/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/loop-invgen/fragtest_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:16:31,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:16:31,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:16:31,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:16:31,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:16:31,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:16:31,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:16:31,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:16:31,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:16:31,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:16:31,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:16:31,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:16:31,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:16:31,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:16:31,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:16:31,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:16:31,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:16:31,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:16:31,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:16:31,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:16:31,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:16:31,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:16:31,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:16:31,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:16:31,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:16:31,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:16:31,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:16:31,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:16:31,669 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 [2020-07-17 12:16:31,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:16:31,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:16:31,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:16:31,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:16:31,686 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:16:31,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:16:31,686 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:16:31,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:16:31,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:16:31,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:16:31,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:16:31,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:16:31,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:16:31,688 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:16:31,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:16:31,688 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:16:31,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:16:31,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:16:31,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:16:31,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:16:31,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:16:31,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:16:31,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:16:31,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:16:31,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:16:31,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:16:31,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:16:31,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:16:31,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:16:31,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:16:32,032 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:16:32,060 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:16:32,065 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:16:32,068 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:16:32,068 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:16:32,071 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-07-17 12:16:32,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3bef9995/4b18cec2947046dbaf64a008870bdbe8/FLAGa59fa4f1a [2020-07-17 12:16:32,775 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:16:32,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-07-17 12:16:32,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3bef9995/4b18cec2947046dbaf64a008870bdbe8/FLAGa59fa4f1a [2020-07-17 12:16:33,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3bef9995/4b18cec2947046dbaf64a008870bdbe8 [2020-07-17 12:16:33,113 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:16:33,116 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:16:33,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:16:33,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:16:33,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:16:33,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:16:33" (1/1) ... [2020-07-17 12:16:33,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463ccf06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:33, skipping insertion in model container [2020-07-17 12:16:33,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:16:33" (1/1) ... [2020-07-17 12:16:33,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:16:33,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:16:33,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:16:33,369 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:16:33,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:16:33,409 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:16:33,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:33 WrapperNode [2020-07-17 12:16:33,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:16:33,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:16:33,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:16:33,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:16:33,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:33" (1/1) ... [2020-07-17 12:16:33,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:33" (1/1) ... [2020-07-17 12:16:33,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:33" (1/1) ... [2020-07-17 12:16:33,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:33" (1/1) ... [2020-07-17 12:16:33,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:33" (1/1) ... [2020-07-17 12:16:33,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:33" (1/1) ... [2020-07-17 12:16:33,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:33" (1/1) ... [2020-07-17 12:16:33,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:16:33,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:16:33,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:16:33,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:16:33,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:33" (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 [2020-07-17 12:16:33,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:16:33,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:16:33,628 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:16:33,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:16:33,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:16:33,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:16:33,629 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:16:33,630 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:16:33,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:16:33,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:16:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:16:33,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:16:33,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:16:33,919 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:16:33,920 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 12:16:33,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:16:33 BoogieIcfgContainer [2020-07-17 12:16:33,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:16:33,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:16:33,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:16:33,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:16:33,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:16:33" (1/3) ... [2020-07-17 12:16:33,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1425cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:16:33, skipping insertion in model container [2020-07-17 12:16:33,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:33" (2/3) ... [2020-07-17 12:16:33,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1425cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:16:33, skipping insertion in model container [2020-07-17 12:16:33,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:16:33" (3/3) ... [2020-07-17 12:16:33,941 INFO L109 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2020-07-17 12:16:33,961 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:16:33,974 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:16:34,001 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:16:34,045 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:16:34,046 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:16:34,046 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:16:34,046 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:16:34,046 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:16:34,047 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:16:34,047 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:16:34,047 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:16:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-17 12:16:34,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-17 12:16:34,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:34,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:34,085 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:34,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:34,095 INFO L82 PathProgramCache]: Analyzing trace with hash 317368997, now seen corresponding path program 1 times [2020-07-17 12:16:34,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:34,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693189909] [2020-07-17 12:16:34,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:34,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693189909] [2020-07-17 12:16:34,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:34,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 12:16:34,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960336132] [2020-07-17 12:16:34,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 12:16:34,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:34,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 12:16:34,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:16:34,299 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-07-17 12:16:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:34,332 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2020-07-17 12:16:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 12:16:34,334 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-07-17 12:16:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:34,344 INFO L225 Difference]: With dead ends: 47 [2020-07-17 12:16:34,344 INFO L226 Difference]: Without dead ends: 22 [2020-07-17 12:16:34,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:16:34,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-17 12:16:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-17 12:16:34,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-17 12:16:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-07-17 12:16:34,409 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2020-07-17 12:16:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:34,409 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-07-17 12:16:34,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 12:16:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-07-17 12:16:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 12:16:34,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:34,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:34,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:16:34,413 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:34,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1632722591, now seen corresponding path program 1 times [2020-07-17 12:16:34,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:34,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832042256] [2020-07-17 12:16:34,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:34,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832042256] [2020-07-17 12:16:34,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:34,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:16:34,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356116392] [2020-07-17 12:16:34,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:16:34,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:34,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:16:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:16:34,605 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-07-17 12:16:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:34,768 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-07-17 12:16:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:16:34,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-17 12:16:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:34,771 INFO L225 Difference]: With dead ends: 31 [2020-07-17 12:16:34,771 INFO L226 Difference]: Without dead ends: 29 [2020-07-17 12:16:34,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:16:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-17 12:16:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-07-17 12:16:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 12:16:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-17 12:16:34,809 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2020-07-17 12:16:34,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:34,811 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-17 12:16:34,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:16:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-17 12:16:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 12:16:34,815 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:34,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:34,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:16:34,818 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:34,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:34,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1401298672, now seen corresponding path program 1 times [2020-07-17 12:16:34,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:34,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878516638] [2020-07-17 12:16:34,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:34,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878516638] [2020-07-17 12:16:34,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:34,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:16:34,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123331275] [2020-07-17 12:16:34,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:16:34,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:34,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:16:34,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:16:34,926 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-07-17 12:16:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:35,064 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-07-17 12:16:35,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:16:35,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-07-17 12:16:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:35,070 INFO L225 Difference]: With dead ends: 49 [2020-07-17 12:16:35,070 INFO L226 Difference]: Without dead ends: 34 [2020-07-17 12:16:35,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:16:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-17 12:16:35,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-07-17 12:16:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 12:16:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-17 12:16:35,095 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-07-17 12:16:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:35,095 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-17 12:16:35,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:16:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-17 12:16:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 12:16:35,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:35,097 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:35,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:16:35,098 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:35,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:35,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1107622837, now seen corresponding path program 1 times [2020-07-17 12:16:35,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:35,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186762955] [2020-07-17 12:16:35,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:35,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186762955] [2020-07-17 12:16:35,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720886981] [2020-07-17 12:16:35,233 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 [2020-07-17 12:16:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:35,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:16:35,299 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:35,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:35,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-17 12:16:35,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084339550] [2020-07-17 12:16:35,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:16:35,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:16:35,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:16:35,388 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-07-17 12:16:35,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:35,507 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-07-17 12:16:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:16:35,508 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-17 12:16:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:35,510 INFO L225 Difference]: With dead ends: 55 [2020-07-17 12:16:35,510 INFO L226 Difference]: Without dead ends: 40 [2020-07-17 12:16:35,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:16:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-17 12:16:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2020-07-17 12:16:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 12:16:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-17 12:16:35,519 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-07-17 12:16:35,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:35,519 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-17 12:16:35,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:16:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-17 12:16:35,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 12:16:35,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:35,521 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:35,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:35,736 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:35,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1590427366, now seen corresponding path program 2 times [2020-07-17 12:16:35,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:35,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18560968] [2020-07-17 12:16:35,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:35,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18560968] [2020-07-17 12:16:35,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93213285] [2020-07-17 12:16:35,870 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:35,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:16:35,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:35,916 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-17 12:16:35,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:35,942 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:35,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:35,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-17 12:16:35,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442358312] [2020-07-17 12:16:35,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 12:16:35,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:35,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 12:16:35,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:16:35,979 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-07-17 12:16:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:36,076 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-07-17 12:16:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:16:36,077 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-17 12:16:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:36,079 INFO L225 Difference]: With dead ends: 47 [2020-07-17 12:16:36,079 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 12:16:36,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:16:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 12:16:36,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-07-17 12:16:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-17 12:16:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-17 12:16:36,088 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 29 [2020-07-17 12:16:36,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:36,089 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-17 12:16:36,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 12:16:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-17 12:16:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-17 12:16:36,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:36,092 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:36,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:36,307 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:36,308 INFO L82 PathProgramCache]: Analyzing trace with hash -30298372, now seen corresponding path program 3 times [2020-07-17 12:16:36,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:36,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341926381] [2020-07-17 12:16:36,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-17 12:16:36,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341926381] [2020-07-17 12:16:36,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231403377] [2020-07-17 12:16:36,465 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 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 [2020-07-17 12:16:36,515 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-17 12:16:36,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:36,516 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-17 12:16:36,520 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-17 12:16:36,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:36,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-07-17 12:16:36,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195991943] [2020-07-17 12:16:36,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 12:16:36,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:36,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 12:16:36,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-07-17 12:16:36,632 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 13 states. [2020-07-17 12:16:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:36,809 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-07-17 12:16:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:16:36,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-07-17 12:16:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:36,814 INFO L225 Difference]: With dead ends: 83 [2020-07-17 12:16:36,814 INFO L226 Difference]: Without dead ends: 58 [2020-07-17 12:16:36,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-07-17 12:16:36,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-17 12:16:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2020-07-17 12:16:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-17 12:16:36,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-17 12:16:36,832 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 45 [2020-07-17 12:16:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:36,833 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-17 12:16:36,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 12:16:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-17 12:16:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-17 12:16:36,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:36,842 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:37,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:37,044 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:37,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:37,045 INFO L82 PathProgramCache]: Analyzing trace with hash 130155809, now seen corresponding path program 4 times [2020-07-17 12:16:37,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:37,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388896103] [2020-07-17 12:16:37,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-17 12:16:37,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388896103] [2020-07-17 12:16:37,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60566174] [2020-07-17 12:16:37,301 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:16:37,353 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:16:37,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:37,356 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 12:16:37,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-17 12:16:37,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:37,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2020-07-17 12:16:37,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516007220] [2020-07-17 12:16:37,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 12:16:37,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:37,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 12:16:37,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-07-17 12:16:37,494 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 14 states. [2020-07-17 12:16:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:37,703 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-07-17 12:16:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:16:37,703 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-07-17 12:16:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:37,705 INFO L225 Difference]: With dead ends: 87 [2020-07-17 12:16:37,705 INFO L226 Difference]: Without dead ends: 64 [2020-07-17 12:16:37,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-17 12:16:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-17 12:16:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-07-17 12:16:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 12:16:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-07-17 12:16:37,717 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 47 [2020-07-17 12:16:37,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:37,718 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-07-17 12:16:37,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 12:16:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-07-17 12:16:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-17 12:16:37,719 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:37,720 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:37,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:37,934 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:37,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:37,935 INFO L82 PathProgramCache]: Analyzing trace with hash -292198906, now seen corresponding path program 5 times [2020-07-17 12:16:37,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:37,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913676337] [2020-07-17 12:16:37,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-17 12:16:38,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913676337] [2020-07-17 12:16:38,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843564711] [2020-07-17 12:16:38,074 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:16:38,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-07-17 12:16:38,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:38,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-17 12:16:38,137 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:38,181 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-17 12:16:38,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:38,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-17 12:16:38,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764098872] [2020-07-17 12:16:38,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:16:38,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:38,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:16:38,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:16:38,228 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2020-07-17 12:16:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:38,362 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-07-17 12:16:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:16:38,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-07-17 12:16:38,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:38,366 INFO L225 Difference]: With dead ends: 63 [2020-07-17 12:16:38,366 INFO L226 Difference]: Without dead ends: 61 [2020-07-17 12:16:38,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-07-17 12:16:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-17 12:16:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-07-17 12:16:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 12:16:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-07-17 12:16:38,377 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 49 [2020-07-17 12:16:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:38,378 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-07-17 12:16:38,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:16:38,378 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-07-17 12:16:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-17 12:16:38,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:38,386 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:38,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:38,601 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:38,602 INFO L82 PathProgramCache]: Analyzing trace with hash 551795688, now seen corresponding path program 6 times [2020-07-17 12:16:38,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:38,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938968654] [2020-07-17 12:16:38,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 60 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 12:16:38,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938968654] [2020-07-17 12:16:38,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843053511] [2020-07-17 12:16:38,812 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:16:38,896 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-07-17 12:16:38,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:38,900 INFO L264 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-17 12:16:38,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 60 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 12:16:39,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:39,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-07-17 12:16:39,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457387983] [2020-07-17 12:16:39,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 12:16:39,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:39,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 12:16:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2020-07-17 12:16:39,117 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 19 states. [2020-07-17 12:16:39,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:39,322 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2020-07-17 12:16:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 12:16:39,322 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2020-07-17 12:16:39,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:39,324 INFO L225 Difference]: With dead ends: 115 [2020-07-17 12:16:39,324 INFO L226 Difference]: Without dead ends: 82 [2020-07-17 12:16:39,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-07-17 12:16:39,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-17 12:16:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2020-07-17 12:16:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-17 12:16:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-07-17 12:16:39,334 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 65 [2020-07-17 12:16:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:39,334 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-07-17 12:16:39,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 12:16:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-07-17 12:16:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-17 12:16:39,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:39,336 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:39,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:39,552 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:39,553 INFO L82 PathProgramCache]: Analyzing trace with hash -150434419, now seen corresponding path program 7 times [2020-07-17 12:16:39,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:39,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483473124] [2020-07-17 12:16:39,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 12:16:39,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483473124] [2020-07-17 12:16:39,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921553905] [2020-07-17 12:16:39,720 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:16:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:39,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-17 12:16:39,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 12:16:39,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:39,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2020-07-17 12:16:39,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649616819] [2020-07-17 12:16:39,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 12:16:39,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:39,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 12:16:39,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-07-17 12:16:39,948 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 20 states. [2020-07-17 12:16:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:40,248 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2020-07-17 12:16:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 12:16:40,249 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-07-17 12:16:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:40,250 INFO L225 Difference]: With dead ends: 119 [2020-07-17 12:16:40,251 INFO L226 Difference]: Without dead ends: 88 [2020-07-17 12:16:40,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-07-17 12:16:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-17 12:16:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2020-07-17 12:16:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-17 12:16:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-07-17 12:16:40,261 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 67 [2020-07-17 12:16:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:40,261 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-07-17 12:16:40,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 12:16:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-07-17 12:16:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-17 12:16:40,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:40,263 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:40,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-17 12:16:40,479 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash -683701774, now seen corresponding path program 8 times [2020-07-17 12:16:40,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:40,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13453546] [2020-07-17 12:16:40,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 12:16:40,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13453546] [2020-07-17 12:16:40,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88641373] [2020-07-17 12:16:40,614 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 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 [2020-07-17 12:16:40,664 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:16:40,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:40,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-17 12:16:40,671 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:40,686 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 12:16:40,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:40,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-17 12:16:40,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902908777] [2020-07-17 12:16:40,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 12:16:40,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:40,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 12:16:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-07-17 12:16:40,720 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 13 states. [2020-07-17 12:16:40,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:40,828 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-07-17 12:16:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 12:16:40,829 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-07-17 12:16:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:40,830 INFO L225 Difference]: With dead ends: 79 [2020-07-17 12:16:40,830 INFO L226 Difference]: Without dead ends: 77 [2020-07-17 12:16:40,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-07-17 12:16:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-17 12:16:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-07-17 12:16:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-17 12:16:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-07-17 12:16:40,845 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 69 [2020-07-17 12:16:40,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:40,846 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-07-17 12:16:40,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 12:16:40,847 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-07-17 12:16:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-17 12:16:40,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:40,850 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:41,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-17 12:16:41,064 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:41,065 INFO L82 PathProgramCache]: Analyzing trace with hash 192972756, now seen corresponding path program 9 times [2020-07-17 12:16:41,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:41,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087206177] [2020-07-17 12:16:41,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 112 proven. 42 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 12:16:41,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087206177] [2020-07-17 12:16:41,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180883316] [2020-07-17 12:16:41,313 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 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 [2020-07-17 12:16:41,387 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-07-17 12:16:41,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:41,389 INFO L264 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-17 12:16:41,392 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 112 proven. 42 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 12:16:41,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:41,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2020-07-17 12:16:41,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637812941] [2020-07-17 12:16:41,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-17 12:16:41,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:41,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-17 12:16:41,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2020-07-17 12:16:41,644 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 25 states. [2020-07-17 12:16:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:41,975 INFO L93 Difference]: Finished difference Result 147 states and 174 transitions. [2020-07-17 12:16:41,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 12:16:41,976 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 85 [2020-07-17 12:16:41,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:41,978 INFO L225 Difference]: With dead ends: 147 [2020-07-17 12:16:41,979 INFO L226 Difference]: Without dead ends: 106 [2020-07-17 12:16:41,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=713, Unknown=0, NotChecked=0, Total=992 [2020-07-17 12:16:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-17 12:16:41,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2020-07-17 12:16:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-17 12:16:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-07-17 12:16:41,990 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 85 [2020-07-17 12:16:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:41,990 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-07-17 12:16:41,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-17 12:16:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-07-17 12:16:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-17 12:16:41,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:41,992 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:42,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:42,208 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:42,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1722356985, now seen corresponding path program 10 times [2020-07-17 12:16:42,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:42,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126094035] [2020-07-17 12:16:42,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 112 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 12:16:42,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126094035] [2020-07-17 12:16:42,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268195772] [2020-07-17 12:16:42,448 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:16:42,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:16:42,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:42,514 INFO L264 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-17 12:16:42,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 112 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 12:16:42,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:42,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2020-07-17 12:16:42,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234718013] [2020-07-17 12:16:42,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-17 12:16:42,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:42,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-17 12:16:42,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2020-07-17 12:16:42,763 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 26 states. [2020-07-17 12:16:43,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:43,178 INFO L93 Difference]: Finished difference Result 151 states and 181 transitions. [2020-07-17 12:16:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 12:16:43,179 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 87 [2020-07-17 12:16:43,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:43,180 INFO L225 Difference]: With dead ends: 151 [2020-07-17 12:16:43,180 INFO L226 Difference]: Without dead ends: 112 [2020-07-17 12:16:43,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 12:16:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-17 12:16:43,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-07-17 12:16:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-17 12:16:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-07-17 12:16:43,199 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 87 [2020-07-17 12:16:43,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:43,200 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-07-17 12:16:43,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-17 12:16:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-07-17 12:16:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-17 12:16:43,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:43,202 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:43,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:43,403 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:43,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1713181474, now seen corresponding path program 11 times [2020-07-17 12:16:43,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:43,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901811346] [2020-07-17 12:16:43,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 86 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 12:16:43,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901811346] [2020-07-17 12:16:43,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536462671] [2020-07-17 12:16:43,568 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:16:43,639 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-07-17 12:16:43,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:43,641 INFO L264 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-17 12:16:43,643 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:43,658 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 86 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 12:16:43,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:43,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-17 12:16:43,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541033713] [2020-07-17 12:16:43,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 12:16:43,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 12:16:43,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-07-17 12:16:43,706 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 15 states. [2020-07-17 12:16:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:43,847 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-07-17 12:16:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 12:16:43,848 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2020-07-17 12:16:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:43,851 INFO L225 Difference]: With dead ends: 95 [2020-07-17 12:16:43,851 INFO L226 Difference]: Without dead ends: 93 [2020-07-17 12:16:43,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-17 12:16:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-17 12:16:43,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-07-17 12:16:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-17 12:16:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-07-17 12:16:43,870 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 89 [2020-07-17 12:16:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:43,872 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-07-17 12:16:43,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 12:16:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-07-17 12:16:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-17 12:16:43,873 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:43,873 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:44,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-17 12:16:44,087 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:44,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:44,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1950838080, now seen corresponding path program 12 times [2020-07-17 12:16:44,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:44,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468162088] [2020-07-17 12:16:44,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 180 proven. 72 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-17 12:16:44,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468162088] [2020-07-17 12:16:44,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228745730] [2020-07-17 12:16:44,495 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:16:44,555 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-07-17 12:16:44,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:44,557 INFO L264 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-17 12:16:44,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 180 proven. 72 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-17 12:16:44,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:44,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2020-07-17 12:16:44,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021286894] [2020-07-17 12:16:44,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-17 12:16:44,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:44,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-17 12:16:44,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2020-07-17 12:16:44,896 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 31 states. [2020-07-17 12:16:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:45,348 INFO L93 Difference]: Finished difference Result 179 states and 213 transitions. [2020-07-17 12:16:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 12:16:45,349 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 105 [2020-07-17 12:16:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:45,352 INFO L225 Difference]: With dead ends: 179 [2020-07-17 12:16:45,353 INFO L226 Difference]: Without dead ends: 130 [2020-07-17 12:16:45,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=429, Invalid=1131, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 12:16:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-17 12:16:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 94. [2020-07-17 12:16:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-17 12:16:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2020-07-17 12:16:45,363 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 105 [2020-07-17 12:16:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:45,364 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2020-07-17 12:16:45,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-17 12:16:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2020-07-17 12:16:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-17 12:16:45,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:45,366 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:45,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-17 12:16:45,572 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:45,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:45,573 INFO L82 PathProgramCache]: Analyzing trace with hash -734782619, now seen corresponding path program 13 times [2020-07-17 12:16:45,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:45,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534428151] [2020-07-17 12:16:45,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 180 proven. 90 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-17 12:16:45,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534428151] [2020-07-17 12:16:45,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751989286] [2020-07-17 12:16:45,920 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:16:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-17 12:16:45,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 180 proven. 90 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-17 12:16:46,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:46,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2020-07-17 12:16:46,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918718214] [2020-07-17 12:16:46,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-17 12:16:46,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:46,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-17 12:16:46,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2020-07-17 12:16:46,360 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand 32 states. [2020-07-17 12:16:46,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:46,866 INFO L93 Difference]: Finished difference Result 183 states and 220 transitions. [2020-07-17 12:16:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 12:16:46,866 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 107 [2020-07-17 12:16:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:46,868 INFO L225 Difference]: With dead ends: 183 [2020-07-17 12:16:46,868 INFO L226 Difference]: Without dead ends: 136 [2020-07-17 12:16:46,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=481, Invalid=1241, Unknown=0, NotChecked=0, Total=1722 [2020-07-17 12:16:46,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-17 12:16:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-07-17 12:16:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-17 12:16:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-07-17 12:16:46,877 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 107 [2020-07-17 12:16:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:46,877 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-07-17 12:16:46,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-17 12:16:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-07-17 12:16:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-17 12:16:46,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:46,879 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:47,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-17 12:16:47,087 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:47,088 INFO L82 PathProgramCache]: Analyzing trace with hash -336589110, now seen corresponding path program 14 times [2020-07-17 12:16:47,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:47,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046207750] [2020-07-17 12:16:47,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 128 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-17 12:16:47,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046207750] [2020-07-17 12:16:47,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188948506] [2020-07-17 12:16:47,308 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 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 [2020-07-17 12:16:47,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:16:47,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:47,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-17 12:16:47,386 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:47,402 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 128 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-17 12:16:47,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:47,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-07-17 12:16:47,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677960006] [2020-07-17 12:16:47,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 12:16:47,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:47,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 12:16:47,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-17 12:16:47,454 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 17 states. [2020-07-17 12:16:47,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:47,614 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-07-17 12:16:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 12:16:47,614 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 109 [2020-07-17 12:16:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:47,616 INFO L225 Difference]: With dead ends: 111 [2020-07-17 12:16:47,616 INFO L226 Difference]: Without dead ends: 109 [2020-07-17 12:16:47,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-07-17 12:16:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-17 12:16:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-07-17 12:16:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-17 12:16:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2020-07-17 12:16:47,627 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 109 [2020-07-17 12:16:47,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:47,628 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2020-07-17 12:16:47,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 12:16:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2020-07-17 12:16:47,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-17 12:16:47,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:47,632 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:47,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:47,846 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:47,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:47,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1711037612, now seen corresponding path program 15 times [2020-07-17 12:16:47,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:47,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155514604] [2020-07-17 12:16:47,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 264 proven. 110 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-17 12:16:48,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155514604] [2020-07-17 12:16:48,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888892135] [2020-07-17 12:16:48,359 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 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 [2020-07-17 12:16:48,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-07-17 12:16:48,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:48,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-17 12:16:48,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 264 proven. 110 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-17 12:16:49,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:49,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2020-07-17 12:16:49,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683801902] [2020-07-17 12:16:49,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-17 12:16:49,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:49,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-17 12:16:49,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2020-07-17 12:16:49,224 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand 37 states. [2020-07-17 12:16:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:49,862 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2020-07-17 12:16:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 12:16:49,862 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 125 [2020-07-17 12:16:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:49,864 INFO L225 Difference]: With dead ends: 211 [2020-07-17 12:16:49,865 INFO L226 Difference]: Without dead ends: 154 [2020-07-17 12:16:49,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=611, Invalid=1645, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 12:16:49,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-07-17 12:16:49,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2020-07-17 12:16:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-17 12:16:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-07-17 12:16:49,880 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 125 [2020-07-17 12:16:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:49,881 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-07-17 12:16:49,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-17 12:16:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-07-17 12:16:49,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-17 12:16:49,884 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:49,884 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:50,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-17 12:16:50,099 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash 66724049, now seen corresponding path program 16 times [2020-07-17 12:16:50,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:50,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806891199] [2020-07-17 12:16:50,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 264 proven. 132 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-17 12:16:50,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806891199] [2020-07-17 12:16:50,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091983463] [2020-07-17 12:16:50,645 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:16:50,735 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:16:50,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:50,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-17 12:16:50,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 264 proven. 132 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-17 12:16:51,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:51,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 38 [2020-07-17 12:16:51,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468601252] [2020-07-17 12:16:51,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-17 12:16:51,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:51,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-17 12:16:51,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2020-07-17 12:16:51,252 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 38 states. [2020-07-17 12:16:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:51,822 INFO L93 Difference]: Finished difference Result 215 states and 259 transitions. [2020-07-17 12:16:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 12:16:51,822 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 127 [2020-07-17 12:16:51,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:51,824 INFO L225 Difference]: With dead ends: 215 [2020-07-17 12:16:51,824 INFO L226 Difference]: Without dead ends: 160 [2020-07-17 12:16:51,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 12:16:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-17 12:16:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2020-07-17 12:16:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-17 12:16:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-07-17 12:16:51,833 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 127 [2020-07-17 12:16:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:51,833 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-07-17 12:16:51,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-17 12:16:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-07-17 12:16:51,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-07-17 12:16:51,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:51,835 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:52,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:52,049 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:52,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:52,050 INFO L82 PathProgramCache]: Analyzing trace with hash 429354934, now seen corresponding path program 17 times [2020-07-17 12:16:52,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:52,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887710197] [2020-07-17 12:16:52,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 178 proven. 242 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-17 12:16:52,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887710197] [2020-07-17 12:16:52,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597060021] [2020-07-17 12:16:52,323 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:16:52,440 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-07-17 12:16:52,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:52,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-17 12:16:52,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:52,466 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 178 proven. 242 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-17 12:16:52,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:52,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-07-17 12:16:52,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963710719] [2020-07-17 12:16:52,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 12:16:52,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:52,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 12:16:52,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-07-17 12:16:52,521 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 19 states. [2020-07-17 12:16:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:52,724 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2020-07-17 12:16:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 12:16:52,729 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 129 [2020-07-17 12:16:52,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:52,730 INFO L225 Difference]: With dead ends: 127 [2020-07-17 12:16:52,730 INFO L226 Difference]: Without dead ends: 125 [2020-07-17 12:16:52,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-07-17 12:16:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-17 12:16:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-07-17 12:16:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-17 12:16:52,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-07-17 12:16:52,741 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 129 [2020-07-17 12:16:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:52,742 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-07-17 12:16:52,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 12:16:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-07-17 12:16:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-17 12:16:52,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:52,745 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:52,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:52,953 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:52,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1971086744, now seen corresponding path program 18 times [2020-07-17 12:16:52,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:52,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371724265] [2020-07-17 12:16:52,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 364 proven. 156 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-17 12:16:53,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371724265] [2020-07-17 12:16:53,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501927931] [2020-07-17 12:16:53,457 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:16:53,551 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-07-17 12:16:53,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:53,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-17 12:16:53,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 364 proven. 156 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-17 12:16:54,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:54,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2020-07-17 12:16:54,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564290075] [2020-07-17 12:16:54,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-17 12:16:54,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:54,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-17 12:16:54,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1358, Unknown=0, NotChecked=0, Total=1806 [2020-07-17 12:16:54,113 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 43 states. [2020-07-17 12:16:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:54,796 INFO L93 Difference]: Finished difference Result 243 states and 291 transitions. [2020-07-17 12:16:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 12:16:54,797 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 145 [2020-07-17 12:16:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:54,799 INFO L225 Difference]: With dead ends: 243 [2020-07-17 12:16:54,799 INFO L226 Difference]: Without dead ends: 178 [2020-07-17 12:16:54,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=825, Invalid=2255, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 12:16:54,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-17 12:16:54,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2020-07-17 12:16:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-17 12:16:54,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2020-07-17 12:16:54,817 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 145 [2020-07-17 12:16:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:54,817 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2020-07-17 12:16:54,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-17 12:16:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2020-07-17 12:16:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-17 12:16:54,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:54,819 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:55,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-17 12:16:55,033 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash 554411325, now seen corresponding path program 19 times [2020-07-17 12:16:55,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:55,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804277896] [2020-07-17 12:16:55,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 364 proven. 182 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-17 12:16:55,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804277896] [2020-07-17 12:16:55,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069513166] [2020-07-17 12:16:55,718 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:16:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:55,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-17 12:16:55,833 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 364 proven. 182 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-17 12:16:56,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:56,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 44 [2020-07-17 12:16:56,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666504542] [2020-07-17 12:16:56,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-17 12:16:56,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:56,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-17 12:16:56,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 12:16:56,401 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand 44 states. [2020-07-17 12:16:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:57,222 INFO L93 Difference]: Finished difference Result 247 states and 298 transitions. [2020-07-17 12:16:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 12:16:57,223 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 147 [2020-07-17 12:16:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:57,226 INFO L225 Difference]: With dead ends: 247 [2020-07-17 12:16:57,226 INFO L226 Difference]: Without dead ends: 184 [2020-07-17 12:16:57,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2020-07-17 12:16:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-17 12:16:57,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 128. [2020-07-17 12:16:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-17 12:16:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2020-07-17 12:16:57,243 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 147 [2020-07-17 12:16:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:57,244 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2020-07-17 12:16:57,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-17 12:16:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2020-07-17 12:16:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-17 12:16:57,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:57,245 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:57,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:57,461 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:57,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:57,461 INFO L82 PathProgramCache]: Analyzing trace with hash 633966498, now seen corresponding path program 20 times [2020-07-17 12:16:57,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:57,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192709116] [2020-07-17 12:16:57,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 236 proven. 338 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-17 12:16:57,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192709116] [2020-07-17 12:16:57,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823144754] [2020-07-17 12:16:57,861 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 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 [2020-07-17 12:16:57,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:16:57,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:57,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-17 12:16:57,968 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:57,990 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 236 proven. 338 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-17 12:16:58,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:58,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-07-17 12:16:58,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289258643] [2020-07-17 12:16:58,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 12:16:58,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 12:16:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2020-07-17 12:16:58,046 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand 21 states. [2020-07-17 12:16:58,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:58,303 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-07-17 12:16:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 12:16:58,309 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 149 [2020-07-17 12:16:58,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:58,311 INFO L225 Difference]: With dead ends: 143 [2020-07-17 12:16:58,311 INFO L226 Difference]: Without dead ends: 141 [2020-07-17 12:16:58,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-07-17 12:16:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-07-17 12:16:58,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-07-17 12:16:58,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-17 12:16:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2020-07-17 12:16:58,321 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 149 [2020-07-17 12:16:58,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:58,322 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2020-07-17 12:16:58,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 12:16:58,322 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2020-07-17 12:16:58,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-07-17 12:16:58,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:58,324 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:58,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-17 12:16:58,537 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:58,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:58,538 INFO L82 PathProgramCache]: Analyzing trace with hash -869716604, now seen corresponding path program 21 times [2020-07-17 12:16:58,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:58,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079052802] [2020-07-17 12:16:58,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 480 proven. 210 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-17 12:16:59,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079052802] [2020-07-17 12:16:59,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642504187] [2020-07-17 12:16:59,400 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 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 [2020-07-17 12:16:59,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-07-17 12:16:59,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:59,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-17 12:16:59,567 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 480 proven. 210 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-17 12:17:00,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:00,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2020-07-17 12:17:00,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028057424] [2020-07-17 12:17:00,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-17 12:17:00,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:00,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-17 12:17:00,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=1776, Unknown=0, NotChecked=0, Total=2352 [2020-07-17 12:17:00,572 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 49 states. [2020-07-17 12:17:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:01,597 INFO L93 Difference]: Finished difference Result 275 states and 330 transitions. [2020-07-17 12:17:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-17 12:17:01,598 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 165 [2020-07-17 12:17:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:01,601 INFO L225 Difference]: With dead ends: 275 [2020-07-17 12:17:01,601 INFO L226 Difference]: Without dead ends: 202 [2020-07-17 12:17:01,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1071, Invalid=2961, Unknown=0, NotChecked=0, Total=4032 [2020-07-17 12:17:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-17 12:17:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 142. [2020-07-17 12:17:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-17 12:17:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2020-07-17 12:17:01,618 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 165 [2020-07-17 12:17:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:01,619 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2020-07-17 12:17:01,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-17 12:17:01,619 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2020-07-17 12:17:01,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-07-17 12:17:01,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:01,621 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:01,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-17 12:17:01,836 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:01,837 INFO L82 PathProgramCache]: Analyzing trace with hash -583456599, now seen corresponding path program 22 times [2020-07-17 12:17:01,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:01,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424594] [2020-07-17 12:17:01,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 480 proven. 240 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-17 12:17:02,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424594] [2020-07-17 12:17:02,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110980895] [2020-07-17 12:17:02,598 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:17:02,703 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:17:02,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:02,707 INFO L264 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-17 12:17:02,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 480 proven. 240 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-17 12:17:03,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:03,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 50 [2020-07-17 12:17:03,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689540668] [2020-07-17 12:17:03,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-17 12:17:03,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:03,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-17 12:17:03,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 12:17:03,477 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand 50 states. [2020-07-17 12:17:04,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:04,520 INFO L93 Difference]: Finished difference Result 279 states and 337 transitions. [2020-07-17 12:17:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-17 12:17:04,521 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 167 [2020-07-17 12:17:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:04,523 INFO L225 Difference]: With dead ends: 279 [2020-07-17 12:17:04,523 INFO L226 Difference]: Without dead ends: 208 [2020-07-17 12:17:04,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1153, Invalid=3137, Unknown=0, NotChecked=0, Total=4290 [2020-07-17 12:17:04,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-17 12:17:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 144. [2020-07-17 12:17:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-17 12:17:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-07-17 12:17:04,539 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 167 [2020-07-17 12:17:04,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:04,539 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-07-17 12:17:04,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-17 12:17:04,540 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-07-17 12:17:04,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-07-17 12:17:04,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:04,542 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:04,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:04,758 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:04,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:04,759 INFO L82 PathProgramCache]: Analyzing trace with hash -365498738, now seen corresponding path program 23 times [2020-07-17 12:17:04,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:04,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348771573] [2020-07-17 12:17:04,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 302 proven. 450 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-17 12:17:05,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348771573] [2020-07-17 12:17:05,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651510839] [2020-07-17 12:17:05,208 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:17:05,372 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-07-17 12:17:05,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:05,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-17 12:17:05,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:05,410 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:17:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 302 proven. 450 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-17 12:17:05,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:05,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-07-17 12:17:05,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687718748] [2020-07-17 12:17:05,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-17 12:17:05,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:05,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-17 12:17:05,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2020-07-17 12:17:05,477 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 23 states. [2020-07-17 12:17:05,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:05,866 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-07-17 12:17:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 12:17:05,867 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 169 [2020-07-17 12:17:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:05,869 INFO L225 Difference]: With dead ends: 159 [2020-07-17 12:17:05,870 INFO L226 Difference]: Without dead ends: 157 [2020-07-17 12:17:05,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2020-07-17 12:17:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-17 12:17:05,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-07-17 12:17:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-17 12:17:05,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 167 transitions. [2020-07-17 12:17:05,885 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 167 transitions. Word has length 169 [2020-07-17 12:17:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:05,888 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 167 transitions. [2020-07-17 12:17:05,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-17 12:17:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 167 transitions. [2020-07-17 12:17:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-07-17 12:17:05,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:05,891 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:06,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-17 12:17:06,106 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash -760007568, now seen corresponding path program 24 times [2020-07-17 12:17:06,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:06,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368631166] [2020-07-17 12:17:06,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 612 proven. 272 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-07-17 12:17:07,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368631166] [2020-07-17 12:17:07,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74163191] [2020-07-17 12:17:07,134 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:17:07,262 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-07-17 12:17:07,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:07,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-17 12:17:07,270 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 612 proven. 272 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-07-17 12:17:08,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:08,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2020-07-17 12:17:08,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660094802] [2020-07-17 12:17:08,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-17 12:17:08,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:08,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-17 12:17:08,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=2250, Unknown=0, NotChecked=0, Total=2970 [2020-07-17 12:17:08,479 INFO L87 Difference]: Start difference. First operand 156 states and 167 transitions. Second operand 55 states. [2020-07-17 12:17:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:09,533 INFO L93 Difference]: Finished difference Result 307 states and 369 transitions. [2020-07-17 12:17:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-17 12:17:09,534 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 185 [2020-07-17 12:17:09,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:09,537 INFO L225 Difference]: With dead ends: 307 [2020-07-17 12:17:09,537 INFO L226 Difference]: Without dead ends: 226 [2020-07-17 12:17:09,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1349, Invalid=3763, Unknown=0, NotChecked=0, Total=5112 [2020-07-17 12:17:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-17 12:17:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 158. [2020-07-17 12:17:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-17 12:17:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2020-07-17 12:17:09,553 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 185 [2020-07-17 12:17:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:09,553 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2020-07-17 12:17:09,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-17 12:17:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2020-07-17 12:17:09,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-07-17 12:17:09,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:09,555 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:09,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:09,769 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:09,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1861014763, now seen corresponding path program 25 times [2020-07-17 12:17:09,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:09,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880581161] [2020-07-17 12:17:09,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1462 backedges. 612 proven. 306 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-07-17 12:17:10,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880581161] [2020-07-17 12:17:10,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273412314] [2020-07-17 12:17:10,908 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:17:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:11,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-17 12:17:11,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1462 backedges. 612 proven. 306 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-07-17 12:17:12,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:12,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 56 [2020-07-17 12:17:12,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837383795] [2020-07-17 12:17:12,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-17 12:17:12,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:12,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-17 12:17:12,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=2341, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 12:17:12,055 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand 56 states. [2020-07-17 12:17:13,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:13,519 INFO L93 Difference]: Finished difference Result 311 states and 376 transitions. [2020-07-17 12:17:13,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-17 12:17:13,520 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 187 [2020-07-17 12:17:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:13,523 INFO L225 Difference]: With dead ends: 311 [2020-07-17 12:17:13,523 INFO L226 Difference]: Without dead ends: 232 [2020-07-17 12:17:13,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1441, Invalid=3961, Unknown=0, NotChecked=0, Total=5402 [2020-07-17 12:17:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-17 12:17:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2020-07-17 12:17:13,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-17 12:17:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 171 transitions. [2020-07-17 12:17:13,545 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 171 transitions. Word has length 187 [2020-07-17 12:17:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:13,545 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 171 transitions. [2020-07-17 12:17:13,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-17 12:17:13,545 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 171 transitions. [2020-07-17 12:17:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-17 12:17:13,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:13,550 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:13,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-17 12:17:13,765 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:13,766 INFO L82 PathProgramCache]: Analyzing trace with hash 927992954, now seen corresponding path program 26 times [2020-07-17 12:17:13,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:13,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094112669] [2020-07-17 12:17:13,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 376 proven. 578 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-07-17 12:17:14,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094112669] [2020-07-17 12:17:14,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457014503] [2020-07-17 12:17:14,229 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 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 [2020-07-17 12:17:14,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:17:14,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:14,353 INFO L264 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-17 12:17:14,368 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:14,398 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:17:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 376 proven. 578 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-07-17 12:17:14,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:14,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-07-17 12:17:14,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716492761] [2020-07-17 12:17:14,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-17 12:17:14,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:14,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-17 12:17:14,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=380, Unknown=0, NotChecked=0, Total=600 [2020-07-17 12:17:14,499 INFO L87 Difference]: Start difference. First operand 160 states and 171 transitions. Second operand 25 states. [2020-07-17 12:17:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:14,884 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2020-07-17 12:17:14,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 12:17:14,885 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 189 [2020-07-17 12:17:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:14,888 INFO L225 Difference]: With dead ends: 175 [2020-07-17 12:17:14,888 INFO L226 Difference]: Without dead ends: 173 [2020-07-17 12:17:14,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-07-17 12:17:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-17 12:17:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-07-17 12:17:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-17 12:17:14,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 184 transitions. [2020-07-17 12:17:14,916 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 184 transitions. Word has length 189 [2020-07-17 12:17:14,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:14,918 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 184 transitions. [2020-07-17 12:17:14,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-17 12:17:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 184 transitions. [2020-07-17 12:17:14,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-07-17 12:17:14,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:14,922 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:15,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-17 12:17:15,136 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1753938524, now seen corresponding path program 27 times [2020-07-17 12:17:15,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:15,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635476458] [2020-07-17 12:17:15,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 760 proven. 342 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-17 12:17:16,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635476458] [2020-07-17 12:17:16,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227219433] [2020-07-17 12:17:16,267 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 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 [2020-07-17 12:17:16,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-07-17 12:17:16,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:16,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-17 12:17:16,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 760 proven. 342 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-17 12:17:17,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:17,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2020-07-17 12:17:17,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414853306] [2020-07-17 12:17:17,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-17 12:17:17,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:17,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-17 12:17:17,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2020-07-17 12:17:17,640 INFO L87 Difference]: Start difference. First operand 172 states and 184 transitions. Second operand 61 states. [2020-07-17 12:17:19,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:19,085 INFO L93 Difference]: Finished difference Result 339 states and 408 transitions. [2020-07-17 12:17:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-17 12:17:19,085 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 205 [2020-07-17 12:17:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:19,087 INFO L225 Difference]: With dead ends: 339 [2020-07-17 12:17:19,087 INFO L226 Difference]: Without dead ends: 250 [2020-07-17 12:17:19,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1659, Invalid=4661, Unknown=0, NotChecked=0, Total=6320 [2020-07-17 12:17:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-17 12:17:19,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 174. [2020-07-17 12:17:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-17 12:17:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 186 transitions. [2020-07-17 12:17:19,103 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 186 transitions. Word has length 205 [2020-07-17 12:17:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:19,104 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 186 transitions. [2020-07-17 12:17:19,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-17 12:17:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 186 transitions. [2020-07-17 12:17:19,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-07-17 12:17:19,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:19,105 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:19,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:19,320 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1542073473, now seen corresponding path program 28 times [2020-07-17 12:17:19,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:19,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200036820] [2020-07-17 12:17:19,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 760 proven. 380 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-17 12:17:20,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200036820] [2020-07-17 12:17:20,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067061173] [2020-07-17 12:17:20,329 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 12:17:20,424 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:17:20,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:20,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-17 12:17:20,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 760 proven. 380 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-17 12:17:21,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:21,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 62 [2020-07-17 12:17:21,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651021537] [2020-07-17 12:17:21,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-17 12:17:21,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:21,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-17 12:17:21,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2881, Unknown=0, NotChecked=0, Total=3782 [2020-07-17 12:17:21,571 INFO L87 Difference]: Start difference. First operand 174 states and 186 transitions. Second operand 62 states. [2020-07-17 12:17:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:22,775 INFO L93 Difference]: Finished difference Result 343 states and 415 transitions. [2020-07-17 12:17:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-17 12:17:22,775 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 207 [2020-07-17 12:17:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:22,778 INFO L225 Difference]: With dead ends: 343 [2020-07-17 12:17:22,778 INFO L226 Difference]: Without dead ends: 256 [2020-07-17 12:17:22,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1761, Invalid=4881, Unknown=0, NotChecked=0, Total=6642 [2020-07-17 12:17:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-07-17 12:17:22,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 176. [2020-07-17 12:17:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-07-17 12:17:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 188 transitions. [2020-07-17 12:17:22,792 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 188 transitions. Word has length 207 [2020-07-17 12:17:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:22,792 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 188 transitions. [2020-07-17 12:17:22,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-17 12:17:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 188 transitions. [2020-07-17 12:17:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-07-17 12:17:22,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:22,794 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:23,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:23,009 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:23,010 INFO L82 PathProgramCache]: Analyzing trace with hash -196777626, now seen corresponding path program 29 times [2020-07-17 12:17:23,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:23,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356703295] [2020-07-17 12:17:23,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 458 proven. 722 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-17 12:17:23,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356703295] [2020-07-17 12:17:23,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616750209] [2020-07-17 12:17:23,567 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:23,755 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-07-17 12:17:23,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:23,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-17 12:17:23,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:23,785 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:17:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 458 proven. 722 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-17 12:17:23,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:23,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-07-17 12:17:23,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424350121] [2020-07-17 12:17:23,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-17 12:17:23,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:23,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-17 12:17:23,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2020-07-17 12:17:23,871 INFO L87 Difference]: Start difference. First operand 176 states and 188 transitions. Second operand 27 states. [2020-07-17 12:17:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:24,141 INFO L93 Difference]: Finished difference Result 191 states and 204 transitions. [2020-07-17 12:17:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 12:17:24,142 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 209 [2020-07-17 12:17:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:24,146 INFO L225 Difference]: With dead ends: 191 [2020-07-17 12:17:24,146 INFO L226 Difference]: Without dead ends: 189 [2020-07-17 12:17:24,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2020-07-17 12:17:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-07-17 12:17:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-07-17 12:17:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-17 12:17:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 201 transitions. [2020-07-17 12:17:24,159 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 201 transitions. Word has length 209 [2020-07-17 12:17:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:24,160 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 201 transitions. [2020-07-17 12:17:24,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-17 12:17:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 201 transitions. [2020-07-17 12:17:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-07-17 12:17:24,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:24,163 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:24,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-07-17 12:17:24,377 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:24,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:24,378 INFO L82 PathProgramCache]: Analyzing trace with hash 65077064, now seen corresponding path program 30 times [2020-07-17 12:17:24,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:24,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788468138] [2020-07-17 12:17:24,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2184 backedges. 924 proven. 420 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-07-17 12:17:25,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788468138] [2020-07-17 12:17:25,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089014615] [2020-07-17 12:17:25,847 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:25,975 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-07-17 12:17:25,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:25,979 INFO L264 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-17 12:17:25,987 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2184 backedges. 924 proven. 420 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-07-17 12:17:27,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:27,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2020-07-17 12:17:27,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321492056] [2020-07-17 12:17:27,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-17 12:17:27,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:27,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-17 12:17:27,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=3366, Unknown=0, NotChecked=0, Total=4422 [2020-07-17 12:17:27,418 INFO L87 Difference]: Start difference. First operand 188 states and 201 transitions. Second operand 67 states. [2020-07-17 12:17:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:29,130 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-07-17 12:17:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-17 12:17:29,131 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 225 [2020-07-17 12:17:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:29,134 INFO L225 Difference]: With dead ends: 371 [2020-07-17 12:17:29,134 INFO L226 Difference]: Without dead ends: 274 [2020-07-17 12:17:29,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2001, Invalid=5655, Unknown=0, NotChecked=0, Total=7656 [2020-07-17 12:17:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-17 12:17:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 190. [2020-07-17 12:17:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-17 12:17:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 203 transitions. [2020-07-17 12:17:29,149 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 203 transitions. Word has length 225 [2020-07-17 12:17:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:29,149 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 203 transitions. [2020-07-17 12:17:29,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-17 12:17:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 203 transitions. [2020-07-17 12:17:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-07-17 12:17:29,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:29,152 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:29,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:29,368 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:29,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1137618157, now seen corresponding path program 31 times [2020-07-17 12:17:29,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:29,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098927076] [2020-07-17 12:17:29,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 924 proven. 462 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-07-17 12:17:30,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098927076] [2020-07-17 12:17:30,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580421215] [2020-07-17 12:17:30,805 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:30,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-17 12:17:30,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 924 proven. 462 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-07-17 12:17:32,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:32,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 68 [2020-07-17 12:17:32,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385743300] [2020-07-17 12:17:32,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-17 12:17:32,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:32,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-17 12:17:32,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1079, Invalid=3477, Unknown=0, NotChecked=0, Total=4556 [2020-07-17 12:17:32,463 INFO L87 Difference]: Start difference. First operand 190 states and 203 transitions. Second operand 68 states. [2020-07-17 12:17:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:34,293 INFO L93 Difference]: Finished difference Result 375 states and 454 transitions. [2020-07-17 12:17:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-17 12:17:34,293 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 227 [2020-07-17 12:17:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:34,295 INFO L225 Difference]: With dead ends: 375 [2020-07-17 12:17:34,296 INFO L226 Difference]: Without dead ends: 280 [2020-07-17 12:17:34,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2113, Invalid=5897, Unknown=0, NotChecked=0, Total=8010 [2020-07-17 12:17:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-07-17 12:17:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 192. [2020-07-17 12:17:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-17 12:17:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 205 transitions. [2020-07-17 12:17:34,312 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 205 transitions. Word has length 227 [2020-07-17 12:17:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:34,312 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 205 transitions. [2020-07-17 12:17:34,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-17 12:17:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 205 transitions. [2020-07-17 12:17:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-07-17 12:17:34,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:34,314 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:34,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-17 12:17:34,529 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:34,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1057457490, now seen corresponding path program 32 times [2020-07-17 12:17:34,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:34,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090107386] [2020-07-17 12:17:34,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 548 proven. 882 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-07-17 12:17:35,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090107386] [2020-07-17 12:17:35,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64871317] [2020-07-17 12:17:35,148 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:35,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:17:35,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:35,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-17 12:17:35,262 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:35,283 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:17:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 548 proven. 882 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-07-17 12:17:35,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:35,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-07-17 12:17:35,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109041002] [2020-07-17 12:17:35,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-17 12:17:35,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:35,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-17 12:17:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=502, Unknown=0, NotChecked=0, Total=812 [2020-07-17 12:17:35,356 INFO L87 Difference]: Start difference. First operand 192 states and 205 transitions. Second operand 29 states. [2020-07-17 12:17:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:35,807 INFO L93 Difference]: Finished difference Result 207 states and 221 transitions. [2020-07-17 12:17:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 12:17:35,809 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 229 [2020-07-17 12:17:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:35,811 INFO L225 Difference]: With dead ends: 207 [2020-07-17 12:17:35,811 INFO L226 Difference]: Without dead ends: 205 [2020-07-17 12:17:35,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2020-07-17 12:17:35,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-17 12:17:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-07-17 12:17:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-17 12:17:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 218 transitions. [2020-07-17 12:17:35,827 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 218 transitions. Word has length 229 [2020-07-17 12:17:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:35,827 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 218 transitions. [2020-07-17 12:17:35,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-17 12:17:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 218 transitions. [2020-07-17 12:17:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-07-17 12:17:35,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:35,829 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:36,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-17 12:17:36,043 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:36,044 INFO L82 PathProgramCache]: Analyzing trace with hash -777665740, now seen corresponding path program 33 times [2020-07-17 12:17:36,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:36,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9756930] [2020-07-17 12:17:36,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 1104 proven. 506 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-17 12:17:37,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9756930] [2020-07-17 12:17:37,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389590899] [2020-07-17 12:17:37,492 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:37,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-07-17 12:17:37,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:37,655 INFO L264 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-17 12:17:37,661 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 1104 proven. 506 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-17 12:17:39,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:39,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2020-07-17 12:17:39,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458873892] [2020-07-17 12:17:39,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-07-17 12:17:39,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:39,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-07-17 12:17:39,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1248, Invalid=4008, Unknown=0, NotChecked=0, Total=5256 [2020-07-17 12:17:39,528 INFO L87 Difference]: Start difference. First operand 204 states and 218 transitions. Second operand 73 states. [2020-07-17 12:17:41,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:41,417 INFO L93 Difference]: Finished difference Result 403 states and 486 transitions. [2020-07-17 12:17:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-17 12:17:41,418 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 245 [2020-07-17 12:17:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:41,420 INFO L225 Difference]: With dead ends: 403 [2020-07-17 12:17:41,420 INFO L226 Difference]: Without dead ends: 298 [2020-07-17 12:17:41,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2375, Invalid=6745, Unknown=0, NotChecked=0, Total=9120 [2020-07-17 12:17:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-07-17 12:17:41,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 206. [2020-07-17 12:17:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-17 12:17:41,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 220 transitions. [2020-07-17 12:17:41,434 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 220 transitions. Word has length 245 [2020-07-17 12:17:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:41,435 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 220 transitions. [2020-07-17 12:17:41,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-07-17 12:17:41,435 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 220 transitions. [2020-07-17 12:17:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-07-17 12:17:41,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:41,437 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:41,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-17 12:17:41,651 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:41,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:41,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1435577433, now seen corresponding path program 34 times [2020-07-17 12:17:41,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:41,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740676516] [2020-07-17 12:17:41,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2668 backedges. 1104 proven. 552 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-17 12:17:43,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740676516] [2020-07-17 12:17:43,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418292587] [2020-07-17 12:17:43,210 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:43,313 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:17:43,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:43,315 INFO L264 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-17 12:17:43,319 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2668 backedges. 1104 proven. 552 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-17 12:17:44,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:44,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 74 [2020-07-17 12:17:44,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471006164] [2020-07-17 12:17:44,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-07-17 12:17:44,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:44,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-07-17 12:17:44,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2020-07-17 12:17:44,951 INFO L87 Difference]: Start difference. First operand 206 states and 220 transitions. Second operand 74 states. [2020-07-17 12:17:46,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:46,712 INFO L93 Difference]: Finished difference Result 407 states and 493 transitions. [2020-07-17 12:17:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-17 12:17:46,712 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 247 [2020-07-17 12:17:46,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:46,713 INFO L225 Difference]: With dead ends: 407 [2020-07-17 12:17:46,713 INFO L226 Difference]: Without dead ends: 304 [2020-07-17 12:17:46,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2497, Invalid=7009, Unknown=0, NotChecked=0, Total=9506 [2020-07-17 12:17:46,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-07-17 12:17:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 208. [2020-07-17 12:17:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-17 12:17:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 222 transitions. [2020-07-17 12:17:46,727 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 222 transitions. Word has length 247 [2020-07-17 12:17:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:46,727 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 222 transitions. [2020-07-17 12:17:46,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-07-17 12:17:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 222 transitions. [2020-07-17 12:17:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-07-17 12:17:46,729 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:46,729 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:46,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-17 12:17:46,945 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:46,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:46,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1941512130, now seen corresponding path program 35 times [2020-07-17 12:17:46,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:46,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560026294] [2020-07-17 12:17:46,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2716 backedges. 646 proven. 1058 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-17 12:17:47,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560026294] [2020-07-17 12:17:47,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456256784] [2020-07-17 12:17:47,603 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:47,758 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-07-17 12:17:47,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:47,765 INFO L264 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-17 12:17:47,771 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:47,792 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:17:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2716 backedges. 646 proven. 1058 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-17 12:17:47,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:47,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-07-17 12:17:47,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606123217] [2020-07-17 12:17:47,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-17 12:17:47,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:47,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-17 12:17:47,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=569, Unknown=0, NotChecked=0, Total=930 [2020-07-17 12:17:47,935 INFO L87 Difference]: Start difference. First operand 208 states and 222 transitions. Second operand 31 states. [2020-07-17 12:17:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:48,368 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2020-07-17 12:17:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 12:17:48,369 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 249 [2020-07-17 12:17:48,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:48,372 INFO L225 Difference]: With dead ends: 223 [2020-07-17 12:17:48,372 INFO L226 Difference]: Without dead ends: 221 [2020-07-17 12:17:48,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=367, Invalid=625, Unknown=0, NotChecked=0, Total=992 [2020-07-17 12:17:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-17 12:17:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2020-07-17 12:17:48,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-17 12:17:48,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 235 transitions. [2020-07-17 12:17:48,392 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 235 transitions. Word has length 249 [2020-07-17 12:17:48,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:48,393 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 235 transitions. [2020-07-17 12:17:48,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-17 12:17:48,393 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 235 transitions. [2020-07-17 12:17:48,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-07-17 12:17:48,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:48,396 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:48,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-17 12:17:48,610 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:48,611 INFO L82 PathProgramCache]: Analyzing trace with hash -712391136, now seen corresponding path program 36 times [2020-07-17 12:17:48,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:48,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017828368] [2020-07-17 12:17:48,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 1300 proven. 600 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-07-17 12:17:50,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017828368] [2020-07-17 12:17:50,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549520823] [2020-07-17 12:17:50,143 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:50,264 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2020-07-17 12:17:50,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:17:50,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 53 conjunts are in the unsatisfiable core [2020-07-17 12:17:50,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 1300 proven. 600 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-07-17 12:17:52,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:52,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2020-07-17 12:17:52,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902989978] [2020-07-17 12:17:52,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-07-17 12:17:52,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:52,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-07-17 12:17:52,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=4706, Unknown=0, NotChecked=0, Total=6162 [2020-07-17 12:17:52,505 INFO L87 Difference]: Start difference. First operand 220 states and 235 transitions. Second operand 79 states. [2020-07-17 12:17:54,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:54,766 INFO L93 Difference]: Finished difference Result 435 states and 525 transitions. [2020-07-17 12:17:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-07-17 12:17:54,767 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 265 [2020-07-17 12:17:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:54,769 INFO L225 Difference]: With dead ends: 435 [2020-07-17 12:17:54,769 INFO L226 Difference]: Without dead ends: 322 [2020-07-17 12:17:54,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2781, Invalid=7931, Unknown=0, NotChecked=0, Total=10712 [2020-07-17 12:17:54,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-07-17 12:17:54,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 222. [2020-07-17 12:17:54,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-17 12:17:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 237 transitions. [2020-07-17 12:17:54,783 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 237 transitions. Word has length 265 [2020-07-17 12:17:54,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:54,784 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 237 transitions. [2020-07-17 12:17:54,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-07-17 12:17:54,784 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 237 transitions. [2020-07-17 12:17:54,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-07-17 12:17:54,786 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:54,787 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:55,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-17 12:17:55,002 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:55,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:55,003 INFO L82 PathProgramCache]: Analyzing trace with hash -993908027, now seen corresponding path program 37 times [2020-07-17 12:17:55,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:55,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032549235] [2020-07-17 12:17:55,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 1300 proven. 650 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-07-17 12:17:56,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032549235] [2020-07-17 12:17:56,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585639165] [2020-07-17 12:17:56,610 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:56,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 54 conjunts are in the unsatisfiable core [2020-07-17 12:17:56,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 1300 proven. 650 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-07-17 12:17:59,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:59,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 80 [2020-07-17 12:17:59,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939708928] [2020-07-17 12:17:59,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-07-17 12:17:59,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:59,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-07-17 12:17:59,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4837, Unknown=0, NotChecked=0, Total=6320 [2020-07-17 12:17:59,110 INFO L87 Difference]: Start difference. First operand 222 states and 237 transitions. Second operand 80 states. [2020-07-17 12:18:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:18:01,513 INFO L93 Difference]: Finished difference Result 439 states and 532 transitions. [2020-07-17 12:18:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-17 12:18:01,513 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 267 [2020-07-17 12:18:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:18:01,516 INFO L225 Difference]: With dead ends: 439 [2020-07-17 12:18:01,516 INFO L226 Difference]: Without dead ends: 328 [2020-07-17 12:18:01,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2913, Invalid=8217, Unknown=0, NotChecked=0, Total=11130 [2020-07-17 12:18:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-07-17 12:18:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 224. [2020-07-17 12:18:01,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-07-17 12:18:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 239 transitions. [2020-07-17 12:18:01,533 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 239 transitions. Word has length 267 [2020-07-17 12:18:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:18:01,533 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 239 transitions. [2020-07-17 12:18:01,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-07-17 12:18:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 239 transitions. [2020-07-17 12:18:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-07-17 12:18:01,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:18:01,535 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:18:01,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-17 12:18:01,747 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:18:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:18:01,748 INFO L82 PathProgramCache]: Analyzing trace with hash -948700630, now seen corresponding path program 38 times [2020-07-17 12:18:01,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:18:01,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613738821] [2020-07-17 12:18:01,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:18:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 752 proven. 1250 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-07-17 12:18:02,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613738821] [2020-07-17 12:18:02,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245445009] [2020-07-17 12:18:02,678 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:02,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:18:02,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:18:02,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-17 12:18:02,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:18:02,845 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:18:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 752 proven. 1250 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-07-17 12:18:03,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:18:03,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2020-07-17 12:18:03,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30411866] [2020-07-17 12:18:03,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-17 12:18:03,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:18:03,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-17 12:18:03,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=640, Unknown=0, NotChecked=0, Total=1056 [2020-07-17 12:18:03,020 INFO L87 Difference]: Start difference. First operand 224 states and 239 transitions. Second operand 33 states. [2020-07-17 12:18:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:18:03,608 INFO L93 Difference]: Finished difference Result 239 states and 255 transitions. [2020-07-17 12:18:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-17 12:18:03,610 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 269 [2020-07-17 12:18:03,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:18:03,613 INFO L225 Difference]: With dead ends: 239 [2020-07-17 12:18:03,613 INFO L226 Difference]: Without dead ends: 237 [2020-07-17 12:18:03,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=422, Invalid=700, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 12:18:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-17 12:18:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2020-07-17 12:18:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-17 12:18:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 252 transitions. [2020-07-17 12:18:03,637 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 252 transitions. Word has length 269 [2020-07-17 12:18:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:18:03,640 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 252 transitions. [2020-07-17 12:18:03,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-17 12:18:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 252 transitions. [2020-07-17 12:18:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-07-17 12:18:03,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:18:03,645 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:18:03,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:03,861 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:18:03,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:18:03,862 INFO L82 PathProgramCache]: Analyzing trace with hash 167610380, now seen corresponding path program 39 times [2020-07-17 12:18:03,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:18:03,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61708156] [2020-07-17 12:18:03,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:18:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 1512 proven. 702 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-07-17 12:18:06,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61708156] [2020-07-17 12:18:06,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378512137] [2020-07-17 12:18:06,098 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:06,261 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-07-17 12:18:06,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:18:06,265 INFO L264 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-17 12:18:06,269 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:18:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 1512 proven. 702 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-07-17 12:18:08,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:18:08,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 85 [2020-07-17 12:18:08,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400220016] [2020-07-17 12:18:08,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-07-17 12:18:08,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:18:08,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-07-17 12:18:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1680, Invalid=5460, Unknown=0, NotChecked=0, Total=7140 [2020-07-17 12:18:08,874 INFO L87 Difference]: Start difference. First operand 236 states and 252 transitions. Second operand 85 states. [2020-07-17 12:18:11,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:18:11,642 INFO L93 Difference]: Finished difference Result 467 states and 564 transitions. [2020-07-17 12:18:11,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-07-17 12:18:11,643 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 285 [2020-07-17 12:18:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:18:11,646 INFO L225 Difference]: With dead ends: 467 [2020-07-17 12:18:11,647 INFO L226 Difference]: Without dead ends: 346 [2020-07-17 12:18:11,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3219, Invalid=9213, Unknown=0, NotChecked=0, Total=12432 [2020-07-17 12:18:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-07-17 12:18:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 238. [2020-07-17 12:18:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-17 12:18:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 254 transitions. [2020-07-17 12:18:11,664 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 254 transitions. Word has length 285 [2020-07-17 12:18:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:18:11,664 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 254 transitions. [2020-07-17 12:18:11,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-07-17 12:18:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 254 transitions. [2020-07-17 12:18:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-17 12:18:11,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:18:11,666 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:18:11,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:11,880 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:18:11,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:18:11,881 INFO L82 PathProgramCache]: Analyzing trace with hash 196225073, now seen corresponding path program 40 times [2020-07-17 12:18:11,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:18:11,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618769438] [2020-07-17 12:18:11,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:18:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3672 backedges. 1512 proven. 756 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-07-17 12:18:14,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618769438] [2020-07-17 12:18:14,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946106013] [2020-07-17 12:18:14,322 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:14,475 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:18:14,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:18:14,483 INFO L264 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 58 conjunts are in the unsatisfiable core [2020-07-17 12:18:14,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:18:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3672 backedges. 1512 proven. 756 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-07-17 12:18:17,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:18:17,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 86 [2020-07-17 12:18:17,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092218511] [2020-07-17 12:18:17,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-07-17 12:18:17,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:18:17,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-07-17 12:18:17,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1709, Invalid=5601, Unknown=0, NotChecked=0, Total=7310 [2020-07-17 12:18:17,447 INFO L87 Difference]: Start difference. First operand 238 states and 254 transitions. Second operand 86 states. [2020-07-17 12:18:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:18:20,054 INFO L93 Difference]: Finished difference Result 471 states and 571 transitions. [2020-07-17 12:18:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-07-17 12:18:20,054 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 287 [2020-07-17 12:18:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:18:20,056 INFO L225 Difference]: With dead ends: 471 [2020-07-17 12:18:20,056 INFO L226 Difference]: Without dead ends: 352 [2020-07-17 12:18:20,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2592 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3361, Invalid=9521, Unknown=0, NotChecked=0, Total=12882 [2020-07-17 12:18:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-07-17 12:18:20,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 240. [2020-07-17 12:18:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-07-17 12:18:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 256 transitions. [2020-07-17 12:18:20,070 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 256 transitions. Word has length 287 [2020-07-17 12:18:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:18:20,070 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 256 transitions. [2020-07-17 12:18:20,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-07-17 12:18:20,070 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 256 transitions. [2020-07-17 12:18:20,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-07-17 12:18:20,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:18:20,072 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:18:20,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:20,286 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:18:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:18:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1925141270, now seen corresponding path program 41 times [2020-07-17 12:18:20,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:18:20,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802059792] [2020-07-17 12:18:20,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:18:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 866 proven. 1458 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-07-17 12:18:21,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802059792] [2020-07-17 12:18:21,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662796087] [2020-07-17 12:18:21,314 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:21,516 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-07-17 12:18:21,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:18:21,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-17 12:18:21,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:18:21,542 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:18:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 866 proven. 1458 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-07-17 12:18:21,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:18:21,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2020-07-17 12:18:21,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901156889] [2020-07-17 12:18:21,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-17 12:18:21,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:18:21,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-17 12:18:21,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 12:18:21,682 INFO L87 Difference]: Start difference. First operand 240 states and 256 transitions. Second operand 35 states. [2020-07-17 12:18:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:18:22,141 INFO L93 Difference]: Finished difference Result 255 states and 272 transitions. [2020-07-17 12:18:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-17 12:18:22,143 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 289 [2020-07-17 12:18:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:18:22,147 INFO L225 Difference]: With dead ends: 255 [2020-07-17 12:18:22,147 INFO L226 Difference]: Without dead ends: 253 [2020-07-17 12:18:22,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=481, Invalid=779, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 12:18:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-07-17 12:18:22,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2020-07-17 12:18:22,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-07-17 12:18:22,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 269 transitions. [2020-07-17 12:18:22,162 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 269 transitions. Word has length 289 [2020-07-17 12:18:22,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:18:22,162 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 269 transitions. [2020-07-17 12:18:22,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-17 12:18:22,162 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 269 transitions. [2020-07-17 12:18:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-07-17 12:18:22,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:18:22,166 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:18:22,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-07-17 12:18:22,379 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:18:22,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:18:22,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2144237320, now seen corresponding path program 42 times [2020-07-17 12:18:22,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:18:22,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090255119] [2020-07-17 12:18:22,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:18:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4176 backedges. 1740 proven. 812 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-07-17 12:18:24,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090255119] [2020-07-17 12:18:24,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933112848] [2020-07-17 12:18:24,881 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:25,063 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2020-07-17 12:18:25,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:18:25,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 61 conjunts are in the unsatisfiable core [2020-07-17 12:18:25,070 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:18:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4176 backedges. 1740 proven. 812 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-07-17 12:18:28,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:18:28,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2020-07-17 12:18:28,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191278731] [2020-07-17 12:18:28,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-07-17 12:18:28,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:18:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-07-17 12:18:28,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1920, Invalid=6270, Unknown=0, NotChecked=0, Total=8190 [2020-07-17 12:18:28,420 INFO L87 Difference]: Start difference. First operand 252 states and 269 transitions. Second operand 91 states. [2020-07-17 12:18:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:18:31,783 INFO L93 Difference]: Finished difference Result 499 states and 603 transitions. [2020-07-17 12:18:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-17 12:18:31,784 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 305 [2020-07-17 12:18:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:18:31,786 INFO L225 Difference]: With dead ends: 499 [2020-07-17 12:18:31,787 INFO L226 Difference]: Without dead ends: 370 [2020-07-17 12:18:31,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3689, Invalid=10591, Unknown=0, NotChecked=0, Total=14280 [2020-07-17 12:18:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-07-17 12:18:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 254. [2020-07-17 12:18:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-07-17 12:18:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 271 transitions. [2020-07-17 12:18:31,801 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 271 transitions. Word has length 305 [2020-07-17 12:18:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:18:31,802 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 271 transitions. [2020-07-17 12:18:31,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-07-17 12:18:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 271 transitions. [2020-07-17 12:18:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-07-17 12:18:31,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:18:31,804 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:18:32,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:32,020 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:18:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:18:32,021 INFO L82 PathProgramCache]: Analyzing trace with hash 191997085, now seen corresponding path program 43 times [2020-07-17 12:18:32,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:18:32,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392239155] [2020-07-17 12:18:32,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:18:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4234 backedges. 1740 proven. 870 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-07-17 12:18:34,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392239155] [2020-07-17 12:18:34,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094558231] [2020-07-17 12:18:34,623 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:34,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 62 conjunts are in the unsatisfiable core [2020-07-17 12:18:34,769 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:18:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4234 backedges. 1740 proven. 870 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-07-17 12:18:38,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:18:38,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 92 [2020-07-17 12:18:38,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346541187] [2020-07-17 12:18:38,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-07-17 12:18:38,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:18:38,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-07-17 12:18:38,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=6421, Unknown=0, NotChecked=0, Total=8372 [2020-07-17 12:18:38,188 INFO L87 Difference]: Start difference. First operand 254 states and 271 transitions. Second operand 92 states. [2020-07-17 12:18:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:18:41,658 INFO L93 Difference]: Finished difference Result 503 states and 610 transitions. [2020-07-17 12:18:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-07-17 12:18:41,658 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 307 [2020-07-17 12:18:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:18:41,660 INFO L225 Difference]: With dead ends: 503 [2020-07-17 12:18:41,660 INFO L226 Difference]: Without dead ends: 376 [2020-07-17 12:18:41,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3841, Invalid=10921, Unknown=0, NotChecked=0, Total=14762 [2020-07-17 12:18:41,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-07-17 12:18:41,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 256. [2020-07-17 12:18:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-17 12:18:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 273 transitions. [2020-07-17 12:18:41,684 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 273 transitions. Word has length 307 [2020-07-17 12:18:41,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:18:41,685 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 273 transitions. [2020-07-17 12:18:41,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-07-17 12:18:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 273 transitions. [2020-07-17 12:18:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-07-17 12:18:41,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:18:41,689 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:18:41,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:41,903 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:18:41,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:18:41,904 INFO L82 PathProgramCache]: Analyzing trace with hash -954635518, now seen corresponding path program 44 times [2020-07-17 12:18:41,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:18:41,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266718914] [2020-07-17 12:18:41,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:18:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 988 proven. 1682 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-07-17 12:18:43,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266718914] [2020-07-17 12:18:43,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648916771] [2020-07-17 12:18:43,408 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:43,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:18:43,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:18:43,545 INFO L264 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-17 12:18:43,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:18:43,568 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:18:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 988 proven. 1682 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-07-17 12:18:43,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:18:43,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2020-07-17 12:18:43,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999998373] [2020-07-17 12:18:43,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-17 12:18:43,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:18:43,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-17 12:18:43,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=794, Unknown=0, NotChecked=0, Total=1332 [2020-07-17 12:18:43,690 INFO L87 Difference]: Start difference. First operand 256 states and 273 transitions. Second operand 37 states. [2020-07-17 12:18:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:18:44,299 INFO L93 Difference]: Finished difference Result 271 states and 289 transitions. [2020-07-17 12:18:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-17 12:18:44,300 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 309 [2020-07-17 12:18:44,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:18:44,303 INFO L225 Difference]: With dead ends: 271 [2020-07-17 12:18:44,303 INFO L226 Difference]: Without dead ends: 269 [2020-07-17 12:18:44,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2020-07-17 12:18:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-17 12:18:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2020-07-17 12:18:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-07-17 12:18:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 286 transitions. [2020-07-17 12:18:44,320 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 286 transitions. Word has length 309 [2020-07-17 12:18:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:18:44,321 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 286 transitions. [2020-07-17 12:18:44,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-17 12:18:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 286 transitions. [2020-07-17 12:18:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-07-17 12:18:44,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:18:44,324 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:18:44,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-07-17 12:18:44,537 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:18:44,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:18:44,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2146023196, now seen corresponding path program 45 times [2020-07-17 12:18:44,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:18:44,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091423801] [2020-07-17 12:18:44,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:18:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1984 proven. 930 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-17 12:18:47,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091423801] [2020-07-17 12:18:47,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784552012] [2020-07-17 12:18:47,805 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:48,062 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2020-07-17 12:18:48,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:18:48,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-17 12:18:48,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:18:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1984 proven. 930 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-17 12:18:52,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:18:52,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 97 [2020-07-17 12:18:52,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781494310] [2020-07-17 12:18:52,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-07-17 12:18:52,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:18:52,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-07-17 12:18:52,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2176, Invalid=7136, Unknown=0, NotChecked=0, Total=9312 [2020-07-17 12:18:52,353 INFO L87 Difference]: Start difference. First operand 268 states and 286 transitions. Second operand 97 states. [2020-07-17 12:18:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:18:55,285 INFO L93 Difference]: Finished difference Result 531 states and 642 transitions. [2020-07-17 12:18:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-07-17 12:18:55,287 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 325 [2020-07-17 12:18:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:18:55,289 INFO L225 Difference]: With dead ends: 531 [2020-07-17 12:18:55,290 INFO L226 Difference]: Without dead ends: 394 [2020-07-17 12:18:55,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3346 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=4191, Invalid=12065, Unknown=0, NotChecked=0, Total=16256 [2020-07-17 12:18:55,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-07-17 12:18:55,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 270. [2020-07-17 12:18:55,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-17 12:18:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 288 transitions. [2020-07-17 12:18:55,311 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 288 transitions. Word has length 325 [2020-07-17 12:18:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:18:55,312 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 288 transitions. [2020-07-17 12:18:55,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-07-17 12:18:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 288 transitions. [2020-07-17 12:18:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-17 12:18:55,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:18:55,316 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:18:55,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-07-17 12:18:55,530 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:18:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:18:55,531 INFO L82 PathProgramCache]: Analyzing trace with hash 735125513, now seen corresponding path program 46 times [2020-07-17 12:18:55,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:18:55,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110064724] [2020-07-17 12:18:55,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:18:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:18:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4836 backedges. 1984 proven. 992 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-17 12:18:58,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110064724] [2020-07-17 12:18:58,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476079720] [2020-07-17 12:18:58,695 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:18:58,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:18:58,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:18:58,850 INFO L264 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 66 conjunts are in the unsatisfiable core [2020-07-17 12:18:58,853 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:19:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4836 backedges. 1984 proven. 992 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-17 12:19:02,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:19:02,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 98 [2020-07-17 12:19:02,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143881780] [2020-07-17 12:19:02,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-07-17 12:19:02,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:19:02,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-07-17 12:19:02,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2209, Invalid=7297, Unknown=0, NotChecked=0, Total=9506 [2020-07-17 12:19:02,402 INFO L87 Difference]: Start difference. First operand 270 states and 288 transitions. Second operand 98 states. [2020-07-17 12:19:06,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:19:06,286 INFO L93 Difference]: Finished difference Result 535 states and 649 transitions. [2020-07-17 12:19:06,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-17 12:19:06,287 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 327 [2020-07-17 12:19:06,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:19:06,289 INFO L225 Difference]: With dead ends: 535 [2020-07-17 12:19:06,289 INFO L226 Difference]: Without dead ends: 400 [2020-07-17 12:19:06,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3410 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=4353, Invalid=12417, Unknown=0, NotChecked=0, Total=16770 [2020-07-17 12:19:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-07-17 12:19:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 272. [2020-07-17 12:19:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-07-17 12:19:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 290 transitions. [2020-07-17 12:19:06,311 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 290 transitions. Word has length 327 [2020-07-17 12:19:06,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:19:06,311 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 290 transitions. [2020-07-17 12:19:06,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-07-17 12:19:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 290 transitions. [2020-07-17 12:19:06,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-17 12:19:06,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:19:06,315 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:19:06,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-07-17 12:19:06,529 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:19:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:19:06,530 INFO L82 PathProgramCache]: Analyzing trace with hash -734871058, now seen corresponding path program 47 times [2020-07-17 12:19:06,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:19:06,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023032175] [2020-07-17 12:19:06,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:19:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1118 proven. 1922 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-17 12:19:07,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023032175] [2020-07-17 12:19:07,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989965010] [2020-07-17 12:19:07,851 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:19:08,056 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-07-17 12:19:08,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:19:08,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-17 12:19:08,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:19:08,083 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:19:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1118 proven. 1922 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-17 12:19:08,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:19:08,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2020-07-17 12:19:08,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351468131] [2020-07-17 12:19:08,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-17 12:19:08,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:19:08,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-17 12:19:08,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=877, Unknown=0, NotChecked=0, Total=1482 [2020-07-17 12:19:08,218 INFO L87 Difference]: Start difference. First operand 272 states and 290 transitions. Second operand 39 states. [2020-07-17 12:19:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:19:08,829 INFO L93 Difference]: Finished difference Result 287 states and 306 transitions. [2020-07-17 12:19:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-17 12:19:08,831 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 329 [2020-07-17 12:19:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:19:08,833 INFO L225 Difference]: With dead ends: 287 [2020-07-17 12:19:08,834 INFO L226 Difference]: Without dead ends: 285 [2020-07-17 12:19:08,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=611, Invalid=949, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 12:19:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-17 12:19:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2020-07-17 12:19:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-07-17 12:19:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 303 transitions. [2020-07-17 12:19:08,851 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 303 transitions. Word has length 329 [2020-07-17 12:19:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:19:08,852 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 303 transitions. [2020-07-17 12:19:08,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-17 12:19:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 303 transitions. [2020-07-17 12:19:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-17 12:19:08,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:19:08,855 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:19:09,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:19:09,069 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:19:09,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:19:09,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1470347312, now seen corresponding path program 48 times [2020-07-17 12:19:09,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:19:09,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581915918] [2020-07-17 12:19:09,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:19:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 2244 proven. 1056 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-07-17 12:19:12,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581915918] [2020-07-17 12:19:12,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712920285] [2020-07-17 12:19:12,654 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:19:12,858 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2020-07-17 12:19:12,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:19:12,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-17 12:19:12,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:19:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 2244 proven. 1056 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-07-17 12:19:17,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:19:17,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 103 [2020-07-17 12:19:17,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494170528] [2020-07-17 12:19:17,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-17 12:19:17,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:19:17,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-17 12:19:17,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2448, Invalid=8058, Unknown=0, NotChecked=0, Total=10506 [2020-07-17 12:19:17,507 INFO L87 Difference]: Start difference. First operand 284 states and 303 transitions. Second operand 103 states. [2020-07-17 12:19:22,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:19:22,143 INFO L93 Difference]: Finished difference Result 563 states and 681 transitions. [2020-07-17 12:19:22,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-07-17 12:19:22,144 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 345 [2020-07-17 12:19:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:19:22,146 INFO L225 Difference]: With dead ends: 563 [2020-07-17 12:19:22,146 INFO L226 Difference]: Without dead ends: 418 [2020-07-17 12:19:22,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3793 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=4725, Invalid=13635, Unknown=0, NotChecked=0, Total=18360 [2020-07-17 12:19:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-07-17 12:19:22,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 286. [2020-07-17 12:19:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-07-17 12:19:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 305 transitions. [2020-07-17 12:19:22,169 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 305 transitions. Word has length 345 [2020-07-17 12:19:22,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:19:22,170 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 305 transitions. [2020-07-17 12:19:22,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-07-17 12:19:22,170 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 305 transitions. [2020-07-17 12:19:22,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-17 12:19:22,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:19:22,174 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:19:22,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:19:22,389 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:19:22,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:19:22,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2069961333, now seen corresponding path program 49 times [2020-07-17 12:19:22,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:19:22,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685082528] [2020-07-17 12:19:22,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:19:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5478 backedges. 2244 proven. 1122 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-07-17 12:19:26,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685082528] [2020-07-17 12:19:26,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833488242] [2020-07-17 12:19:26,019 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:19:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:26,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 70 conjunts are in the unsatisfiable core [2020-07-17 12:19:26,166 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:19:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5478 backedges. 2244 proven. 1122 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-07-17 12:19:31,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:19:31,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 104 [2020-07-17 12:19:31,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848493126] [2020-07-17 12:19:31,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-07-17 12:19:31,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:19:31,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-07-17 12:19:31,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2483, Invalid=8229, Unknown=0, NotChecked=0, Total=10712 [2020-07-17 12:19:31,052 INFO L87 Difference]: Start difference. First operand 286 states and 305 transitions. Second operand 104 states. [2020-07-17 12:19:35,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:19:35,824 INFO L93 Difference]: Finished difference Result 567 states and 688 transitions. [2020-07-17 12:19:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-07-17 12:19:35,824 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 347 [2020-07-17 12:19:35,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:19:35,826 INFO L225 Difference]: With dead ends: 567 [2020-07-17 12:19:35,826 INFO L226 Difference]: Without dead ends: 424 [2020-07-17 12:19:35,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=4897, Invalid=14009, Unknown=0, NotChecked=0, Total=18906 [2020-07-17 12:19:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-07-17 12:19:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 288. [2020-07-17 12:19:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-07-17 12:19:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 307 transitions. [2020-07-17 12:19:35,845 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 307 transitions. Word has length 347 [2020-07-17 12:19:35,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:19:35,846 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 307 transitions. [2020-07-17 12:19:35,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-07-17 12:19:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 307 transitions. [2020-07-17 12:19:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-07-17 12:19:35,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:19:35,848 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:19:36,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:19:36,062 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:19:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:19:36,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1602496550, now seen corresponding path program 50 times [2020-07-17 12:19:36,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:19:36,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296746123] [2020-07-17 12:19:36,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:19:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5546 backedges. 1256 proven. 2178 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-07-17 12:19:37,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296746123] [2020-07-17 12:19:37,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267135160] [2020-07-17 12:19:37,580 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:19:37,751 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:19:37,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:19:37,756 INFO L264 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 71 conjunts are in the unsatisfiable core [2020-07-17 12:19:37,765 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:19:37,790 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:19:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5546 backedges. 1256 proven. 2178 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-07-17 12:19:38,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:19:38,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2020-07-17 12:19:38,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877545341] [2020-07-17 12:19:38,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-17 12:19:38,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:19:38,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-17 12:19:38,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=964, Unknown=0, NotChecked=0, Total=1640 [2020-07-17 12:19:38,026 INFO L87 Difference]: Start difference. First operand 288 states and 307 transitions. Second operand 41 states. [2020-07-17 12:19:38,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:19:38,697 INFO L93 Difference]: Finished difference Result 303 states and 323 transitions. [2020-07-17 12:19:38,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-17 12:19:38,700 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 349 [2020-07-17 12:19:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:19:38,703 INFO L225 Difference]: With dead ends: 303 [2020-07-17 12:19:38,703 INFO L226 Difference]: Without dead ends: 301 [2020-07-17 12:19:38,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=682, Invalid=1040, Unknown=0, NotChecked=0, Total=1722 [2020-07-17 12:19:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-07-17 12:19:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 300. [2020-07-17 12:19:38,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-07-17 12:19:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 320 transitions. [2020-07-17 12:19:38,714 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 320 transitions. Word has length 349 [2020-07-17 12:19:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:19:38,714 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 320 transitions. [2020-07-17 12:19:38,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-17 12:19:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 320 transitions. [2020-07-17 12:19:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-07-17 12:19:38,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:19:38,718 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:19:38,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:19:38,932 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:19:38,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:19:38,932 INFO L82 PathProgramCache]: Analyzing trace with hash 242484668, now seen corresponding path program 51 times [2020-07-17 12:19:38,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:19:38,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341721822] [2020-07-17 12:19:38,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:19:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6090 backedges. 2520 proven. 1190 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-07-17 12:19:43,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341721822] [2020-07-17 12:19:43,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014569737] [2020-07-17 12:19:43,020 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:19:43,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2020-07-17 12:19:43,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:19:43,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 73 conjunts are in the unsatisfiable core [2020-07-17 12:19:43,252 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:19:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6090 backedges. 2520 proven. 1190 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-07-17 12:19:48,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:19:48,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 109 [2020-07-17 12:19:48,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649025310] [2020-07-17 12:19:48,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2020-07-17 12:19:48,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:19:48,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2020-07-17 12:19:48,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2736, Invalid=9036, Unknown=0, NotChecked=0, Total=11772 [2020-07-17 12:19:48,543 INFO L87 Difference]: Start difference. First operand 300 states and 320 transitions. Second operand 109 states. [2020-07-17 12:19:52,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:19:52,729 INFO L93 Difference]: Finished difference Result 595 states and 720 transitions. [2020-07-17 12:19:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-17 12:19:52,730 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 365 [2020-07-17 12:19:52,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:19:52,733 INFO L225 Difference]: With dead ends: 595 [2020-07-17 12:19:52,733 INFO L226 Difference]: Without dead ends: 442 [2020-07-17 12:19:52,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4268 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=5291, Invalid=15301, Unknown=0, NotChecked=0, Total=20592 [2020-07-17 12:19:52,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-07-17 12:19:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 302. [2020-07-17 12:19:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-07-17 12:19:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 322 transitions. [2020-07-17 12:19:52,753 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 322 transitions. Word has length 365 [2020-07-17 12:19:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:19:52,754 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 322 transitions. [2020-07-17 12:19:52,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 109 states. [2020-07-17 12:19:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 322 transitions. [2020-07-17 12:19:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-17 12:19:52,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:19:52,757 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:19:52,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-07-17 12:19:52,959 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:19:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:19:52,959 INFO L82 PathProgramCache]: Analyzing trace with hash -814607391, now seen corresponding path program 52 times [2020-07-17 12:19:52,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:19:52,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913566766] [2020-07-17 12:19:52,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:19:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2520 proven. 1260 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-07-17 12:19:59,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913566766] [2020-07-17 12:19:59,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336856152] [2020-07-17 12:19:59,157 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:19:59,354 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:19:59,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:19:59,361 INFO L264 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 74 conjunts are in the unsatisfiable core [2020-07-17 12:19:59,367 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:20:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2520 proven. 1260 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-07-17 12:20:05,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:20:05,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 110 [2020-07-17 12:20:05,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740083602] [2020-07-17 12:20:05,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-07-17 12:20:05,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:20:05,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-07-17 12:20:05,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2773, Invalid=9217, Unknown=0, NotChecked=0, Total=11990 [2020-07-17 12:20:05,465 INFO L87 Difference]: Start difference. First operand 302 states and 322 transitions. Second operand 110 states. [2020-07-17 12:20:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:20:10,257 INFO L93 Difference]: Finished difference Result 599 states and 727 transitions. [2020-07-17 12:20:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-07-17 12:20:10,258 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 367 [2020-07-17 12:20:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:20:10,260 INFO L225 Difference]: With dead ends: 599 [2020-07-17 12:20:10,260 INFO L226 Difference]: Without dead ends: 448 [2020-07-17 12:20:10,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=5473, Invalid=15697, Unknown=0, NotChecked=0, Total=21170 [2020-07-17 12:20:10,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-07-17 12:20:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 304. [2020-07-17 12:20:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-07-17 12:20:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 324 transitions. [2020-07-17 12:20:10,286 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 324 transitions. Word has length 367 [2020-07-17 12:20:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:20:10,286 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 324 transitions. [2020-07-17 12:20:10,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-07-17 12:20:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 324 transitions. [2020-07-17 12:20:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-07-17 12:20:10,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:20:10,291 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:20:10,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:20:10,505 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:20:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:20:10,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1227173062, now seen corresponding path program 53 times [2020-07-17 12:20:10,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:20:10,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139326074] [2020-07-17 12:20:10,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:20:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6232 backedges. 1402 proven. 2450 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-07-17 12:20:12,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139326074] [2020-07-17 12:20:12,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182814268] [2020-07-17 12:20:12,613 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:20:12,814 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-07-17 12:20:12,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:20:12,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 75 conjunts are in the unsatisfiable core [2020-07-17 12:20:12,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:20:12,838 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:20:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6232 backedges. 1402 proven. 2450 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-07-17 12:20:12,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:20:12,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2020-07-17 12:20:12,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362466836] [2020-07-17 12:20:12,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-17 12:20:12,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:20:12,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-17 12:20:12,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=1055, Unknown=0, NotChecked=0, Total=1806 [2020-07-17 12:20:12,978 INFO L87 Difference]: Start difference. First operand 304 states and 324 transitions. Second operand 43 states. [2020-07-17 12:20:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:20:13,631 INFO L93 Difference]: Finished difference Result 319 states and 340 transitions. [2020-07-17 12:20:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-17 12:20:13,632 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 369 [2020-07-17 12:20:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:20:13,634 INFO L225 Difference]: With dead ends: 319 [2020-07-17 12:20:13,634 INFO L226 Difference]: Without dead ends: 317 [2020-07-17 12:20:13,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=757, Invalid=1135, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 12:20:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-07-17 12:20:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2020-07-17 12:20:13,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-07-17 12:20:13,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 337 transitions. [2020-07-17 12:20:13,647 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 337 transitions. Word has length 369 [2020-07-17 12:20:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:20:13,648 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 337 transitions. [2020-07-17 12:20:13,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-17 12:20:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 337 transitions. [2020-07-17 12:20:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-07-17 12:20:13,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:20:13,651 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:20:13,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-07-17 12:20:13,853 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:20:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:20:13,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1586365096, now seen corresponding path program 54 times [2020-07-17 12:20:13,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:20:13,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705972088] [2020-07-17 12:20:13,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:20:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6808 backedges. 2812 proven. 1332 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-07-17 12:20:18,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705972088] [2020-07-17 12:20:18,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012279544] [2020-07-17 12:20:18,114 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:20:18,340 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2020-07-17 12:20:18,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:20:18,344 INFO L264 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 77 conjunts are in the unsatisfiable core [2020-07-17 12:20:18,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:20:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6808 backedges. 2812 proven. 1332 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-07-17 12:20:23,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:20:23,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 115 [2020-07-17 12:20:23,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919652719] [2020-07-17 12:20:23,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2020-07-17 12:20:23,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:20:23,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2020-07-17 12:20:23,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3040, Invalid=10070, Unknown=0, NotChecked=0, Total=13110 [2020-07-17 12:20:23,731 INFO L87 Difference]: Start difference. First operand 316 states and 337 transitions. Second operand 115 states. [2020-07-17 12:20:31,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:20:31,558 INFO L93 Difference]: Finished difference Result 627 states and 759 transitions. [2020-07-17 12:20:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-07-17 12:20:31,561 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 385 [2020-07-17 12:20:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:20:31,566 INFO L225 Difference]: With dead ends: 627 [2020-07-17 12:20:31,566 INFO L226 Difference]: Without dead ends: 466 [2020-07-17 12:20:31,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4771 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=5889, Invalid=17063, Unknown=0, NotChecked=0, Total=22952 [2020-07-17 12:20:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-07-17 12:20:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 318. [2020-07-17 12:20:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-07-17 12:20:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 339 transitions. [2020-07-17 12:20:31,596 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 339 transitions. Word has length 385 [2020-07-17 12:20:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:20:31,596 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 339 transitions. [2020-07-17 12:20:31,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 115 states. [2020-07-17 12:20:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 339 transitions. [2020-07-17 12:20:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-07-17 12:20:31,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:20:31,601 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:20:31,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-07-17 12:20:31,815 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:20:31,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:20:31,816 INFO L82 PathProgramCache]: Analyzing trace with hash -468415411, now seen corresponding path program 55 times [2020-07-17 12:20:31,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:20:31,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829305714] [2020-07-17 12:20:31,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:20:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6882 backedges. 2812 proven. 1406 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-07-17 12:20:39,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829305714] [2020-07-17 12:20:39,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510468028] [2020-07-17 12:20:39,102 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:20:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:39,316 INFO L264 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 78 conjunts are in the unsatisfiable core [2020-07-17 12:20:39,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:20:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6882 backedges. 2812 proven. 1406 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-07-17 12:20:46,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:20:46,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 116 [2020-07-17 12:20:46,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653935103] [2020-07-17 12:20:46,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-07-17 12:20:46,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:20:46,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-07-17 12:20:46,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=10261, Unknown=0, NotChecked=0, Total=13340 [2020-07-17 12:20:46,036 INFO L87 Difference]: Start difference. First operand 318 states and 339 transitions. Second operand 116 states. [2020-07-17 12:20:51,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:20:51,229 INFO L93 Difference]: Finished difference Result 631 states and 766 transitions. [2020-07-17 12:20:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-07-17 12:20:51,229 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 387 [2020-07-17 12:20:51,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:20:51,232 INFO L225 Difference]: With dead ends: 631 [2020-07-17 12:20:51,232 INFO L226 Difference]: Without dead ends: 472 [2020-07-17 12:20:51,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4847 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=6081, Invalid=17481, Unknown=0, NotChecked=0, Total=23562 [2020-07-17 12:20:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-07-17 12:20:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 320. [2020-07-17 12:20:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-07-17 12:20:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 341 transitions. [2020-07-17 12:20:51,250 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 341 transitions. Word has length 387 [2020-07-17 12:20:51,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:20:51,250 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 341 transitions. [2020-07-17 12:20:51,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-07-17 12:20:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 341 transitions. [2020-07-17 12:20:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-17 12:20:51,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:20:51,254 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:20:51,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:20:51,455 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:20:51,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:20:51,455 INFO L82 PathProgramCache]: Analyzing trace with hash 572473522, now seen corresponding path program 56 times [2020-07-17 12:20:51,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:20:51,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138746572] [2020-07-17 12:20:51,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:20:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6958 backedges. 1556 proven. 2738 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-07-17 12:20:53,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138746572] [2020-07-17 12:20:53,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777085550] [2020-07-17 12:20:53,372 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:20:53,534 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:20:53,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:20:53,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-17 12:20:53,545 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:20:53,567 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:20:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6958 backedges. 1556 proven. 2738 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-07-17 12:20:53,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:20:53,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 45 [2020-07-17 12:20:53,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959703976] [2020-07-17 12:20:53,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-17 12:20:53,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:20:53,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-17 12:20:53,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=1150, Unknown=0, NotChecked=0, Total=1980 [2020-07-17 12:20:53,742 INFO L87 Difference]: Start difference. First operand 320 states and 341 transitions. Second operand 45 states. [2020-07-17 12:20:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:20:54,500 INFO L93 Difference]: Finished difference Result 335 states and 357 transitions. [2020-07-17 12:20:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-17 12:20:54,503 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 389 [2020-07-17 12:20:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:20:54,505 INFO L225 Difference]: With dead ends: 335 [2020-07-17 12:20:54,505 INFO L226 Difference]: Without dead ends: 333 [2020-07-17 12:20:54,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=836, Invalid=1234, Unknown=0, NotChecked=0, Total=2070 [2020-07-17 12:20:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-07-17 12:20:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 332. [2020-07-17 12:20:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-07-17 12:20:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 354 transitions. [2020-07-17 12:20:54,522 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 354 transitions. Word has length 389 [2020-07-17 12:20:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:20:54,523 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 354 transitions. [2020-07-17 12:20:54,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-17 12:20:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 354 transitions. [2020-07-17 12:20:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2020-07-17 12:20:54,525 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:20:54,525 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:20:54,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-07-17 12:20:54,726 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:20:54,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:20:54,726 INFO L82 PathProgramCache]: Analyzing trace with hash -73744748, now seen corresponding path program 57 times [2020-07-17 12:20:54,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:20:54,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970791018] [2020-07-17 12:20:54,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:20:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7566 backedges. 3120 proven. 1482 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-07-17 12:20:59,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970791018] [2020-07-17 12:20:59,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247878272] [2020-07-17 12:20:59,571 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:20:59,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-07-17 12:20:59,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:20:59,804 INFO L264 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-17 12:20:59,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:21:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7566 backedges. 3120 proven. 1482 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-07-17 12:21:07,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:21:07,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 121 [2020-07-17 12:21:07,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120506527] [2020-07-17 12:21:07,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2020-07-17 12:21:07,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:21:07,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2020-07-17 12:21:07,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3360, Invalid=11160, Unknown=0, NotChecked=0, Total=14520 [2020-07-17 12:21:07,082 INFO L87 Difference]: Start difference. First operand 332 states and 354 transitions. Second operand 121 states. [2020-07-17 12:21:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:21:13,854 INFO L93 Difference]: Finished difference Result 659 states and 798 transitions. [2020-07-17 12:21:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-07-17 12:21:13,857 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 405 [2020-07-17 12:21:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:21:13,861 INFO L225 Difference]: With dead ends: 659 [2020-07-17 12:21:13,861 INFO L226 Difference]: Without dead ends: 490 [2020-07-17 12:21:13,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5302 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=6519, Invalid=18921, Unknown=0, NotChecked=0, Total=25440 [2020-07-17 12:21:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-17 12:21:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 334. [2020-07-17 12:21:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-07-17 12:21:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 356 transitions. [2020-07-17 12:21:13,889 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 356 transitions. Word has length 405 [2020-07-17 12:21:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:21:13,889 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 356 transitions. [2020-07-17 12:21:13,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 121 states. [2020-07-17 12:21:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 356 transitions. [2020-07-17 12:21:13,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-17 12:21:13,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:21:13,894 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:21:14,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:21:14,109 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:21:14,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:21:14,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2082014137, now seen corresponding path program 58 times [2020-07-17 12:21:14,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:21:14,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296676439] [2020-07-17 12:21:14,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:21:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7644 backedges. 3120 proven. 1560 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-07-17 12:21:22,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296676439] [2020-07-17 12:21:22,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57763579] [2020-07-17 12:21:22,703 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:21:22,891 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:21:22,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:21:22,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 82 conjunts are in the unsatisfiable core [2020-07-17 12:21:22,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:21:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7644 backedges. 3120 proven. 1560 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-07-17 12:21:31,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:21:31,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 122 [2020-07-17 12:21:31,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459383461] [2020-07-17 12:21:31,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-07-17 12:21:31,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:21:31,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-07-17 12:21:31,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3401, Invalid=11361, Unknown=0, NotChecked=0, Total=14762 [2020-07-17 12:21:31,351 INFO L87 Difference]: Start difference. First operand 334 states and 356 transitions. Second operand 122 states. [2020-07-17 12:21:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:21:36,791 INFO L93 Difference]: Finished difference Result 663 states and 805 transitions. [2020-07-17 12:21:36,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-07-17 12:21:36,791 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 407 [2020-07-17 12:21:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:21:36,794 INFO L225 Difference]: With dead ends: 663 [2020-07-17 12:21:36,794 INFO L226 Difference]: Without dead ends: 496 [2020-07-17 12:21:36,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5382 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=6721, Invalid=19361, Unknown=0, NotChecked=0, Total=26082 [2020-07-17 12:21:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-07-17 12:21:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 336. [2020-07-17 12:21:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-07-17 12:21:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 358 transitions. [2020-07-17 12:21:36,816 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 358 transitions. Word has length 407 [2020-07-17 12:21:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:21:36,816 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 358 transitions. [2020-07-17 12:21:36,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-07-17 12:21:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 358 transitions. [2020-07-17 12:21:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-17 12:21:36,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:21:36,818 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:21:37,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-07-17 12:21:37,019 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:21:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:21:37,020 INFO L82 PathProgramCache]: Analyzing trace with hash -702901346, now seen corresponding path program 59 times [2020-07-17 12:21:37,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:21:37,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266509844] [2020-07-17 12:21:37,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:21:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7724 backedges. 1718 proven. 3042 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-07-17 12:21:39,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266509844] [2020-07-17 12:21:39,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359714855] [2020-07-17 12:21:39,157 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:21:39,378 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-07-17 12:21:39,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:21:39,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 83 conjunts are in the unsatisfiable core [2020-07-17 12:21:39,386 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:21:39,403 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:21:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7724 backedges. 1718 proven. 3042 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-07-17 12:21:39,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:21:39,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 47 [2020-07-17 12:21:39,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835766898] [2020-07-17 12:21:39,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-17 12:21:39,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:21:39,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-17 12:21:39,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=913, Invalid=1249, Unknown=0, NotChecked=0, Total=2162 [2020-07-17 12:21:39,690 INFO L87 Difference]: Start difference. First operand 336 states and 358 transitions. Second operand 47 states. [2020-07-17 12:21:40,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:21:40,440 INFO L93 Difference]: Finished difference Result 351 states and 374 transitions. [2020-07-17 12:21:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-17 12:21:40,441 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 409 [2020-07-17 12:21:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:21:40,444 INFO L225 Difference]: With dead ends: 351 [2020-07-17 12:21:40,444 INFO L226 Difference]: Without dead ends: 349 [2020-07-17 12:21:40,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=919, Invalid=1337, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 12:21:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-07-17 12:21:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 348. [2020-07-17 12:21:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-07-17 12:21:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 371 transitions. [2020-07-17 12:21:40,460 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 371 transitions. Word has length 409 [2020-07-17 12:21:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:21:40,460 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 371 transitions. [2020-07-17 12:21:40,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-17 12:21:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 371 transitions. [2020-07-17 12:21:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-07-17 12:21:40,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:21:40,463 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:21:40,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:21:40,664 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:21:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:21:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash 524990848, now seen corresponding path program 60 times [2020-07-17 12:21:40,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:21:40,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684093369] [2020-07-17 12:21:40,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:21:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8364 backedges. 3444 proven. 1640 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2020-07-17 12:21:46,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684093369] [2020-07-17 12:21:46,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646978316] [2020-07-17 12:21:46,748 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:21:46,986 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2020-07-17 12:21:46,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:21:46,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 85 conjunts are in the unsatisfiable core [2020-07-17 12:21:46,995 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:21:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8364 backedges. 3444 proven. 1640 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2020-07-17 12:21:56,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:21:56,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 127 [2020-07-17 12:21:56,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113643958] [2020-07-17 12:21:56,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2020-07-17 12:21:56,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:21:56,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2020-07-17 12:21:56,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3696, Invalid=12306, Unknown=0, NotChecked=0, Total=16002 [2020-07-17 12:21:56,144 INFO L87 Difference]: Start difference. First operand 348 states and 371 transitions. Second operand 127 states. [2020-07-17 12:22:03,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:03,267 INFO L93 Difference]: Finished difference Result 691 states and 837 transitions. [2020-07-17 12:22:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-07-17 12:22:03,270 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 425 [2020-07-17 12:22:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:03,273 INFO L225 Difference]: With dead ends: 691 [2020-07-17 12:22:03,273 INFO L226 Difference]: Without dead ends: 514 [2020-07-17 12:22:03,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5861 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=7181, Invalid=20875, Unknown=0, NotChecked=0, Total=28056 [2020-07-17 12:22:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-07-17 12:22:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 350. [2020-07-17 12:22:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-07-17 12:22:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 373 transitions. [2020-07-17 12:22:03,331 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 373 transitions. Word has length 425 [2020-07-17 12:22:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:03,332 INFO L479 AbstractCegarLoop]: Abstraction has 350 states and 373 transitions. [2020-07-17 12:22:03,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 127 states. [2020-07-17 12:22:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 373 transitions. [2020-07-17 12:22:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2020-07-17 12:22:03,334 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:03,334 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:03,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-07-17 12:22:03,535 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:03,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2129659355, now seen corresponding path program 61 times [2020-07-17 12:22:03,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:03,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630364818] [2020-07-17 12:22:03,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8446 backedges. 3444 proven. 1722 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2020-07-17 12:22:09,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630364818] [2020-07-17 12:22:09,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457948121] [2020-07-17 12:22:09,526 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:22:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:09,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 86 conjunts are in the unsatisfiable core [2020-07-17 12:22:09,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:22:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8446 backedges. 3444 proven. 1722 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2020-07-17 12:22:17,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:22:17,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 128 [2020-07-17 12:22:17,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314523944] [2020-07-17 12:22:17,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2020-07-17 12:22:17,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:17,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2020-07-17 12:22:17,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3739, Invalid=12517, Unknown=0, NotChecked=0, Total=16256 [2020-07-17 12:22:17,600 INFO L87 Difference]: Start difference. First operand 350 states and 373 transitions. Second operand 128 states. [2020-07-17 12:22:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:23,332 INFO L93 Difference]: Finished difference Result 695 states and 844 transitions. [2020-07-17 12:22:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-07-17 12:22:23,332 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 427 [2020-07-17 12:22:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:23,335 INFO L225 Difference]: With dead ends: 695 [2020-07-17 12:22:23,335 INFO L226 Difference]: Without dead ends: 520 [2020-07-17 12:22:23,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5945 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=7393, Invalid=21337, Unknown=0, NotChecked=0, Total=28730 [2020-07-17 12:22:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-07-17 12:22:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 352. [2020-07-17 12:22:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-07-17 12:22:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 375 transitions. [2020-07-17 12:22:23,353 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 375 transitions. Word has length 427 [2020-07-17 12:22:23,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:23,353 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 375 transitions. [2020-07-17 12:22:23,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 128 states. [2020-07-17 12:22:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 375 transitions. [2020-07-17 12:22:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-07-17 12:22:23,356 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:23,357 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:23,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:22:23,557 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:23,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:23,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2037930614, now seen corresponding path program 62 times [2020-07-17 12:22:23,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:23,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136160841] [2020-07-17 12:22:23,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8530 backedges. 1888 proven. 3362 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2020-07-17 12:22:25,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136160841] [2020-07-17 12:22:25,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151081924] [2020-07-17 12:22:25,827 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:22:25,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:22:25,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:22:25,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 87 conjunts are in the unsatisfiable core [2020-07-17 12:22:25,994 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:22:26,012 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:22:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8530 backedges. 1888 proven. 3362 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2020-07-17 12:22:26,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:22:26,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 49 [2020-07-17 12:22:26,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212133767] [2020-07-17 12:22:26,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-17 12:22:26,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:26,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-17 12:22:26,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=1352, Unknown=0, NotChecked=0, Total=2352 [2020-07-17 12:22:26,213 INFO L87 Difference]: Start difference. First operand 352 states and 375 transitions. Second operand 49 states. [2020-07-17 12:22:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:27,040 INFO L93 Difference]: Finished difference Result 367 states and 391 transitions. [2020-07-17 12:22:27,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-17 12:22:27,042 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 429 [2020-07-17 12:22:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:27,044 INFO L225 Difference]: With dead ends: 367 [2020-07-17 12:22:27,044 INFO L226 Difference]: Without dead ends: 365 [2020-07-17 12:22:27,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1006, Invalid=1444, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 12:22:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-07-17 12:22:27,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 364. [2020-07-17 12:22:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-07-17 12:22:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 388 transitions. [2020-07-17 12:22:27,058 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 388 transitions. Word has length 429 [2020-07-17 12:22:27,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:27,059 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 388 transitions. [2020-07-17 12:22:27,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-17 12:22:27,059 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 388 transitions. [2020-07-17 12:22:27,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-07-17 12:22:27,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:27,061 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 43, 43, 43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:27,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-07-17 12:22:27,262 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:27,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:27,263 INFO L82 PathProgramCache]: Analyzing trace with hash -99716244, now seen corresponding path program 63 times [2020-07-17 12:22:27,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:27,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606292537] [2020-07-17 12:22:27,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9202 backedges. 3784 proven. 1806 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-07-17 12:22:33,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606292537] [2020-07-17 12:22:33,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567232708] [2020-07-17 12:22:33,418 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:22:33,637 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2020-07-17 12:22:33,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:22:33,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 89 conjunts are in the unsatisfiable core [2020-07-17 12:22:33,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:22:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9202 backedges. 3784 proven. 1806 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-07-17 12:22:41,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:22:41,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 133 [2020-07-17 12:22:41,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805469712] [2020-07-17 12:22:41,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2020-07-17 12:22:41,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:41,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2020-07-17 12:22:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4048, Invalid=13508, Unknown=0, NotChecked=0, Total=17556 [2020-07-17 12:22:41,895 INFO L87 Difference]: Start difference. First operand 364 states and 388 transitions. Second operand 133 states. [2020-07-17 12:22:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:47,893 INFO L93 Difference]: Finished difference Result 723 states and 876 transitions. [2020-07-17 12:22:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-07-17 12:22:47,895 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 445 [2020-07-17 12:22:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:47,897 INFO L225 Difference]: With dead ends: 723 [2020-07-17 12:22:47,897 INFO L226 Difference]: Without dead ends: 538 [2020-07-17 12:22:47,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6448 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=7875, Invalid=22925, Unknown=0, NotChecked=0, Total=30800 [2020-07-17 12:22:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2020-07-17 12:22:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 366. [2020-07-17 12:22:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-07-17 12:22:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 390 transitions. [2020-07-17 12:22:47,912 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 390 transitions. Word has length 445 [2020-07-17 12:22:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:47,913 INFO L479 AbstractCegarLoop]: Abstraction has 366 states and 390 transitions. [2020-07-17 12:22:47,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 133 states. [2020-07-17 12:22:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 390 transitions. [2020-07-17 12:22:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-17 12:22:47,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:47,915 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:48,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:22:48,117 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:48,117 INFO L82 PathProgramCache]: Analyzing trace with hash 592048017, now seen corresponding path program 64 times [2020-07-17 12:22:48,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:48,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85330751] [2020-07-17 12:22:48,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9288 backedges. 3784 proven. 1892 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-07-17 12:22:54,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85330751] [2020-07-17 12:22:54,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74022769] [2020-07-17 12:22:54,507 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:22:54,667 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:22:54,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:22:54,672 INFO L264 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 90 conjunts are in the unsatisfiable core [2020-07-17 12:22:54,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:22:57,544 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-17 12:23:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9288 backedges. 3784 proven. 1892 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-07-17 12:23:03,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:23:03,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 134 [2020-07-17 12:23:03,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46617642] [2020-07-17 12:23:03,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2020-07-17 12:23:03,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:03,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2020-07-17 12:23:03,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4093, Invalid=13729, Unknown=0, NotChecked=0, Total=17822 [2020-07-17 12:23:03,342 INFO L87 Difference]: Start difference. First operand 366 states and 390 transitions. Second operand 134 states. [2020-07-17 12:23:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:10,016 INFO L93 Difference]: Finished difference Result 727 states and 883 transitions. [2020-07-17 12:23:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-07-17 12:23:10,016 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 447 [2020-07-17 12:23:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:10,018 INFO L225 Difference]: With dead ends: 727 [2020-07-17 12:23:10,018 INFO L226 Difference]: Without dead ends: 544 [2020-07-17 12:23:10,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6536 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=8097, Invalid=23409, Unknown=0, NotChecked=0, Total=31506 [2020-07-17 12:23:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-07-17 12:23:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 368. [2020-07-17 12:23:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-07-17 12:23:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 392 transitions. [2020-07-17 12:23:10,039 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 392 transitions. Word has length 447 [2020-07-17 12:23:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:10,040 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 392 transitions. [2020-07-17 12:23:10,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 134 states. [2020-07-17 12:23:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 392 transitions. [2020-07-17 12:23:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-17 12:23:10,042 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:10,043 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:10,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-07-17 12:23:10,244 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:10,245 INFO L82 PathProgramCache]: Analyzing trace with hash -342428042, now seen corresponding path program 65 times [2020-07-17 12:23:10,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:10,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470125551] [2020-07-17 12:23:10,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9376 backedges. 2066 proven. 3698 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-07-17 12:23:12,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470125551] [2020-07-17 12:23:12,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089668581] [2020-07-17 12:23:12,722 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:23:12,959 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 45 check-sat command(s) [2020-07-17 12:23:12,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:23:12,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-17 12:23:12,971 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:23:12,990 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:23:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9376 backedges. 2066 proven. 3698 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-07-17 12:23:13,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:23:13,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 51 [2020-07-17 12:23:13,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603415415] [2020-07-17 12:23:13,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-17 12:23:13,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:13,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-17 12:23:13,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2020-07-17 12:23:13,216 INFO L87 Difference]: Start difference. First operand 368 states and 392 transitions. Second operand 51 states. [2020-07-17 12:23:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:14,337 INFO L93 Difference]: Finished difference Result 383 states and 408 transitions. [2020-07-17 12:23:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-17 12:23:14,339 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 449 [2020-07-17 12:23:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:14,342 INFO L225 Difference]: With dead ends: 383 [2020-07-17 12:23:14,342 INFO L226 Difference]: Without dead ends: 381 [2020-07-17 12:23:14,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1097, Invalid=1555, Unknown=0, NotChecked=0, Total=2652 [2020-07-17 12:23:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-07-17 12:23:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 380. [2020-07-17 12:23:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-07-17 12:23:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 405 transitions. [2020-07-17 12:23:14,356 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 405 transitions. Word has length 449 [2020-07-17 12:23:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:14,356 INFO L479 AbstractCegarLoop]: Abstraction has 380 states and 405 transitions. [2020-07-17 12:23:14,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-17 12:23:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 405 transitions. [2020-07-17 12:23:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-07-17 12:23:14,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:14,358 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 45, 45, 45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:14,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-07-17 12:23:14,559 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:14,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:14,560 INFO L82 PathProgramCache]: Analyzing trace with hash -753505192, now seen corresponding path program 66 times [2020-07-17 12:23:14,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:14,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284032351] [2020-07-17 12:23:14,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10080 backedges. 4140 proven. 1980 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2020-07-17 12:23:21,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284032351] [2020-07-17 12:23:21,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262450787] [2020-07-17 12:23:21,988 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:23:22,216 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2020-07-17 12:23:22,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:23:22,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 93 conjunts are in the unsatisfiable core [2020-07-17 12:23:22,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:23:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10080 backedges. 4140 proven. 1980 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2020-07-17 12:23:32,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:23:32,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 139 [2020-07-17 12:23:32,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940610937] [2020-07-17 12:23:32,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2020-07-17 12:23:32,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:32,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2020-07-17 12:23:32,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4416, Invalid=14766, Unknown=0, NotChecked=0, Total=19182 [2020-07-17 12:23:32,214 INFO L87 Difference]: Start difference. First operand 380 states and 405 transitions. Second operand 139 states. [2020-07-17 12:23:39,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:39,487 INFO L93 Difference]: Finished difference Result 755 states and 915 transitions. [2020-07-17 12:23:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-07-17 12:23:39,489 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 465 [2020-07-17 12:23:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:39,493 INFO L225 Difference]: With dead ends: 755 [2020-07-17 12:23:39,493 INFO L226 Difference]: Without dead ends: 562 [2020-07-17 12:23:39,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7063 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=8601, Invalid=25071, Unknown=0, NotChecked=0, Total=33672 [2020-07-17 12:23:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-07-17 12:23:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 382. [2020-07-17 12:23:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-07-17 12:23:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 407 transitions. [2020-07-17 12:23:39,510 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 407 transitions. Word has length 465 [2020-07-17 12:23:39,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:39,511 INFO L479 AbstractCegarLoop]: Abstraction has 382 states and 407 transitions. [2020-07-17 12:23:39,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 139 states. [2020-07-17 12:23:39,511 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 407 transitions. [2020-07-17 12:23:39,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-17 12:23:39,514 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:39,514 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:39,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-07-17 12:23:39,730 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:39,731 INFO L82 PathProgramCache]: Analyzing trace with hash -103324675, now seen corresponding path program 67 times [2020-07-17 12:23:39,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:39,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48379141] [2020-07-17 12:23:39,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10170 backedges. 4140 proven. 2070 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2020-07-17 12:23:47,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48379141] [2020-07-17 12:23:47,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469788553] [2020-07-17 12:23:47,782 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:23:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:47,962 INFO L264 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 94 conjunts are in the unsatisfiable core [2020-07-17 12:23:47,967 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:23:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10170 backedges. 4140 proven. 2070 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2020-07-17 12:23:58,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:23:58,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 140 [2020-07-17 12:23:58,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348250395] [2020-07-17 12:23:58,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2020-07-17 12:23:58,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:58,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2020-07-17 12:23:58,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4463, Invalid=14997, Unknown=0, NotChecked=0, Total=19460 [2020-07-17 12:23:58,647 INFO L87 Difference]: Start difference. First operand 382 states and 407 transitions. Second operand 140 states. [2020-07-17 12:24:06,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:24:06,883 INFO L93 Difference]: Finished difference Result 759 states and 922 transitions. [2020-07-17 12:24:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-07-17 12:24:06,883 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 467 [2020-07-17 12:24:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:24:06,885 INFO L225 Difference]: With dead ends: 759 [2020-07-17 12:24:06,885 INFO L226 Difference]: Without dead ends: 568 [2020-07-17 12:24:06,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7155 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=8833, Invalid=25577, Unknown=0, NotChecked=0, Total=34410 [2020-07-17 12:24:06,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-07-17 12:24:06,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 384. [2020-07-17 12:24:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-07-17 12:24:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 409 transitions. [2020-07-17 12:24:06,903 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 409 transitions. Word has length 467 [2020-07-17 12:24:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:24:06,903 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 409 transitions. [2020-07-17 12:24:06,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 140 states. [2020-07-17 12:24:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 409 transitions. [2020-07-17 12:24:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-17 12:24:06,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:24:06,907 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:24:07,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:24:07,108 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:24:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:24:07,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894242, now seen corresponding path program 68 times [2020-07-17 12:24:07,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:24:07,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634131413] [2020-07-17 12:24:07,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:24:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10262 backedges. 2252 proven. 4050 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2020-07-17 12:24:10,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634131413] [2020-07-17 12:24:10,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861507150] [2020-07-17 12:24:10,299 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:24:10,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:24:10,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:24:10,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-17 12:24:10,485 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:24:10,501 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:24:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10262 backedges. 2252 proven. 4050 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2020-07-17 12:24:10,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:24:10,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 53 [2020-07-17 12:24:10,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585846091] [2020-07-17 12:24:10,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-17 12:24:10,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:24:10,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-17 12:24:10,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=1570, Unknown=0, NotChecked=0, Total=2756 [2020-07-17 12:24:10,754 INFO L87 Difference]: Start difference. First operand 384 states and 409 transitions. Second operand 53 states. [2020-07-17 12:24:12,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:24:12,134 INFO L93 Difference]: Finished difference Result 399 states and 425 transitions. [2020-07-17 12:24:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-07-17 12:24:12,136 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 469 [2020-07-17 12:24:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:24:12,139 INFO L225 Difference]: With dead ends: 399 [2020-07-17 12:24:12,139 INFO L226 Difference]: Without dead ends: 397 [2020-07-17 12:24:12,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 605 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1192, Invalid=1670, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 12:24:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-07-17 12:24:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 396. [2020-07-17 12:24:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-07-17 12:24:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 422 transitions. [2020-07-17 12:24:12,154 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 422 transitions. Word has length 469 [2020-07-17 12:24:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:24:12,154 INFO L479 AbstractCegarLoop]: Abstraction has 396 states and 422 transitions. [2020-07-17 12:24:12,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-17 12:24:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 422 transitions. [2020-07-17 12:24:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-17 12:24:12,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:24:12,158 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 47, 47, 47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:24:12,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:24:12,365 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:24:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:24:12,366 INFO L82 PathProgramCache]: Analyzing trace with hash 676537412, now seen corresponding path program 69 times [2020-07-17 12:24:12,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:24:12,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202854372] [2020-07-17 12:24:12,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:24:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10998 backedges. 4512 proven. 2162 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2020-07-17 12:24:21,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202854372] [2020-07-17 12:24:21,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496075644] [2020-07-17 12:24:21,516 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:24:21,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2020-07-17 12:24:21,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:24:21,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-17 12:24:21,797 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:24:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10998 backedges. 4512 proven. 2162 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2020-07-17 12:24:34,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:24:34,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 145 [2020-07-17 12:24:34,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104789338] [2020-07-17 12:24:34,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2020-07-17 12:24:34,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:24:34,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2020-07-17 12:24:34,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4800, Invalid=16080, Unknown=0, NotChecked=0, Total=20880 [2020-07-17 12:24:34,018 INFO L87 Difference]: Start difference. First operand 396 states and 422 transitions. Second operand 145 states. [2020-07-17 12:24:43,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:24:43,347 INFO L93 Difference]: Finished difference Result 787 states and 954 transitions. [2020-07-17 12:24:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-07-17 12:24:43,349 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 485 [2020-07-17 12:24:43,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:24:43,352 INFO L225 Difference]: With dead ends: 787 [2020-07-17 12:24:43,352 INFO L226 Difference]: Without dead ends: 586 [2020-07-17 12:24:43,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7706 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=9359, Invalid=27313, Unknown=0, NotChecked=0, Total=36672 [2020-07-17 12:24:43,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-07-17 12:24:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 398. [2020-07-17 12:24:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-07-17 12:24:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 424 transitions. [2020-07-17 12:24:43,373 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 424 transitions. Word has length 485 [2020-07-17 12:24:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:24:43,373 INFO L479 AbstractCegarLoop]: Abstraction has 398 states and 424 transitions. [2020-07-17 12:24:43,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 145 states. [2020-07-17 12:24:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 424 transitions. [2020-07-17 12:24:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-17 12:24:43,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:24:43,392 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:24:43,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:24:43,598 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:24:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:24:43,599 INFO L82 PathProgramCache]: Analyzing trace with hash 579393385, now seen corresponding path program 70 times [2020-07-17 12:24:43,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:24:43,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510630821] [2020-07-17 12:24:43,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:24:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11092 backedges. 4512 proven. 2256 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2020-07-17 12:24:53,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510630821] [2020-07-17 12:24:53,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080103] [2020-07-17 12:24:53,375 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:24:53,555 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:24:53,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:24:53,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 98 conjunts are in the unsatisfiable core [2020-07-17 12:24:53,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:25:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11092 backedges. 4512 proven. 2256 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2020-07-17 12:25:07,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:25:07,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 146 [2020-07-17 12:25:07,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873352428] [2020-07-17 12:25:07,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2020-07-17 12:25:07,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:25:07,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2020-07-17 12:25:07,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4849, Invalid=16321, Unknown=0, NotChecked=0, Total=21170 [2020-07-17 12:25:07,082 INFO L87 Difference]: Start difference. First operand 398 states and 424 transitions. Second operand 146 states. [2020-07-17 12:25:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:25:17,138 INFO L93 Difference]: Finished difference Result 791 states and 961 transitions. [2020-07-17 12:25:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-07-17 12:25:17,138 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 487 [2020-07-17 12:25:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:25:17,140 INFO L225 Difference]: With dead ends: 791 [2020-07-17 12:25:17,140 INFO L226 Difference]: Without dead ends: 592 [2020-07-17 12:25:17,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=9601, Invalid=27841, Unknown=0, NotChecked=0, Total=37442 [2020-07-17 12:25:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2020-07-17 12:25:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 400. [2020-07-17 12:25:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-07-17 12:25:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 426 transitions. [2020-07-17 12:25:17,161 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 426 transitions. Word has length 487 [2020-07-17 12:25:17,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:25:17,161 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 426 transitions. [2020-07-17 12:25:17,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 146 states. [2020-07-17 12:25:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 426 transitions. [2020-07-17 12:25:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-17 12:25:17,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:25:17,163 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:25:17,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-07-17 12:25:17,364 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:25:17,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:25:17,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1713263950, now seen corresponding path program 71 times [2020-07-17 12:25:17,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:25:17,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354534492] [2020-07-17 12:25:17,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:25:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11188 backedges. 2446 proven. 4418 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2020-07-17 12:25:21,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354534492] [2020-07-17 12:25:21,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844972363] [2020-07-17 12:25:21,265 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:25:21,682 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2020-07-17 12:25:21,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:25:21,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 1322 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-17 12:25:21,704 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:25:21,753 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:25:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11188 backedges. 2446 proven. 4418 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2020-07-17 12:25:22,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:25:22,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 55 [2020-07-17 12:25:22,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886159733] [2020-07-17 12:25:22,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-17 12:25:22,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:25:22,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-17 12:25:22,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1285, Invalid=1685, Unknown=0, NotChecked=0, Total=2970 [2020-07-17 12:25:22,182 INFO L87 Difference]: Start difference. First operand 400 states and 426 transitions. Second operand 55 states. [2020-07-17 12:25:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:25:23,902 INFO L93 Difference]: Finished difference Result 415 states and 442 transitions. [2020-07-17 12:25:23,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-17 12:25:23,905 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 489 [2020-07-17 12:25:23,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:25:23,908 INFO L225 Difference]: With dead ends: 415 [2020-07-17 12:25:23,908 INFO L226 Difference]: Without dead ends: 413 [2020-07-17 12:25:23,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1291, Invalid=1789, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 12:25:23,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-07-17 12:25:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 412. [2020-07-17 12:25:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-07-17 12:25:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 439 transitions. [2020-07-17 12:25:23,925 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 439 transitions. Word has length 489 [2020-07-17 12:25:23,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:25:23,925 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 439 transitions. [2020-07-17 12:25:23,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-17 12:25:23,926 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 439 transitions. [2020-07-17 12:25:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-17 12:25:23,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:25:23,928 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 49, 49, 49, 49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:25:24,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:25:24,129 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:25:24,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:25:24,130 INFO L82 PathProgramCache]: Analyzing trace with hash -831186128, now seen corresponding path program 72 times [2020-07-17 12:25:24,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:25:24,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323885303] [2020-07-17 12:25:24,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:25:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11956 backedges. 4900 proven. 2352 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-07-17 12:25:35,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323885303] [2020-07-17 12:25:35,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735342104] [2020-07-17 12:25:35,255 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:25:35,544 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2020-07-17 12:25:35,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:25:35,551 INFO L264 TraceCheckSpWp]: Trace formula consists of 1356 conjuncts, 101 conjunts are in the unsatisfiable core [2020-07-17 12:25:35,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:25:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11956 backedges. 4900 proven. 2352 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-07-17 12:25:50,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:25:50,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 151 [2020-07-17 12:25:50,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84150825] [2020-07-17 12:25:50,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2020-07-17 12:25:50,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:25:50,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2020-07-17 12:25:50,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5200, Invalid=17450, Unknown=0, NotChecked=0, Total=22650 [2020-07-17 12:25:50,910 INFO L87 Difference]: Start difference. First operand 412 states and 439 transitions. Second operand 151 states. [2020-07-17 12:26:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:02,106 INFO L93 Difference]: Finished difference Result 819 states and 993 transitions. [2020-07-17 12:26:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-07-17 12:26:02,109 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 505 [2020-07-17 12:26:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:02,113 INFO L225 Difference]: With dead ends: 819 [2020-07-17 12:26:02,113 INFO L226 Difference]: Without dead ends: 610 [2020-07-17 12:26:02,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8377 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=10149, Invalid=29651, Unknown=0, NotChecked=0, Total=39800 [2020-07-17 12:26:02,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-07-17 12:26:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 414. [2020-07-17 12:26:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-07-17 12:26:02,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 441 transitions. [2020-07-17 12:26:02,132 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 441 transitions. Word has length 505 [2020-07-17 12:26:02,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:02,132 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 441 transitions. [2020-07-17 12:26:02,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 151 states. [2020-07-17 12:26:02,132 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 441 transitions. [2020-07-17 12:26:02,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-17 12:26:02,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:02,135 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:26:02,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:26:02,336 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:02,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:02,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1643039189, now seen corresponding path program 73 times [2020-07-17 12:26:02,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:02,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396197497] [2020-07-17 12:26:02,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12054 backedges. 4900 proven. 2450 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-07-17 12:26:14,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396197497] [2020-07-17 12:26:14,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726762161] [2020-07-17 12:26:14,006 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:26:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:14,192 INFO L264 TraceCheckSpWp]: Trace formula consists of 1366 conjuncts, 102 conjunts are in the unsatisfiable core [2020-07-17 12:26:14,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:26:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12054 backedges. 4900 proven. 2450 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-07-17 12:26:30,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:26:30,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 152 [2020-07-17 12:26:30,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270829489] [2020-07-17 12:26:30,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2020-07-17 12:26:30,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:30,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2020-07-17 12:26:30,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5251, Invalid=17701, Unknown=0, NotChecked=0, Total=22952 [2020-07-17 12:26:30,337 INFO L87 Difference]: Start difference. First operand 414 states and 441 transitions. Second operand 152 states. [2020-07-17 12:26:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:42,619 INFO L93 Difference]: Finished difference Result 823 states and 1000 transitions. [2020-07-17 12:26:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-07-17 12:26:42,619 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 507 [2020-07-17 12:26:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:42,622 INFO L225 Difference]: With dead ends: 823 [2020-07-17 12:26:42,622 INFO L226 Difference]: Without dead ends: 616 [2020-07-17 12:26:42,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8477 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=10401, Invalid=30201, Unknown=0, NotChecked=0, Total=40602 [2020-07-17 12:26:42,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2020-07-17 12:26:42,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 416. [2020-07-17 12:26:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-07-17 12:26:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 443 transitions. [2020-07-17 12:26:42,652 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 443 transitions. Word has length 507 [2020-07-17 12:26:42,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:42,652 INFO L479 AbstractCegarLoop]: Abstraction has 416 states and 443 transitions. [2020-07-17 12:26:42,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 152 states. [2020-07-17 12:26:42,652 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 443 transitions. [2020-07-17 12:26:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-17 12:26:42,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:42,656 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:26:42,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:26:42,857 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:42,857 INFO L82 PathProgramCache]: Analyzing trace with hash -38313158, now seen corresponding path program 74 times [2020-07-17 12:26:42,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:42,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737757000] [2020-07-17 12:26:42,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12154 backedges. 2648 proven. 4802 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-07-17 12:26:47,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737757000] [2020-07-17 12:26:47,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671564884] [2020-07-17 12:26:47,580 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:26:47,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:26:47,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:26:47,780 INFO L264 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 103 conjunts are in the unsatisfiable core [2020-07-17 12:26:47,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:26:47,812 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:26:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12154 backedges. 2648 proven. 4802 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-07-17 12:26:48,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:26:48,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 57 [2020-07-17 12:26:48,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990482338] [2020-07-17 12:26:48,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-17 12:26:48,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:48,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-17 12:26:48,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1388, Invalid=1804, Unknown=0, NotChecked=0, Total=3192 [2020-07-17 12:26:48,146 INFO L87 Difference]: Start difference. First operand 416 states and 443 transitions. Second operand 57 states. [2020-07-17 12:26:50,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:50,220 INFO L93 Difference]: Finished difference Result 431 states and 459 transitions. [2020-07-17 12:26:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-07-17 12:26:50,224 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 509 [2020-07-17 12:26:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:50,227 INFO L225 Difference]: With dead ends: 431 [2020-07-17 12:26:50,227 INFO L226 Difference]: Without dead ends: 429 [2020-07-17 12:26:50,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 657 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1394, Invalid=1912, Unknown=0, NotChecked=0, Total=3306 [2020-07-17 12:26:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-07-17 12:26:50,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 428. [2020-07-17 12:26:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-07-17 12:26:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 456 transitions. [2020-07-17 12:26:50,244 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 456 transitions. Word has length 509 [2020-07-17 12:26:50,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:50,244 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 456 transitions. [2020-07-17 12:26:50,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-17 12:26:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 456 transitions. [2020-07-17 12:26:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2020-07-17 12:26:50,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:50,247 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 51, 51, 51, 51, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:26:50,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-07-17 12:26:50,448 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:50,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:50,448 INFO L82 PathProgramCache]: Analyzing trace with hash 283955484, now seen corresponding path program 75 times [2020-07-17 12:26:50,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:50,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613662428] [2020-07-17 12:26:50,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12954 backedges. 5304 proven. 2550 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2020-07-17 12:27:03,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613662428] [2020-07-17 12:27:03,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922653838] [2020-07-17 12:27:03,849 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:27:04,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-07-17 12:27:04,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:27:04,136 INFO L264 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 105 conjunts are in the unsatisfiable core [2020-07-17 12:27:04,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:27:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12954 backedges. 5304 proven. 2550 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2020-07-17 12:27:22,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:27:22,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 157 [2020-07-17 12:27:22,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925634997] [2020-07-17 12:27:22,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 157 states [2020-07-17 12:27:22,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:27:22,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2020-07-17 12:27:22,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5616, Invalid=18876, Unknown=0, NotChecked=0, Total=24492 [2020-07-17 12:27:22,935 INFO L87 Difference]: Start difference. First operand 428 states and 456 transitions. Second operand 157 states. [2020-07-17 12:27:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:27:36,516 INFO L93 Difference]: Finished difference Result 851 states and 1032 transitions. [2020-07-17 12:27:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-07-17 12:27:36,520 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 525 [2020-07-17 12:27:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:27:36,524 INFO L225 Difference]: With dead ends: 851 [2020-07-17 12:27:36,524 INFO L226 Difference]: Without dead ends: 634 [2020-07-17 12:27:36,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9076 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=10971, Invalid=32085, Unknown=0, NotChecked=0, Total=43056 [2020-07-17 12:27:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-07-17 12:27:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 430. [2020-07-17 12:27:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-07-17 12:27:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 458 transitions. [2020-07-17 12:27:36,555 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 458 transitions. Word has length 525 [2020-07-17 12:27:36,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:27:36,555 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 458 transitions. [2020-07-17 12:27:36,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 157 states. [2020-07-17 12:27:36,555 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 458 transitions. [2020-07-17 12:27:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2020-07-17 12:27:36,559 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:27:36,559 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:27:36,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:27:36,774 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:27:36,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:27:36,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1129954113, now seen corresponding path program 76 times [2020-07-17 12:27:36,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:27:36,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429736212] [2020-07-17 12:27:36,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:27:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13056 backedges. 5304 proven. 2652 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2020-07-17 12:27:51,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429736212] [2020-07-17 12:27:51,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95313432] [2020-07-17 12:27:51,005 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:27:51,202 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:27:51,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:27:51,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 106 conjunts are in the unsatisfiable core [2020-07-17 12:27:51,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:28:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13056 backedges. 5304 proven. 2652 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2020-07-17 12:28:10,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:28:10,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 158 [2020-07-17 12:28:10,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454900445] [2020-07-17 12:28:10,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2020-07-17 12:28:10,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:28:10,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2020-07-17 12:28:10,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5669, Invalid=19137, Unknown=0, NotChecked=0, Total=24806 [2020-07-17 12:28:10,906 INFO L87 Difference]: Start difference. First operand 430 states and 458 transitions. Second operand 158 states. [2020-07-17 12:28:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:28:25,681 INFO L93 Difference]: Finished difference Result 855 states and 1039 transitions. [2020-07-17 12:28:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-07-17 12:28:25,681 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 527 [2020-07-17 12:28:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:28:25,684 INFO L225 Difference]: With dead ends: 855 [2020-07-17 12:28:25,684 INFO L226 Difference]: Without dead ends: 640 [2020-07-17 12:28:25,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9180 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=11233, Invalid=32657, Unknown=0, NotChecked=0, Total=43890 [2020-07-17 12:28:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-07-17 12:28:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 432. [2020-07-17 12:28:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-07-17 12:28:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 460 transitions. [2020-07-17 12:28:25,715 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 460 transitions. Word has length 527 [2020-07-17 12:28:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:28:25,716 INFO L479 AbstractCegarLoop]: Abstraction has 432 states and 460 transitions. [2020-07-17 12:28:25,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 158 states. [2020-07-17 12:28:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 460 transitions. [2020-07-17 12:28:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2020-07-17 12:28:25,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:28:25,720 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:28:25,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:28:25,935 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:28:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:28:25,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1909149658, now seen corresponding path program 77 times [2020-07-17 12:28:25,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:28:25,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538004677] [2020-07-17 12:28:25,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:28:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13160 backedges. 2858 proven. 5202 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2020-07-17 12:28:31,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538004677] [2020-07-17 12:28:31,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419531883] [2020-07-17 12:28:31,869 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:28:32,153 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 53 check-sat command(s) [2020-07-17 12:28:32,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:28:32,160 INFO L264 TraceCheckSpWp]: Trace formula consists of 1430 conjuncts, 107 conjunts are in the unsatisfiable core [2020-07-17 12:28:32,164 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:28:32,191 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:28:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13160 backedges. 2858 proven. 5202 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2020-07-17 12:28:32,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:28:32,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 59 [2020-07-17 12:28:32,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713195036] [2020-07-17 12:28:32,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-17 12:28:32,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:28:32,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-17 12:28:32,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1495, Invalid=1927, Unknown=0, NotChecked=0, Total=3422 [2020-07-17 12:28:32,596 INFO L87 Difference]: Start difference. First operand 432 states and 460 transitions. Second operand 59 states. [2020-07-17 12:28:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:28:34,651 INFO L93 Difference]: Finished difference Result 447 states and 476 transitions. [2020-07-17 12:28:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-07-17 12:28:34,655 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 529 [2020-07-17 12:28:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:28:34,658 INFO L225 Difference]: With dead ends: 447 [2020-07-17 12:28:34,658 INFO L226 Difference]: Without dead ends: 445 [2020-07-17 12:28:34,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1501, Invalid=2039, Unknown=0, NotChecked=0, Total=3540 [2020-07-17 12:28:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-07-17 12:28:34,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 444. [2020-07-17 12:28:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-07-17 12:28:34,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 473 transitions. [2020-07-17 12:28:34,680 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 473 transitions. Word has length 529 [2020-07-17 12:28:34,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:28:34,680 INFO L479 AbstractCegarLoop]: Abstraction has 444 states and 473 transitions. [2020-07-17 12:28:34,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-17 12:28:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 473 transitions. [2020-07-17 12:28:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2020-07-17 12:28:34,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:28:34,683 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 53, 53, 53, 53, 53, 53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:28:34,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-07-17 12:28:34,884 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:28:34,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:28:34,885 INFO L82 PathProgramCache]: Analyzing trace with hash -773143032, now seen corresponding path program 78 times [2020-07-17 12:28:34,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:28:34,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583834388] [2020-07-17 12:28:34,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:28:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13992 backedges. 5724 proven. 2756 refuted. 0 times theorem prover too weak. 5512 trivial. 0 not checked. [2020-07-17 12:28:50,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583834388] [2020-07-17 12:28:50,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901158230] [2020-07-17 12:28:50,733 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:28:51,016 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 54 check-sat command(s) [2020-07-17 12:28:51,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:28:51,023 INFO L264 TraceCheckSpWp]: Trace formula consists of 1464 conjuncts, 109 conjunts are in the unsatisfiable core [2020-07-17 12:28:51,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:29:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13992 backedges. 5724 proven. 2756 refuted. 0 times theorem prover too weak. 5512 trivial. 0 not checked. [2020-07-17 12:29:14,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:29:14,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 163 [2020-07-17 12:29:14,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258051165] [2020-07-17 12:29:14,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 163 states [2020-07-17 12:29:14,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:29:14,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2020-07-17 12:29:14,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6048, Invalid=20358, Unknown=0, NotChecked=0, Total=26406 [2020-07-17 12:29:14,016 INFO L87 Difference]: Start difference. First operand 444 states and 473 transitions. Second operand 163 states. [2020-07-17 12:29:30,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:29:30,582 INFO L93 Difference]: Finished difference Result 883 states and 1071 transitions. [2020-07-17 12:29:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-07-17 12:29:30,586 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 545 [2020-07-17 12:29:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:29:30,590 INFO L225 Difference]: With dead ends: 883 [2020-07-17 12:29:30,590 INFO L226 Difference]: Without dead ends: 658 [2020-07-17 12:29:30,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9803 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=11825, Invalid=34615, Unknown=0, NotChecked=0, Total=46440 [2020-07-17 12:29:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-07-17 12:29:30,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 446. [2020-07-17 12:29:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2020-07-17 12:29:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 475 transitions. [2020-07-17 12:29:30,613 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 475 transitions. Word has length 545 [2020-07-17 12:29:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:29:30,614 INFO L479 AbstractCegarLoop]: Abstraction has 446 states and 475 transitions. [2020-07-17 12:29:30,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 163 states. [2020-07-17 12:29:30,614 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 475 transitions. [2020-07-17 12:29:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2020-07-17 12:29:30,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:29:30,617 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:29:30,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:29:30,817 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:29:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:29:30,818 INFO L82 PathProgramCache]: Analyzing trace with hash 953822125, now seen corresponding path program 79 times [2020-07-17 12:29:30,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:29:30,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225441502] [2020-07-17 12:29:30,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:29:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat