/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 10:56:11,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 10:56:11,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 10:56:11,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 10:56:11,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 10:56:11,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 10:56:11,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 10:56:11,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 10:56:11,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 10:56:11,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 10:56:11,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 10:56:11,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 10:56:11,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 10:56:11,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 10:56:11,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 10:56:11,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 10:56:11,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 10:56:11,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 10:56:11,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 10:56:11,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 10:56:11,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 10:56:11,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 10:56:11,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 10:56:11,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 10:56:11,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 10:56:11,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 10:56:11,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 10:56:11,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 10:56:11,682 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 10:56:11,696 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 10:56:11,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 10:56:11,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 10:56:11,698 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 10:56:11,698 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 10:56:11,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 10:56:11,698 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 10:56:11,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 10:56:11,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 10:56:11,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 10:56:11,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 10:56:11,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 10:56:11,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 10:56:11,700 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 10:56:11,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 10:56:11,700 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 10:56:11,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 10:56:11,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 10:56:11,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 10:56:11,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 10:56:11,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 10:56:11,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 10:56:11,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 10:56:11,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 10:56:11,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 10:56:11,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 10:56:11,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 10:56:11,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 10:56:11,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 10:56:11,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 10:56:11,975 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 10:56:11,988 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 10:56:11,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 10:56:11,992 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 10:56:11,993 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 10:56:11,994 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-07 10:56:12,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a68fbbe0/d40f82d094744ed19001dbffd5083314/FLAGdee7a0eef [2020-07-07 10:56:12,512 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 10:56:12,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-07 10:56:12,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a68fbbe0/d40f82d094744ed19001dbffd5083314/FLAGdee7a0eef [2020-07-07 10:56:12,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a68fbbe0/d40f82d094744ed19001dbffd5083314 [2020-07-07 10:56:12,877 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 10:56:12,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 10:56:12,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:12,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 10:56:12,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 10:56:12,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:12" (1/1) ... [2020-07-07 10:56:12,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@523bd800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:12, skipping insertion in model container [2020-07-07 10:56:12,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:12" (1/1) ... [2020-07-07 10:56:12,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 10:56:12,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 10:56:13,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:13,179 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 10:56:13,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:13,325 INFO L208 MainTranslator]: Completed translation [2020-07-07 10:56:13,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:13 WrapperNode [2020-07-07 10:56:13,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:13,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 10:56:13,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 10:56:13,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 10:56:13,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:13" (1/1) ... [2020-07-07 10:56:13,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:13" (1/1) ... [2020-07-07 10:56:13,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:13" (1/1) ... [2020-07-07 10:56:13,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:13" (1/1) ... [2020-07-07 10:56:13,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:13" (1/1) ... [2020-07-07 10:56:13,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:13" (1/1) ... [2020-07-07 10:56:13,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:13" (1/1) ... [2020-07-07 10:56:13,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 10:56:13,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 10:56:13,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 10:56:13,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 10:56:13,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:13" (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 10:56:13,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 10:56:13,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 10:56:13,441 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 10:56:13,441 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-07 10:56:13,441 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-07 10:56:13,441 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-07 10:56:13,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 10:56:13,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 10:56:13,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 10:56:13,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-07 10:56:13,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 10:56:13,442 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-07 10:56:13,442 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-07 10:56:13,442 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-07 10:56:13,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 10:56:13,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 10:56:13,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 10:56:13,884 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 10:56:13,885 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 10:56:13,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:13 BoogieIcfgContainer [2020-07-07 10:56:13,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 10:56:13,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 10:56:13,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 10:56:13,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 10:56:13,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 10:56:12" (1/3) ... [2020-07-07 10:56:13,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a1f626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:13, skipping insertion in model container [2020-07-07 10:56:13,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:13" (2/3) ... [2020-07-07 10:56:13,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a1f626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:13, skipping insertion in model container [2020-07-07 10:56:13,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:13" (3/3) ... [2020-07-07 10:56:13,898 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-07-07 10:56:13,909 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 10:56:13,922 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 10:56:13,938 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 10:56:13,963 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 10:56:13,964 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 10:56:13,964 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 10:56:13,964 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 10:56:13,964 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 10:56:13,964 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 10:56:13,964 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 10:56:13,964 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 10:56:13,991 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-07 10:56:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-07 10:56:14,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:14,008 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:14,008 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:14,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-07 10:56:14,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:14,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683386603] [2020-07-07 10:56:14,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:14,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683386603] [2020-07-07 10:56:14,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894069710] [2020-07-07 10:56:14,386 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 10:56:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,464 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-07 10:56:14,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-07 10:56:14,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:14,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-07-07 10:56:14,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864798271] [2020-07-07 10:56:14,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 10:56:14,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:14,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 10:56:14,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 10:56:14,563 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-07-07 10:56:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:14,622 INFO L93 Difference]: Finished difference Result 118 states and 174 transitions. [2020-07-07 10:56:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 10:56:14,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-07-07 10:56:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:14,635 INFO L225 Difference]: With dead ends: 118 [2020-07-07 10:56:14,635 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 10:56:14,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 10:56:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 10:56:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-07 10:56:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 10:56:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2020-07-07 10:56:14,685 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 48 [2020-07-07 10:56:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:14,687 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2020-07-07 10:56:14,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 10:56:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2020-07-07 10:56:14,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-07 10:56:14,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:14,691 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:14,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-07 10:56:14,906 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:14,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:14,907 INFO L82 PathProgramCache]: Analyzing trace with hash -880454641, now seen corresponding path program 1 times [2020-07-07 10:56:14,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:14,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144533164] [2020-07-07 10:56:14,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:15,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144533164] [2020-07-07 10:56:15,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28920468] [2020-07-07 10:56:15,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,137 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 10:56:15,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-07 10:56:15,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:15,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-07-07 10:56:15,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972168300] [2020-07-07 10:56:15,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 10:56:15,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:15,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 10:56:15,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:56:15,193 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 4 states. [2020-07-07 10:56:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:15,240 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-07-07 10:56:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 10:56:15,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-07-07 10:56:15,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:15,249 INFO L225 Difference]: With dead ends: 64 [2020-07-07 10:56:15,249 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 10:56:15,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:56:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 10:56:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-07 10:56:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 10:56:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2020-07-07 10:56:15,268 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 50 [2020-07-07 10:56:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:15,269 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2020-07-07 10:56:15,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 10:56:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2020-07-07 10:56:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-07 10:56:15,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:15,273 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:15,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:15,474 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:15,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:15,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1901522995, now seen corresponding path program 1 times [2020-07-07 10:56:15,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:15,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163005199] [2020-07-07 10:56:15,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:15,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163005199] [2020-07-07 10:56:15,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505690777] [2020-07-07 10:56:15,592 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 10:56:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-07 10:56:15,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:15,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:15,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-07-07 10:56:15,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888532055] [2020-07-07 10:56:15,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 10:56:15,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:15,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 10:56:15,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-07 10:56:15,775 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2020-07-07 10:56:15,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:15,915 INFO L93 Difference]: Finished difference Result 89 states and 121 transitions. [2020-07-07 10:56:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 10:56:15,916 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-07-07 10:56:15,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:15,920 INFO L225 Difference]: With dead ends: 89 [2020-07-07 10:56:15,920 INFO L226 Difference]: Without dead ends: 79 [2020-07-07 10:56:15,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-07-07 10:56:15,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-07 10:56:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-07-07 10:56:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-07 10:56:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2020-07-07 10:56:15,936 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 50 [2020-07-07 10:56:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:15,936 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2020-07-07 10:56:15,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 10:56:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2020-07-07 10:56:15,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-07 10:56:15,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:15,939 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:16,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:16,155 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:16,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:16,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1643357557, now seen corresponding path program 1 times [2020-07-07 10:56:16,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:16,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180775257] [2020-07-07 10:56:16,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:16,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180775257] [2020-07-07 10:56:16,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249988458] [2020-07-07 10:56:16,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 10:56:16,342 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:16,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:16,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2020-07-07 10:56:16,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554143811] [2020-07-07 10:56:16,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 10:56:16,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:16,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 10:56:16,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-07 10:56:16,419 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand 7 states. [2020-07-07 10:56:16,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:16,501 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2020-07-07 10:56:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 10:56:16,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-07-07 10:56:16,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:16,503 INFO L225 Difference]: With dead ends: 75 [2020-07-07 10:56:16,504 INFO L226 Difference]: Without dead ends: 70 [2020-07-07 10:56:16,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-07 10:56:16,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-07 10:56:16,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-07-07 10:56:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-07 10:56:16,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2020-07-07 10:56:16,516 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 50 [2020-07-07 10:56:16,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:16,517 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2020-07-07 10:56:16,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 10:56:16,517 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2020-07-07 10:56:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-07 10:56:16,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:16,520 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:16,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:16,733 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1046629615, now seen corresponding path program 1 times [2020-07-07 10:56:16,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:16,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648037859] [2020-07-07 10:56:16,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:16,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648037859] [2020-07-07 10:56:16,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719726549] [2020-07-07 10:56:16,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,926 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 10:56:16,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-07 10:56:16,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:16,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2020-07-07 10:56:16,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991592551] [2020-07-07 10:56:16,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 10:56:16,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:16,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 10:56:16,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-07 10:56:16,968 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand 6 states. [2020-07-07 10:56:17,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:17,004 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2020-07-07 10:56:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 10:56:17,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-07-07 10:56:17,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:17,006 INFO L225 Difference]: With dead ends: 73 [2020-07-07 10:56:17,006 INFO L226 Difference]: Without dead ends: 67 [2020-07-07 10:56:17,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-07 10:56:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-07 10:56:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-07-07 10:56:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-07 10:56:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-07-07 10:56:17,016 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 52 [2020-07-07 10:56:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:17,017 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-07-07 10:56:17,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 10:56:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-07-07 10:56:17,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-07 10:56:17,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:17,019 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:17,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:17,233 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:17,234 INFO L82 PathProgramCache]: Analyzing trace with hash 989371313, now seen corresponding path program 1 times [2020-07-07 10:56:17,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:17,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466890601] [2020-07-07 10:56:17,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:17,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466890601] [2020-07-07 10:56:17,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133753572] [2020-07-07 10:56:17,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,342 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-07 10:56:17,344 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-07 10:56:17,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:17,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2020-07-07 10:56:17,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038187344] [2020-07-07 10:56:17,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 10:56:17,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 10:56:17,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-07 10:56:17,389 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 6 states. [2020-07-07 10:56:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:17,447 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2020-07-07 10:56:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 10:56:17,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-07-07 10:56:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:17,449 INFO L225 Difference]: With dead ends: 81 [2020-07-07 10:56:17,449 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 10:56:17,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-07 10:56:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 10:56:17,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-07-07 10:56:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-07 10:56:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2020-07-07 10:56:17,465 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 52 [2020-07-07 10:56:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:17,466 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2020-07-07 10:56:17,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 10:56:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2020-07-07 10:56:17,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-07 10:56:17,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:17,468 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:17,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:17,683 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:17,684 INFO L82 PathProgramCache]: Analyzing trace with hash -823640004, now seen corresponding path program 1 times [2020-07-07 10:56:17,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:17,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777898616] [2020-07-07 10:56:17,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:17,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777898616] [2020-07-07 10:56:17,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602590181] [2020-07-07 10:56:17,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 10:56:17,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 10:56:17,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:17,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10] total 12 [2020-07-07 10:56:17,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502597882] [2020-07-07 10:56:17,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 10:56:17,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:17,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 10:56:17,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-07 10:56:17,993 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand 12 states. [2020-07-07 10:56:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:18,445 INFO L93 Difference]: Finished difference Result 170 states and 241 transitions. [2020-07-07 10:56:18,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 10:56:18,445 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-07-07 10:56:18,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:18,451 INFO L225 Difference]: With dead ends: 170 [2020-07-07 10:56:18,451 INFO L226 Difference]: Without dead ends: 111 [2020-07-07 10:56:18,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-07-07 10:56:18,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-07-07 10:56:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-07-07 10:56:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-07 10:56:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 132 transitions. [2020-07-07 10:56:18,486 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 132 transitions. Word has length 54 [2020-07-07 10:56:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:18,486 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 132 transitions. [2020-07-07 10:56:18,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 10:56:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 132 transitions. [2020-07-07 10:56:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-07 10:56:18,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:18,489 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:18,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:18,691 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:18,691 INFO L82 PathProgramCache]: Analyzing trace with hash 37367501, now seen corresponding path program 1 times [2020-07-07 10:56:18,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:18,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214679069] [2020-07-07 10:56:18,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:18,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214679069] [2020-07-07 10:56:18,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067091449] [2020-07-07 10:56:18,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 10:56:18,833 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:18,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:18,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-07-07 10:56:18,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303098110] [2020-07-07 10:56:18,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 10:56:18,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:18,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 10:56:18,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:56:18,869 INFO L87 Difference]: Start difference. First operand 96 states and 132 transitions. Second operand 4 states. [2020-07-07 10:56:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:18,920 INFO L93 Difference]: Finished difference Result 185 states and 251 transitions. [2020-07-07 10:56:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 10:56:18,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-07-07 10:56:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:18,923 INFO L225 Difference]: With dead ends: 185 [2020-07-07 10:56:18,923 INFO L226 Difference]: Without dead ends: 105 [2020-07-07 10:56:18,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 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 10:56:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-07 10:56:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-07-07 10:56:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-07 10:56:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 142 transitions. [2020-07-07 10:56:18,948 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 142 transitions. Word has length 60 [2020-07-07 10:56:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:18,948 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 142 transitions. [2020-07-07 10:56:18,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 10:56:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 142 transitions. [2020-07-07 10:56:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-07 10:56:18,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:18,952 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:19,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-07-07 10:56:19,166 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:19,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash -611141874, now seen corresponding path program 1 times [2020-07-07 10:56:19,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:19,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002017411] [2020-07-07 10:56:19,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:19,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002017411] [2020-07-07 10:56:19,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328590505] [2020-07-07 10:56:19,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 10:56:19,387 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:19,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:19,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-07-07 10:56:19,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870903763] [2020-07-07 10:56:19,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 10:56:19,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:19,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 10:56:19,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-07 10:56:19,444 INFO L87 Difference]: Start difference. First operand 105 states and 142 transitions. Second operand 5 states. [2020-07-07 10:56:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:19,565 INFO L93 Difference]: Finished difference Result 214 states and 296 transitions. [2020-07-07 10:56:19,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 10:56:19,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-07-07 10:56:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:19,568 INFO L225 Difference]: With dead ends: 214 [2020-07-07 10:56:19,571 INFO L226 Difference]: Without dead ends: 128 [2020-07-07 10:56:19,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-07-07 10:56:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-07 10:56:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2020-07-07 10:56:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-07 10:56:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 152 transitions. [2020-07-07 10:56:19,593 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 152 transitions. Word has length 62 [2020-07-07 10:56:19,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:19,593 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 152 transitions. [2020-07-07 10:56:19,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 10:56:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 152 transitions. [2020-07-07 10:56:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-07 10:56:19,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:19,595 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:19,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:19,810 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:19,811 INFO L82 PathProgramCache]: Analyzing trace with hash -299422308, now seen corresponding path program 1 times [2020-07-07 10:56:19,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:19,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033156224] [2020-07-07 10:56:19,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:19,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033156224] [2020-07-07 10:56:19,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119960410] [2020-07-07 10:56:19,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 10:56:19,987 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:20,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:20,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-07 10:56:20,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915376943] [2020-07-07 10:56:20,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 10:56:20,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:20,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 10:56:20,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-07 10:56:20,023 INFO L87 Difference]: Start difference. First operand 111 states and 152 transitions. Second operand 8 states. [2020-07-07 10:56:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:20,148 INFO L93 Difference]: Finished difference Result 220 states and 309 transitions. [2020-07-07 10:56:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 10:56:20,149 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-07-07 10:56:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:20,151 INFO L225 Difference]: With dead ends: 220 [2020-07-07 10:56:20,151 INFO L226 Difference]: Without dead ends: 128 [2020-07-07 10:56:20,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-07-07 10:56:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-07 10:56:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2020-07-07 10:56:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-07 10:56:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2020-07-07 10:56:20,164 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 63 [2020-07-07 10:56:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:20,165 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2020-07-07 10:56:20,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 10:56:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2020-07-07 10:56:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-07 10:56:20,167 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:20,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:20,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:20,381 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:20,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:20,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2143601123, now seen corresponding path program 1 times [2020-07-07 10:56:20,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:20,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370574535] [2020-07-07 10:56:20,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:20,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370574535] [2020-07-07 10:56:20,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144071921] [2020-07-07 10:56:20,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-07 10:56:20,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:20,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:20,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-07 10:56:20,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941892852] [2020-07-07 10:56:20,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 10:56:20,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 10:56:20,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-07 10:56:20,614 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand 10 states. [2020-07-07 10:56:20,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:20,877 INFO L93 Difference]: Finished difference Result 240 states and 336 transitions. [2020-07-07 10:56:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 10:56:20,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-07-07 10:56:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:20,880 INFO L225 Difference]: With dead ends: 240 [2020-07-07 10:56:20,880 INFO L226 Difference]: Without dead ends: 141 [2020-07-07 10:56:20,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-07-07 10:56:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2020-07-07 10:56:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-07 10:56:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 170 transitions. [2020-07-07 10:56:20,893 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 170 transitions. Word has length 65 [2020-07-07 10:56:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:20,893 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 170 transitions. [2020-07-07 10:56:20,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 10:56:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 170 transitions. [2020-07-07 10:56:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-07 10:56:20,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:20,896 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:21,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-07 10:56:21,109 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:21,109 INFO L82 PathProgramCache]: Analyzing trace with hash -561018771, now seen corresponding path program 2 times [2020-07-07 10:56:21,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:21,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676388232] [2020-07-07 10:56:21,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:21,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676388232] [2020-07-07 10:56:21,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109241248] [2020-07-07 10:56:21,188 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 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 10:56:21,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:21,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:21,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 10:56:21,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:21,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:21,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-07 10:56:21,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980431027] [2020-07-07 10:56:21,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 10:56:21,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:21,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 10:56:21,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-07 10:56:21,405 INFO L87 Difference]: Start difference. First operand 123 states and 170 transitions. Second operand 10 states. [2020-07-07 10:56:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:21,533 INFO L93 Difference]: Finished difference Result 240 states and 338 transitions. [2020-07-07 10:56:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 10:56:21,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-07-07 10:56:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:21,536 INFO L225 Difference]: With dead ends: 240 [2020-07-07 10:56:21,536 INFO L226 Difference]: Without dead ends: 141 [2020-07-07 10:56:21,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-07-07 10:56:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-07-07 10:56:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 127. [2020-07-07 10:56:21,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-07 10:56:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2020-07-07 10:56:21,552 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 66 [2020-07-07 10:56:21,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:21,553 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2020-07-07 10:56:21,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 10:56:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2020-07-07 10:56:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-07 10:56:21,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:21,555 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:21,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:21,767 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:21,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:21,767 INFO L82 PathProgramCache]: Analyzing trace with hash -134731602, now seen corresponding path program 2 times [2020-07-07 10:56:21,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:21,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473360456] [2020-07-07 10:56:21,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:21,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473360456] [2020-07-07 10:56:21,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104849624] [2020-07-07 10:56:21,908 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 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 10:56:22,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:22,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:22,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-07 10:56:22,013 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:22,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:22,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-07 10:56:22,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519582994] [2020-07-07 10:56:22,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 10:56:22,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:22,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 10:56:22,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-07 10:56:22,089 INFO L87 Difference]: Start difference. First operand 127 states and 175 transitions. Second operand 12 states. [2020-07-07 10:56:22,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:22,391 INFO L93 Difference]: Finished difference Result 253 states and 354 transitions. [2020-07-07 10:56:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 10:56:22,392 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-07-07 10:56:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:22,393 INFO L225 Difference]: With dead ends: 253 [2020-07-07 10:56:22,394 INFO L226 Difference]: Without dead ends: 151 [2020-07-07 10:56:22,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-07-07 10:56:22,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-07 10:56:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 129. [2020-07-07 10:56:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-07 10:56:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 178 transitions. [2020-07-07 10:56:22,406 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 178 transitions. Word has length 68 [2020-07-07 10:56:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:22,406 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 178 transitions. [2020-07-07 10:56:22,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 10:56:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 178 transitions. [2020-07-07 10:56:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-07 10:56:22,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:22,409 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:22,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 10:56:22,615 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:22,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1584394236, now seen corresponding path program 3 times [2020-07-07 10:56:22,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:22,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427875962] [2020-07-07 10:56:22,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:22,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427875962] [2020-07-07 10:56:22,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909334426] [2020-07-07 10:56:22,710 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 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 10:56:22,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-07 10:56:22,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:22,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-07 10:56:22,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-07 10:56:22,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:22,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2020-07-07 10:56:22,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776089824] [2020-07-07 10:56:22,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 10:56:22,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:22,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 10:56:22,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:22,897 INFO L87 Difference]: Start difference. First operand 129 states and 178 transitions. Second operand 14 states. [2020-07-07 10:56:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:23,272 INFO L93 Difference]: Finished difference Result 295 states and 429 transitions. [2020-07-07 10:56:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 10:56:23,272 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-07-07 10:56:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:23,275 INFO L225 Difference]: With dead ends: 295 [2020-07-07 10:56:23,275 INFO L226 Difference]: Without dead ends: 193 [2020-07-07 10:56:23,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-07-07 10:56:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-07-07 10:56:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 160. [2020-07-07 10:56:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-07 10:56:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 228 transitions. [2020-07-07 10:56:23,301 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 228 transitions. Word has length 69 [2020-07-07 10:56:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:23,301 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 228 transitions. [2020-07-07 10:56:23,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 10:56:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 228 transitions. [2020-07-07 10:56:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-07 10:56:23,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:23,305 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:23,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:23,519 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:23,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:23,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1256997633, now seen corresponding path program 1 times [2020-07-07 10:56:23,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:23,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252229759] [2020-07-07 10:56:23,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:23,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252229759] [2020-07-07 10:56:23,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39359994] [2020-07-07 10:56:23,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,749 INFO L264 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-07 10:56:23,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:23,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:23,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-07 10:56:23,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711670346] [2020-07-07 10:56:23,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 10:56:23,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:23,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 10:56:23,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:23,833 INFO L87 Difference]: Start difference. First operand 160 states and 228 transitions. Second operand 14 states. [2020-07-07 10:56:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:24,146 INFO L93 Difference]: Finished difference Result 320 states and 464 transitions. [2020-07-07 10:56:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 10:56:24,147 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-07-07 10:56:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:24,149 INFO L225 Difference]: With dead ends: 320 [2020-07-07 10:56:24,149 INFO L226 Difference]: Without dead ends: 188 [2020-07-07 10:56:24,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-07-07 10:56:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-07 10:56:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 162. [2020-07-07 10:56:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-07 10:56:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 231 transitions. [2020-07-07 10:56:24,169 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 231 transitions. Word has length 71 [2020-07-07 10:56:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:24,170 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 231 transitions. [2020-07-07 10:56:24,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 10:56:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 231 transitions. [2020-07-07 10:56:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-07 10:56:24,172 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:24,172 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:24,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-07 10:56:24,388 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash 895090319, now seen corresponding path program 1 times [2020-07-07 10:56:24,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:24,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857105826] [2020-07-07 10:56:24,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:24,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857105826] [2020-07-07 10:56:24,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023379923] [2020-07-07 10:56:24,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 10:56:24,555 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:24,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:24,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-07 10:56:24,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311011408] [2020-07-07 10:56:24,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 10:56:24,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:24,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 10:56:24,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:24,618 INFO L87 Difference]: Start difference. First operand 162 states and 231 transitions. Second operand 14 states. [2020-07-07 10:56:24,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:24,819 INFO L93 Difference]: Finished difference Result 326 states and 484 transitions. [2020-07-07 10:56:24,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 10:56:24,820 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2020-07-07 10:56:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:24,822 INFO L225 Difference]: With dead ends: 326 [2020-07-07 10:56:24,822 INFO L226 Difference]: Without dead ends: 194 [2020-07-07 10:56:24,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-07-07 10:56:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-07 10:56:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 166. [2020-07-07 10:56:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-07 10:56:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 236 transitions. [2020-07-07 10:56:24,842 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 236 transitions. Word has length 72 [2020-07-07 10:56:24,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:24,843 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 236 transitions. [2020-07-07 10:56:24,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 10:56:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 236 transitions. [2020-07-07 10:56:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-07-07 10:56:24,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:24,845 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:25,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-07 10:56:25,060 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:25,060 INFO L82 PathProgramCache]: Analyzing trace with hash -664750384, now seen corresponding path program 2 times [2020-07-07 10:56:25,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:25,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178410078] [2020-07-07 10:56:25,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:25,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178410078] [2020-07-07 10:56:25,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624504460] [2020-07-07 10:56:25,264 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:25,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:25,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:25,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-07 10:56:25,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:25,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:25,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-07 10:56:25,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997256722] [2020-07-07 10:56:25,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 10:56:25,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:25,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 10:56:25,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-07-07 10:56:25,692 INFO L87 Difference]: Start difference. First operand 166 states and 236 transitions. Second operand 16 states. [2020-07-07 10:56:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:26,113 INFO L93 Difference]: Finished difference Result 333 states and 482 transitions. [2020-07-07 10:56:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 10:56:26,113 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-07-07 10:56:26,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:26,115 INFO L225 Difference]: With dead ends: 333 [2020-07-07 10:56:26,116 INFO L226 Difference]: Without dead ends: 198 [2020-07-07 10:56:26,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-07-07 10:56:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-07 10:56:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 168. [2020-07-07 10:56:26,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-07 10:56:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 239 transitions. [2020-07-07 10:56:26,140 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 239 transitions. Word has length 74 [2020-07-07 10:56:26,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:26,140 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 239 transitions. [2020-07-07 10:56:26,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 10:56:26,140 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 239 transitions. [2020-07-07 10:56:26,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-07 10:56:26,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:26,143 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:26,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-07 10:56:26,346 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:26,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2074885854, now seen corresponding path program 2 times [2020-07-07 10:56:26,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:26,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850688899] [2020-07-07 10:56:26,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:26,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850688899] [2020-07-07 10:56:26,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013377331] [2020-07-07 10:56:26,484 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 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 10:56:26,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:26,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:26,576 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 10:56:26,578 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:26,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:26,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-07 10:56:26,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176487835] [2020-07-07 10:56:26,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 10:56:26,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:26,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 10:56:26,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2020-07-07 10:56:26,659 INFO L87 Difference]: Start difference. First operand 168 states and 239 transitions. Second operand 16 states. [2020-07-07 10:56:26,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:26,853 INFO L93 Difference]: Finished difference Result 342 states and 510 transitions. [2020-07-07 10:56:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 10:56:26,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-07-07 10:56:26,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:26,856 INFO L225 Difference]: With dead ends: 342 [2020-07-07 10:56:26,857 INFO L226 Difference]: Without dead ends: 207 [2020-07-07 10:56:26,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=339, Unknown=0, NotChecked=0, Total=552 [2020-07-07 10:56:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-07 10:56:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 172. [2020-07-07 10:56:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-07 10:56:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 244 transitions. [2020-07-07 10:56:26,873 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 244 transitions. Word has length 75 [2020-07-07 10:56:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:26,873 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 244 transitions. [2020-07-07 10:56:26,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 10:56:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 244 transitions. [2020-07-07 10:56:26,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-07 10:56:26,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:26,876 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:27,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-07 10:56:27,090 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:27,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:27,090 INFO L82 PathProgramCache]: Analyzing trace with hash -752607393, now seen corresponding path program 3 times [2020-07-07 10:56:27,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:27,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635996112] [2020-07-07 10:56:27,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:27,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635996112] [2020-07-07 10:56:27,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423364686] [2020-07-07 10:56:27,274 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 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 10:56:27,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-07 10:56:27,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:27,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 10:56:27,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-07-07 10:56:27,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:27,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-07-07 10:56:27,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969125942] [2020-07-07 10:56:27,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 10:56:27,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:27,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 10:56:27,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-07-07 10:56:27,683 INFO L87 Difference]: Start difference. First operand 172 states and 244 transitions. Second operand 17 states. [2020-07-07 10:56:28,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:28,732 INFO L93 Difference]: Finished difference Result 340 states and 492 transitions. [2020-07-07 10:56:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-07 10:56:28,733 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-07-07 10:56:28,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:28,735 INFO L225 Difference]: With dead ends: 340 [2020-07-07 10:56:28,735 INFO L226 Difference]: Without dead ends: 201 [2020-07-07 10:56:28,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 10:56:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-07 10:56:28,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-07-07 10:56:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-07 10:56:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 214 transitions. [2020-07-07 10:56:28,759 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 214 transitions. Word has length 77 [2020-07-07 10:56:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:28,760 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 214 transitions. [2020-07-07 10:56:28,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 10:56:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 214 transitions. [2020-07-07 10:56:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 10:56:28,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:28,762 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:28,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:28,967 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:28,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:28,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1997634884, now seen corresponding path program 1 times [2020-07-07 10:56:28,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:28,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504080462] [2020-07-07 10:56:28,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:29,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504080462] [2020-07-07 10:56:29,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918641632] [2020-07-07 10:56:29,085 INFO L94 rtionOrderModulation]: Keeping assertion order 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 10:56:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-07 10:56:29,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:29,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:29,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-07 10:56:29,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327348495] [2020-07-07 10:56:29,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 10:56:29,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:29,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 10:56:29,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2020-07-07 10:56:29,221 INFO L87 Difference]: Start difference. First operand 156 states and 214 transitions. Second operand 18 states. [2020-07-07 10:56:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:29,477 INFO L93 Difference]: Finished difference Result 328 states and 465 transitions. [2020-07-07 10:56:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 10:56:29,478 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-07 10:56:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:29,480 INFO L225 Difference]: With dead ends: 328 [2020-07-07 10:56:29,483 INFO L226 Difference]: Without dead ends: 207 [2020-07-07 10:56:29,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=431, Unknown=0, NotChecked=0, Total=702 [2020-07-07 10:56:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-07 10:56:29,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 161. [2020-07-07 10:56:29,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-07 10:56:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 221 transitions. [2020-07-07 10:56:29,500 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 221 transitions. Word has length 79 [2020-07-07 10:56:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:29,500 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 221 transitions. [2020-07-07 10:56:29,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 10:56:29,501 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 221 transitions. [2020-07-07 10:56:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-07 10:56:29,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:29,503 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:29,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:29,716 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:29,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:29,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1850379747, now seen corresponding path program 1 times [2020-07-07 10:56:29,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:29,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342283735] [2020-07-07 10:56:29,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:29,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342283735] [2020-07-07 10:56:29,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750916867] [2020-07-07 10:56:29,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:56:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 10:56:29,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-07 10:56:30,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:30,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2020-07-07 10:56:30,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15730659] [2020-07-07 10:56:30,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 10:56:30,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:30,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 10:56:30,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-07-07 10:56:30,022 INFO L87 Difference]: Start difference. First operand 161 states and 221 transitions. Second operand 4 states. [2020-07-07 10:56:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:30,087 INFO L93 Difference]: Finished difference Result 273 states and 374 transitions. [2020-07-07 10:56:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 10:56:30,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-07-07 10:56:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:30,090 INFO L225 Difference]: With dead ends: 273 [2020-07-07 10:56:30,090 INFO L226 Difference]: Without dead ends: 165 [2020-07-07 10:56:30,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-07 10:56:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 151. [2020-07-07 10:56:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-07-07 10:56:30,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 200 transitions. [2020-07-07 10:56:30,102 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 200 transitions. Word has length 81 [2020-07-07 10:56:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:30,102 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 200 transitions. [2020-07-07 10:56:30,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 10:56:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 200 transitions. [2020-07-07 10:56:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-07 10:56:30,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:30,104 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:30,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-07 10:56:30,319 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash 825317405, now seen corresponding path program 1 times [2020-07-07 10:56:30,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:30,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177361265] [2020-07-07 10:56:30,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:30,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177361265] [2020-07-07 10:56:30,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127630652] [2020-07-07 10:56:30,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 10:56:30,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 10:56:30,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:30,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-07 10:56:30,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802919529] [2020-07-07 10:56:30,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 10:56:30,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:30,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 10:56:30,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-07-07 10:56:30,730 INFO L87 Difference]: Start difference. First operand 151 states and 200 transitions. Second operand 20 states. [2020-07-07 10:56:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:31,736 INFO L93 Difference]: Finished difference Result 313 states and 420 transitions. [2020-07-07 10:56:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 10:56:31,738 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 84 [2020-07-07 10:56:31,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:31,740 INFO L225 Difference]: With dead ends: 313 [2020-07-07 10:56:31,740 INFO L226 Difference]: Without dead ends: 199 [2020-07-07 10:56:31,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-07-07 10:56:31,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-07-07 10:56:31,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 153. [2020-07-07 10:56:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-07 10:56:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 203 transitions. [2020-07-07 10:56:31,761 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 203 transitions. Word has length 84 [2020-07-07 10:56:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:31,761 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 203 transitions. [2020-07-07 10:56:31,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 10:56:31,762 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 203 transitions. [2020-07-07 10:56:31,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-07 10:56:31,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:31,764 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:31,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:31,978 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:31,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:31,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1994914283, now seen corresponding path program 1 times [2020-07-07 10:56:31,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:31,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556945242] [2020-07-07 10:56:31,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 87 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:32,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556945242] [2020-07-07 10:56:32,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852354213] [2020-07-07 10:56:32,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 10:56:32,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 26 proven. 77 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 10:56:32,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:32,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-07 10:56:32,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203069121] [2020-07-07 10:56:32,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 10:56:32,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:32,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 10:56:32,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-07 10:56:32,283 INFO L87 Difference]: Start difference. First operand 153 states and 203 transitions. Second operand 20 states. [2020-07-07 10:56:32,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:32,578 INFO L93 Difference]: Finished difference Result 334 states and 467 transitions. [2020-07-07 10:56:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 10:56:32,578 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-07-07 10:56:32,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:32,581 INFO L225 Difference]: With dead ends: 334 [2020-07-07 10:56:32,581 INFO L226 Difference]: Without dead ends: 220 [2020-07-07 10:56:32,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=336, Invalid=534, Unknown=0, NotChecked=0, Total=870 [2020-07-07 10:56:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-07-07 10:56:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 157. [2020-07-07 10:56:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-07 10:56:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 208 transitions. [2020-07-07 10:56:32,606 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 208 transitions. Word has length 85 [2020-07-07 10:56:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:32,607 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 208 transitions. [2020-07-07 10:56:32,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 10:56:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 208 transitions. [2020-07-07 10:56:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-07 10:56:32,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:32,609 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:32,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-07 10:56:32,822 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:32,823 INFO L82 PathProgramCache]: Analyzing trace with hash -393045524, now seen corresponding path program 2 times [2020-07-07 10:56:32,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:32,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437281711] [2020-07-07 10:56:32,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 95 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:33,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437281711] [2020-07-07 10:56:33,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844219497] [2020-07-07 10:56:33,108 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 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 10:56:33,222 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:33,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:33,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-07 10:56:33,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 27 proven. 84 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 10:56:33,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:33,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-07-07 10:56:33,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382900501] [2020-07-07 10:56:33,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 10:56:33,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:33,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 10:56:33,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-07-07 10:56:33,472 INFO L87 Difference]: Start difference. First operand 157 states and 208 transitions. Second operand 22 states. [2020-07-07 10:56:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:34,418 INFO L93 Difference]: Finished difference Result 326 states and 437 transitions. [2020-07-07 10:56:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 10:56:34,419 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2020-07-07 10:56:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:34,422 INFO L225 Difference]: With dead ends: 326 [2020-07-07 10:56:34,422 INFO L226 Difference]: Without dead ends: 209 [2020-07-07 10:56:34,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2020-07-07 10:56:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-07 10:56:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 159. [2020-07-07 10:56:34,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-07 10:56:34,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 211 transitions. [2020-07-07 10:56:34,504 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 211 transitions. Word has length 87 [2020-07-07 10:56:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:34,504 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 211 transitions. [2020-07-07 10:56:34,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 10:56:34,505 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 211 transitions. [2020-07-07 10:56:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-07-07 10:56:34,506 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:34,506 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:34,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:34,720 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:34,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1414598148, now seen corresponding path program 2 times [2020-07-07 10:56:34,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:34,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378373367] [2020-07-07 10:56:34,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 110 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:34,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378373367] [2020-07-07 10:56:34,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922067930] [2020-07-07 10:56:34,881 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 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 10:56:34,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:34,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:34,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-07 10:56:34,968 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 26 proven. 100 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 10:56:35,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:35,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-07-07 10:56:35,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396773989] [2020-07-07 10:56:35,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 10:56:35,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:35,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 10:56:35,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2020-07-07 10:56:35,104 INFO L87 Difference]: Start difference. First operand 159 states and 211 transitions. Second operand 22 states. [2020-07-07 10:56:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:36,057 INFO L93 Difference]: Finished difference Result 350 states and 491 transitions. [2020-07-07 10:56:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:56:36,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2020-07-07 10:56:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:36,061 INFO L225 Difference]: With dead ends: 350 [2020-07-07 10:56:36,061 INFO L226 Difference]: Without dead ends: 233 [2020-07-07 10:56:36,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 10:56:36,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-07-07 10:56:36,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-07-07 10:56:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-07 10:56:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 216 transitions. [2020-07-07 10:56:36,382 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 216 transitions. Word has length 88 [2020-07-07 10:56:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:36,382 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 216 transitions. [2020-07-07 10:56:36,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 10:56:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 216 transitions. [2020-07-07 10:56:36,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-07 10:56:36,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:36,384 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:36,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-07-07 10:56:36,600 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:36,601 INFO L82 PathProgramCache]: Analyzing trace with hash 125555133, now seen corresponding path program 3 times [2020-07-07 10:56:36,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:36,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377681873] [2020-07-07 10:56:36,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 4 proven. 119 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:36,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377681873] [2020-07-07 10:56:36,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069552986] [2020-07-07 10:56:36,868 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 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 10:56:37,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-07 10:56:37,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:37,030 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-07 10:56:37,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:38,289 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_mulflt_~b_8 Int)) (< (mod |c_mulflt_#in~a| 4294967296) (mod v_mulflt_~b_8 4294967296))) is different from true [2020-07-07 10:56:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-07 10:56:38,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:38,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2020-07-07 10:56:38,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898367298] [2020-07-07 10:56:38,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 10:56:38,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 10:56:38,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=256, Unknown=1, NotChecked=32, Total=342 [2020-07-07 10:56:38,309 INFO L87 Difference]: Start difference. First operand 163 states and 216 transitions. Second operand 19 states. [2020-07-07 10:56:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:42,604 INFO L93 Difference]: Finished difference Result 363 states and 502 transitions. [2020-07-07 10:56:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:56:42,605 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-07-07 10:56:42,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:42,608 INFO L225 Difference]: With dead ends: 363 [2020-07-07 10:56:42,608 INFO L226 Difference]: Without dead ends: 249 [2020-07-07 10:56:42,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=380, Unknown=1, NotChecked=42, Total=552 [2020-07-07 10:56:42,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-07 10:56:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2020-07-07 10:56:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-07 10:56:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 249 transitions. [2020-07-07 10:56:45,739 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 249 transitions. Word has length 90 [2020-07-07 10:56:45,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:45,739 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 249 transitions. [2020-07-07 10:56:45,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 10:56:45,739 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 249 transitions. [2020-07-07 10:56:45,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-07 10:56:45,741 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:45,741 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:45,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-07 10:56:45,944 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:45,944 INFO L82 PathProgramCache]: Analyzing trace with hash 497256653, now seen corresponding path program 1 times [2020-07-07 10:56:45,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:45,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546651000] [2020-07-07 10:56:45,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:46,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546651000] [2020-07-07 10:56:46,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090234275] [2020-07-07 10:56:46,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:56:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:46,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 10:56:46,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 26 proven. 126 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 10:56:46,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:46,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-07 10:56:46,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74128865] [2020-07-07 10:56:46,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 10:56:46,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:46,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 10:56:46,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=344, Unknown=0, NotChecked=0, Total=552 [2020-07-07 10:56:46,310 INFO L87 Difference]: Start difference. First operand 183 states and 249 transitions. Second operand 24 states. [2020-07-07 10:57:38,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:38,656 INFO L93 Difference]: Finished difference Result 408 states and 603 transitions. [2020-07-07 10:57:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 10:57:38,657 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2020-07-07 10:57:38,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:38,660 INFO L225 Difference]: With dead ends: 408 [2020-07-07 10:57:38,660 INFO L226 Difference]: Without dead ends: 269 [2020-07-07 10:57:38,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=487, Invalid=773, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 10:57:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-07 10:58:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 188. [2020-07-07 10:58:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-07 10:58:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 256 transitions. [2020-07-07 10:58:55,780 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 256 transitions. Word has length 91 [2020-07-07 10:58:55,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:55,781 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 256 transitions. [2020-07-07 10:58:55,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 10:58:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 256 transitions. [2020-07-07 10:58:55,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-07 10:58:55,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:55,783 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:55,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-07 10:58:55,997 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:55,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash -519499570, now seen corresponding path program 1 times [2020-07-07 10:58:55,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:55,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642456323] [2020-07-07 10:58:55,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 146 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:58:56,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642456323] [2020-07-07 10:58:56,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268017178] [2020-07-07 10:58:56,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:58:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:56,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-07 10:58:56,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 27 proven. 135 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 10:58:56,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:56,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-07 10:58:56,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411464299] [2020-07-07 10:58:56,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-07 10:58:56,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:56,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-07 10:58:56,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2020-07-07 10:58:56,722 INFO L87 Difference]: Start difference. First operand 188 states and 256 transitions. Second operand 26 states.