:09:13,412 WARN L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-07 11:09:13,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:09:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 11 proven. 412 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2020-07-07 11:09:27,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:09:27,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 32] total 70 [2020-07-07 11:09:27,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223781785] [2020-07-07 11:09:27,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-07 11:09:27,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:09:27,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-07 11:09:27,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=4647, Unknown=0, NotChecked=0, Total=4830 [2020-07-07 11:09:27,744 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 70 states. [2020-07-07 11:09:29,899 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-07 11:09:30,533 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-07 11:09:31,463 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-07 11:09:32,197 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:09:33,379 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:09:34,017 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:09:36,702 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:09:37,726 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:09:38,324 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:09:39,139 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:09:39,703 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:09:40,659 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:09:41,316 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:09:42,294 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:09:42,980 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:09:44,073 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:09:44,677 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:09:45,477 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-07 11:09:46,027 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:09:47,860 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-07 11:09:48,733 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-07 11:09:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:09:50,612 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-07 11:09:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-07 11:09:50,623 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 128 [2020-07-07 11:09:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:09:50,624 INFO L225 Difference]: With dead ends: 70 [2020-07-07 11:09:50,624 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 11:09:50,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=410, Invalid=8520, Unknown=0, NotChecked=0, Total=8930 [2020-07-07 11:09:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 11:09:50,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-07 11:09:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 11:09:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-07 11:09:50,629 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 128 [2020-07-07 11:09:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:09:50,629 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-07 11:09:50,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-07 11:09:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-07 11:09:50,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-07 11:09:50,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:09:50,630 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:09:50,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:09:50,843 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:09:50,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:09:50,843 INFO L82 PathProgramCache]: Analyzing trace with hash 634544554, now seen corresponding path program 57 times [2020-07-07 11:09:50,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:09:50,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481243902] [2020-07-07 11:09:50,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:09:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-07-07 11:09:59,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481243902] [2020-07-07 11:09:59,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645161267] [2020-07-07 11:09:59,455 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:09:59,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-07-07 11:09:59,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:09:59,537 WARN L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-07 11:09:59,540 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 11 proven. 463 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2020-07-07 11:10:11,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:11,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 32] total 72 [2020-07-07 11:10:11,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991184510] [2020-07-07 11:10:11,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-07 11:10:11,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:11,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-07 11:10:11,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4923, Unknown=0, NotChecked=0, Total=5112 [2020-07-07 11:10:11,330 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 72 states. [2020-07-07 11:10:18,421 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:10:19,881 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-07 11:10:21,446 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13