/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-programs/partial_mod_count_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:10:30,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:10:30,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:10:30,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:10:30,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:10:30,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:10:30,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:10:30,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:10:30,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:10:30,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:10:30,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:10:30,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-21 22:10:30,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:10:30,750 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:10:30,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:10:30,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:10:30,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:10:30,756 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:10:30,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:10:30,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:10:30,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:10:30,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:10:30,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:10:30,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:10:30,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:10:30,759 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:10:30,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:10:30,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:10:30,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:10:30,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:10:30,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:10:30,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:10:30,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:10:30,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:10:30,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:10:30,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:10:30,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:10:30,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:10:30,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:10:31,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:10:31,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:10:31,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:10:31,291 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:10:31,292 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:10:31,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_2.c [2020-12-21 22:10:31,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b044af057/214325cf5232405687199049689b15dd/FLAG1de9b5ada [2020-12-21 22:10:32,074 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:10:32,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_2.c [2020-12-21 22:10:32,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b044af057/214325cf5232405687199049689b15dd/FLAG1de9b5ada [2020-12-21 22:10:32,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b044af057/214325cf5232405687199049689b15dd [2020-12-21 22:10:32,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:10:32,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:10:32,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:32,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:10:32,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:10:32,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442469b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32, skipping insertion in model container [2020-12-21 22:10:32,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:10:32,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:10:32,656 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_2.c[323,336] [2020-12-21 22:10:32,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:32,691 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:10:32,707 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_2.c[323,336] [2020-12-21 22:10:32,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:32,734 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:10:32,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32 WrapperNode [2020-12-21 22:10:32,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:32,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:32,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:10:32,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:10:32,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:32,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:10:32,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:10:32,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:10:32,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:10:32,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:10:32,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:10:32,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:10:32,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (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 [2020-12-21 22:10:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:10:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:10:32,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:10:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:10:32,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:10:32,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:10:32,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:10:33,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:10:33,261 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 22:10:33,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:33 BoogieIcfgContainer [2020-12-21 22:10:33,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:10:33,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:10:33,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:10:33,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:10:33,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:10:32" (1/3) ... [2020-12-21 22:10:33,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48960894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:33, skipping insertion in model container [2020-12-21 22:10:33,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (2/3) ... [2020-12-21 22:10:33,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48960894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:33, skipping insertion in model container [2020-12-21 22:10:33,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:33" (3/3) ... [2020-12-21 22:10:33,315 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_2.c [2020-12-21 22:10:33,323 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:10:33,329 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:10:33,354 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:10:33,407 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:10:33,407 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:10:33,408 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:10:33,408 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:10:33,408 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:10:33,408 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:10:33,408 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:10:33,409 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:10:33,427 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-21 22:10:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:10:33,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:33,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:33,435 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:33,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:33,443 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2020-12-21 22:10:33,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:33,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970945085] [2020-12-21 22:10:33,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:33,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970945085] [2020-12-21 22:10:33,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:33,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:10:33,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240609505] [2020-12-21 22:10:33,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:10:33,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:33,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:10:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:10:33,743 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-21 22:10:33,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:33,767 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2020-12-21 22:10:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:10:33,769 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 22:10:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:33,788 INFO L225 Difference]: With dead ends: 29 [2020-12-21 22:10:33,788 INFO L226 Difference]: Without dead ends: 13 [2020-12-21 22:10:33,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:10:33,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-21 22:10:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-21 22:10:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-21 22:10:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-21 22:10:33,831 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2020-12-21 22:10:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:33,831 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-21 22:10:33,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:10:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-21 22:10:33,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:10:33,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:33,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:33,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:10:33,833 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:33,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:33,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2020-12-21 22:10:33,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:33,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451998537] [2020-12-21 22:10:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:33,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451998537] [2020-12-21 22:10:33,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:33,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:10:33,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17753562] [2020-12-21 22:10:33,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:10:33,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:33,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:10:33,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:10:33,927 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2020-12-21 22:10:33,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:33,995 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-12-21 22:10:33,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:10:33,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-21 22:10:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:33,997 INFO L225 Difference]: With dead ends: 34 [2020-12-21 22:10:33,997 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:10:33,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:10:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:10:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2020-12-21 22:10:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 22:10:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-21 22:10:34,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-21 22:10:34,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:34,005 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-21 22:10:34,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:10:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-21 22:10:34,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 22:10:34,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:34,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:34,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:10:34,007 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:34,008 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2020-12-21 22:10:34,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:34,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944568271] [2020-12-21 22:10:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:34,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944568271] [2020-12-21 22:10:34,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412763711] [2020-12-21 22:10:34,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:34,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:10:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:34,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:34,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:10:34,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92617749] [2020-12-21 22:10:34,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:10:34,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:34,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:10:34,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:10:34,276 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2020-12-21 22:10:34,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:34,352 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-12-21 22:10:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:10:34,353 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-21 22:10:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:34,355 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:10:34,355 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:10:34,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:10:34,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:10:34,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2020-12-21 22:10:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:10:34,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-21 22:10:34,362 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-12-21 22:10:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:34,362 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-21 22:10:34,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:10:34,363 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-21 22:10:34,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:10:34,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:34,364 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:34,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 22:10:34,579 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2020-12-21 22:10:34,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:34,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480564789] [2020-12-21 22:10:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:34,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480564789] [2020-12-21 22:10:34,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240904477] [2020-12-21 22:10:34,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:34,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:10:34,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:10:34,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:34,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:10:34,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:10:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:10:34,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:34,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-21 22:10:34,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340729501] [2020-12-21 22:10:34,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:10:34,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:34,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:10:34,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:34,854 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2020-12-21 22:10:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:34,968 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-21 22:10:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:10:34,968 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-21 22:10:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:34,969 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:10:34,969 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:10:34,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:10:34,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:10:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-21 22:10:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 22:10:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-21 22:10:34,978 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2020-12-21 22:10:34,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:34,978 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-21 22:10:34,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:10:34,979 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-21 22:10:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 22:10:34,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:34,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:35,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:35,193 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:35,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:35,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2020-12-21 22:10:35,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:35,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116817630] [2020-12-21 22:10:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:35,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116817630] [2020-12-21 22:10:35,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118078787] [2020-12-21 22:10:35,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:35,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:10:35,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:35,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:35,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 22:10:35,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765131171] [2020-12-21 22:10:35,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:10:35,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:35,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:10:35,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:35,413 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-12-21 22:10:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:35,503 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-12-21 22:10:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:10:35,504 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-21 22:10:35,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:35,505 INFO L225 Difference]: With dead ends: 93 [2020-12-21 22:10:35,506 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 22:10:35,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 22:10:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2020-12-21 22:10:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 22:10:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-21 22:10:35,515 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2020-12-21 22:10:35,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:35,515 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-21 22:10:35,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:10:35,516 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-21 22:10:35,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:10:35,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:35,517 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:35,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:35,731 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:35,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2020-12-21 22:10:35,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:35,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407966603] [2020-12-21 22:10:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:35,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407966603] [2020-12-21 22:10:35,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845507423] [2020-12-21 22:10:35,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:35,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:35,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:35,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:10:35,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:36,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:36,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-21 22:10:36,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014813026] [2020-12-21 22:10:36,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:10:36,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:36,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:10:36,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:36,037 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2020-12-21 22:10:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:36,166 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2020-12-21 22:10:36,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:10:36,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-21 22:10:36,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:36,173 INFO L225 Difference]: With dead ends: 113 [2020-12-21 22:10:36,173 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 22:10:36,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 22:10:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2020-12-21 22:10:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:10:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-21 22:10:36,196 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-12-21 22:10:36,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:36,198 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-21 22:10:36,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:10:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-21 22:10:36,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:10:36,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:36,200 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:36,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:36,417 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:36,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:36,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2020-12-21 22:10:36,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:36,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190577072] [2020-12-21 22:10:36,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:36,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190577072] [2020-12-21 22:10:36,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500331309] [2020-12-21 22:10:36,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:36,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:10:36,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:36,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:10:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-21 22:10:36,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:36,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-12-21 22:10:36,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868871860] [2020-12-21 22:10:36,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:10:36,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:36,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:10:36,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:36,705 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-12-21 22:10:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:36,763 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-12-21 22:10:36,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:10:36,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-21 22:10:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:36,764 INFO L225 Difference]: With dead ends: 79 [2020-12-21 22:10:36,764 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 22:10:36,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 22:10:36,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2020-12-21 22:10:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:10:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-21 22:10:36,772 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2020-12-21 22:10:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:36,772 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-21 22:10:36,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:10:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-21 22:10:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:10:36,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:36,774 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:36,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 22:10:36,988 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:36,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:36,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2020-12-21 22:10:36,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:36,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090369656] [2020-12-21 22:10:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:37,010 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:37,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753424944] [2020-12-21 22:10:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:37,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:10:37,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:37,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090369656] [2020-12-21 22:10:37,220 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:37,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753424944] [2020-12-21 22:10:37,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:37,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:10:37,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797074614] [2020-12-21 22:10:37,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:10:37,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:10:37,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:37,222 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-12-21 22:10:37,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:37,353 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2020-12-21 22:10:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:10:37,354 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-21 22:10:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:37,356 INFO L225 Difference]: With dead ends: 157 [2020-12-21 22:10:37,356 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 22:10:37,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:37,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 22:10:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2020-12-21 22:10:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 22:10:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-12-21 22:10:37,367 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-12-21 22:10:37,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:37,368 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-12-21 22:10:37,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:10:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-12-21 22:10:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:10:37,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:37,369 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:37,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:37,584 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:37,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:37,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2020-12-21 22:10:37,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:37,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112419284] [2020-12-21 22:10:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:37,604 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:37,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776697822] [2020-12-21 22:10:37,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:37,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:37,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:37,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:10:37,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:37,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112419284] [2020-12-21 22:10:37,861 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:37,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776697822] [2020-12-21 22:10:37,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:37,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:10:37,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937850321] [2020-12-21 22:10:37,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:10:37,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:37,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:10:37,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:37,871 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2020-12-21 22:10:38,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:38,036 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2020-12-21 22:10:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:10:38,036 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-21 22:10:38,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:38,038 INFO L225 Difference]: With dead ends: 197 [2020-12-21 22:10:38,038 INFO L226 Difference]: Without dead ends: 174 [2020-12-21 22:10:38,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-21 22:10:38,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2020-12-21 22:10:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:10:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-12-21 22:10:38,067 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2020-12-21 22:10:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:38,067 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-12-21 22:10:38,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:10:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-12-21 22:10:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:10:38,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:38,070 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:38,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:38,284 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2020-12-21 22:10:38,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:38,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123446631] [2020-12-21 22:10:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:38,316 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:38,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959235277] [2020-12-21 22:10:38,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:38,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:10:38,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:38,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:10:38,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 22:10:38,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123446631] [2020-12-21 22:10:38,492 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:38,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959235277] [2020-12-21 22:10:38,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:38,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:10:38,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254039991] [2020-12-21 22:10:38,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:10:38,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:38,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:10:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:10:38,495 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-12-21 22:10:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:38,606 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-12-21 22:10:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:10:38,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-21 22:10:38,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:38,608 INFO L225 Difference]: With dead ends: 60 [2020-12-21 22:10:38,608 INFO L226 Difference]: Without dead ends: 58 [2020-12-21 22:10:38,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-21 22:10:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-12-21 22:10:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 22:10:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-12-21 22:10:38,626 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2020-12-21 22:10:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:38,629 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-12-21 22:10:38,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:10:38,629 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-12-21 22:10:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:10:38,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:38,633 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:38,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:10:38,835 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:38,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:38,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2020-12-21 22:10:38,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:38,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975218870] [2020-12-21 22:10:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:38,853 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:38,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706403773] [2020-12-21 22:10:38,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:38,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:10:38,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:38,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:10:38,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:10:39,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975218870] [2020-12-21 22:10:39,172 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:39,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706403773] [2020-12-21 22:10:39,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:39,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:10:39,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591570859] [2020-12-21 22:10:39,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:10:39,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:39,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:10:39,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:10:39,174 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2020-12-21 22:10:39,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:39,467 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2020-12-21 22:10:39,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:10:39,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-21 22:10:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:39,469 INFO L225 Difference]: With dead ends: 211 [2020-12-21 22:10:39,469 INFO L226 Difference]: Without dead ends: 188 [2020-12-21 22:10:39,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:10:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-21 22:10:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2020-12-21 22:10:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 22:10:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-12-21 22:10:39,479 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2020-12-21 22:10:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:39,479 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-12-21 22:10:39,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:10:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-12-21 22:10:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:10:39,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:39,480 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:39,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:39,698 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:39,699 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2020-12-21 22:10:39,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:39,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283321491] [2020-12-21 22:10:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:39,740 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:39,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661139571] [2020-12-21 22:10:39,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:40,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 22:10:40,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:10:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:10:40,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283321491] [2020-12-21 22:10:40,272 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:40,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661139571] [2020-12-21 22:10:40,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:40,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:10:40,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088915922] [2020-12-21 22:10:40,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:10:40,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:40,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:10:40,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:10:40,275 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2020-12-21 22:10:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:40,476 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2020-12-21 22:10:40,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:10:40,477 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-21 22:10:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:40,479 INFO L225 Difference]: With dead ends: 314 [2020-12-21 22:10:40,479 INFO L226 Difference]: Without dead ends: 283 [2020-12-21 22:10:40,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:10:40,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-21 22:10:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2020-12-21 22:10:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 22:10:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-21 22:10:40,491 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2020-12-21 22:10:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:40,491 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-21 22:10:40,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:10:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-21 22:10:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 22:10:40,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:40,492 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:40,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:40,702 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:40,703 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2020-12-21 22:10:40,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:40,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083602413] [2020-12-21 22:10:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:40,723 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:40,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011899825] [2020-12-21 22:10:40,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:40,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:10:40,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:40,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:10:40,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 22:10:41,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083602413] [2020-12-21 22:10:41,029 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:41,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011899825] [2020-12-21 22:10:41,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:41,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:10:41,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958296528] [2020-12-21 22:10:41,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:10:41,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:41,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:10:41,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:41,031 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2020-12-21 22:10:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:41,137 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-12-21 22:10:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:10:41,138 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-21 22:10:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:41,139 INFO L225 Difference]: With dead ends: 77 [2020-12-21 22:10:41,139 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:10:41,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:10:41,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:10:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-21 22:10:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 22:10:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-12-21 22:10:41,148 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2020-12-21 22:10:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:41,148 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-12-21 22:10:41,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:10:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-12-21 22:10:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 22:10:41,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:41,150 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:41,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:10:41,354 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:41,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:41,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2020-12-21 22:10:41,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:41,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543757006] [2020-12-21 22:10:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:41,374 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:41,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097323563] [2020-12-21 22:10:41,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:10:41,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:10:41,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543757006] [2020-12-21 22:10:41,769 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:41,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097323563] [2020-12-21 22:10:41,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:41,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:10:41,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264428170] [2020-12-21 22:10:41,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:10:41,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:41,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:10:41,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:10:41,772 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2020-12-21 22:10:42,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:42,037 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2020-12-21 22:10:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:10:42,038 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-12-21 22:10:42,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:42,041 INFO L225 Difference]: With dead ends: 450 [2020-12-21 22:10:42,041 INFO L226 Difference]: Without dead ends: 414 [2020-12-21 22:10:42,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:10:42,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-21 22:10:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2020-12-21 22:10:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 22:10:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-12-21 22:10:42,064 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2020-12-21 22:10:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:42,066 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-12-21 22:10:42,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:10:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-12-21 22:10:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 22:10:42,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:42,072 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:42,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:10:42,287 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:42,287 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2020-12-21 22:10:42,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:42,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175924280] [2020-12-21 22:10:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:42,324 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:42,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473891773] [2020-12-21 22:10:42,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:42,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:42,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:42,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:10:42,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:10:42,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175924280] [2020-12-21 22:10:42,815 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:42,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473891773] [2020-12-21 22:10:42,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:42,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-21 22:10:42,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636469587] [2020-12-21 22:10:42,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:10:42,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:10:42,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:10:42,818 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2020-12-21 22:10:43,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:43,141 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2020-12-21 22:10:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:10:43,142 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-12-21 22:10:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:43,145 INFO L225 Difference]: With dead ends: 540 [2020-12-21 22:10:43,145 INFO L226 Difference]: Without dead ends: 504 [2020-12-21 22:10:43,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:10:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-12-21 22:10:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2020-12-21 22:10:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 22:10:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-12-21 22:10:43,160 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2020-12-21 22:10:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:43,160 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-12-21 22:10:43,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:10:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-12-21 22:10:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 22:10:43,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:43,161 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:43,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:10:43,376 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:43,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:43,377 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2020-12-21 22:10:43,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:43,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033337485] [2020-12-21 22:10:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:43,409 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:43,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846816680] [2020-12-21 22:10:43,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:43,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:10:43,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:43,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:10:43,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-21 22:10:43,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033337485] [2020-12-21 22:10:43,846 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:43,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846816680] [2020-12-21 22:10:43,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:43,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:10:43,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934608389] [2020-12-21 22:10:43,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:10:43,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:10:43,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:43,848 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2020-12-21 22:10:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:44,002 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-12-21 22:10:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:10:44,002 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-12-21 22:10:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:44,003 INFO L225 Difference]: With dead ends: 100 [2020-12-21 22:10:44,004 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 22:10:44,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:10:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 22:10:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-12-21 22:10:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-21 22:10:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-12-21 22:10:44,013 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2020-12-21 22:10:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:44,014 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-12-21 22:10:44,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:10:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-12-21 22:10:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 22:10:44,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:44,015 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:44,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:44,219 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:44,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2020-12-21 22:10:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:44,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975608286] [2020-12-21 22:10:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:44,241 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:44,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456426557] [2020-12-21 22:10:44,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:44,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:10:44,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:44,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:10:44,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 508 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:10:44,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975608286] [2020-12-21 22:10:44,752 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:44,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456426557] [2020-12-21 22:10:44,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:44,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:10:44,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894002686] [2020-12-21 22:10:44,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 22:10:44,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:44,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 22:10:44,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-12-21 22:10:44,755 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2020-12-21 22:10:45,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:45,478 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2020-12-21 22:10:45,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 22:10:45,479 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-12-21 22:10:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:45,483 INFO L225 Difference]: With dead ends: 580 [2020-12-21 22:10:45,483 INFO L226 Difference]: Without dead ends: 547 [2020-12-21 22:10:45,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:10:45,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-12-21 22:10:45,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2020-12-21 22:10:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:10:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-12-21 22:10:45,499 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2020-12-21 22:10:45,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:45,500 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-12-21 22:10:45,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 22:10:45,500 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-12-21 22:10:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 22:10:45,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:45,501 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:45,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:10:45,716 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:45,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:45,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2020-12-21 22:10:45,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:45,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645814821] [2020-12-21 22:10:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:45,739 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:45,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96651406] [2020-12-21 22:10:45,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:46,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-21 22:10:46,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:46,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:10:46,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:10:46,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645814821] [2020-12-21 22:10:46,986 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:46,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96651406] [2020-12-21 22:10:46,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:46,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:10:46,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751040025] [2020-12-21 22:10:46,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 22:10:46,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:46,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 22:10:46,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:10:46,988 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2020-12-21 22:10:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:47,414 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2020-12-21 22:10:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:10:47,415 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-12-21 22:10:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:47,419 INFO L225 Difference]: With dead ends: 757 [2020-12-21 22:10:47,419 INFO L226 Difference]: Without dead ends: 713 [2020-12-21 22:10:47,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:10:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-12-21 22:10:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2020-12-21 22:10:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-21 22:10:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-12-21 22:10:47,435 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2020-12-21 22:10:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:47,435 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-12-21 22:10:47,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 22:10:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-12-21 22:10:47,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 22:10:47,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:47,436 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:47,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:10:47,642 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:47,643 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2020-12-21 22:10:47,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:47,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199069291] [2020-12-21 22:10:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:47,662 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:47,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054273075] [2020-12-21 22:10:47,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:47,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:10:47,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:47,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 22:10:47,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-21 22:10:48,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199069291] [2020-12-21 22:10:48,193 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:48,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054273075] [2020-12-21 22:10:48,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:48,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:10:48,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201245311] [2020-12-21 22:10:48,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:10:48,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:48,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:10:48,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:48,211 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2020-12-21 22:10:48,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:48,366 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-12-21 22:10:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:10:48,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-12-21 22:10:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:48,369 INFO L225 Difference]: With dead ends: 120 [2020-12-21 22:10:48,369 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 22:10:48,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:10:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 22:10:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-12-21 22:10:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 22:10:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-12-21 22:10:48,383 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2020-12-21 22:10:48,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:48,383 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-12-21 22:10:48,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:10:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-12-21 22:10:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 22:10:48,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:48,385 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:48,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:48,601 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:48,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:48,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2020-12-21 22:10:48,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:48,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854539171] [2020-12-21 22:10:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:48,627 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:48,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132938932] [2020-12-21 22:10:48,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:48,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 22:10:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:10:49,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854539171] [2020-12-21 22:10:49,330 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:49,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132938932] [2020-12-21 22:10:49,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:49,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-21 22:10:49,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913390598] [2020-12-21 22:10:49,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 22:10:49,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:49,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 22:10:49,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:10:49,332 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2020-12-21 22:10:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:49,825 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2020-12-21 22:10:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:10:49,826 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-12-21 22:10:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:49,831 INFO L225 Difference]: With dead ends: 1003 [2020-12-21 22:10:49,831 INFO L226 Difference]: Without dead ends: 954 [2020-12-21 22:10:49,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:10:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-12-21 22:10:49,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2020-12-21 22:10:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:10:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2020-12-21 22:10:49,853 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2020-12-21 22:10:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:49,853 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2020-12-21 22:10:49,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 22:10:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2020-12-21 22:10:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-21 22:10:49,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:49,855 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:50,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:50,067 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:50,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:50,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2020-12-21 22:10:50,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:50,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276824977] [2020-12-21 22:10:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:50,090 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:50,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676170239] [2020-12-21 22:10:50,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:50,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:50,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:50,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 22:10:50,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:10:50,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276824977] [2020-12-21 22:10:50,921 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:50,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676170239] [2020-12-21 22:10:50,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:50,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-21 22:10:50,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101817002] [2020-12-21 22:10:50,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:10:50,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:50,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:10:50,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:10:50,924 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2020-12-21 22:10:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:51,540 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2020-12-21 22:10:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 22:10:51,541 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-21 22:10:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:51,547 INFO L225 Difference]: With dead ends: 1163 [2020-12-21 22:10:51,547 INFO L226 Difference]: Without dead ends: 1114 [2020-12-21 22:10:51,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:10:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2020-12-21 22:10:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2020-12-21 22:10:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 22:10:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2020-12-21 22:10:51,576 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2020-12-21 22:10:51,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:51,577 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2020-12-21 22:10:51,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:10:51,577 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2020-12-21 22:10:51,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-21 22:10:51,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:51,578 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:51,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:51,793 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2020-12-21 22:10:51,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:51,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412775886] [2020-12-21 22:10:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:51,817 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:51,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656403976] [2020-12-21 22:10:51,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:52,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 22:10:52,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:52,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 22:10:52,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-12-21 22:10:52,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412775886] [2020-12-21 22:10:52,305 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:52,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656403976] [2020-12-21 22:10:52,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:52,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:10:52,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348420893] [2020-12-21 22:10:52,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:10:52,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:52,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:10:52,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:10:52,310 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2020-12-21 22:10:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:52,504 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2020-12-21 22:10:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:10:52,505 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2020-12-21 22:10:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:52,507 INFO L225 Difference]: With dead ends: 149 [2020-12-21 22:10:52,507 INFO L226 Difference]: Without dead ends: 147 [2020-12-21 22:10:52,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:10:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-21 22:10:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-12-21 22:10:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-21 22:10:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2020-12-21 22:10:52,525 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2020-12-21 22:10:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:52,526 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2020-12-21 22:10:52,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:10:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2020-12-21 22:10:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-21 22:10:52,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:52,527 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:52,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 22:10:52,736 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:52,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:52,737 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2020-12-21 22:10:52,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:52,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531526459] [2020-12-21 22:10:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:52,762 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:52,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155401231] [2020-12-21 22:10:52,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:52,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:10:52,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:52,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 22:10:52,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1476 proven. 44 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-21 22:10:53,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531526459] [2020-12-21 22:10:53,748 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:53,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155401231] [2020-12-21 22:10:53,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:53,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-21 22:10:53,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393756758] [2020-12-21 22:10:53,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:10:53,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:53,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:10:53,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:10:53,751 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2020-12-21 22:10:55,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:55,162 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2020-12-21 22:10:55,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:10:55,163 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2020-12-21 22:10:55,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:55,170 INFO L225 Difference]: With dead ends: 1247 [2020-12-21 22:10:55,171 INFO L226 Difference]: Without dead ends: 1204 [2020-12-21 22:10:55,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=854, Invalid=952, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 22:10:55,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2020-12-21 22:10:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2020-12-21 22:10:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-21 22:10:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2020-12-21 22:10:55,201 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2020-12-21 22:10:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:55,202 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2020-12-21 22:10:55,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:10:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2020-12-21 22:10:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-21 22:10:55,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:55,203 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:55,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:10:55,416 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:55,417 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2020-12-21 22:10:55,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:55,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688142094] [2020-12-21 22:10:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:55,438 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:55,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628606746] [2020-12-21 22:10:55,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:11:09,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-21 22:11:09,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:09,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 22:11:09,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-21 22:11:10,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688142094] [2020-12-21 22:11:10,592 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:10,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628606746] [2020-12-21 22:11:10,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:10,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-21 22:11:10,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985709373] [2020-12-21 22:11:10,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 22:11:10,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:10,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 22:11:10,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:11:10,596 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2020-12-21 22:11:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:11,546 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2020-12-21 22:11:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 22:11:11,547 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-12-21 22:11:11,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:11,554 INFO L225 Difference]: With dead ends: 1515 [2020-12-21 22:11:11,554 INFO L226 Difference]: Without dead ends: 1458 [2020-12-21 22:11:11,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:11:11,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2020-12-21 22:11:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2020-12-21 22:11:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-21 22:11:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-12-21 22:11:11,587 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2020-12-21 22:11:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:11,588 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-12-21 22:11:11,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 22:11:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-12-21 22:11:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-21 22:11:11,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:11,589 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:11,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:11,790 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:11,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2020-12-21 22:11:11,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:11,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299957466] [2020-12-21 22:11:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:11,813 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:11,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728462271] [2020-12-21 22:11:11,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:11:12,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 22:11:12,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:12,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 22:11:12,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-12-21 22:11:12,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299957466] [2020-12-21 22:11:12,724 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:12,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728462271] [2020-12-21 22:11:12,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:12,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:11:12,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975019262] [2020-12-21 22:11:12,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:11:12,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:12,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:11:12,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:11:12,726 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2020-12-21 22:11:12,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:12,965 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2020-12-21 22:11:12,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:11:12,965 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-12-21 22:11:12,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:12,970 INFO L225 Difference]: With dead ends: 172 [2020-12-21 22:11:12,971 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 22:11:12,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:11:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 22:11:12,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-12-21 22:11:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-21 22:11:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2020-12-21 22:11:12,994 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2020-12-21 22:11:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:12,994 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2020-12-21 22:11:12,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:11:12,994 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2020-12-21 22:11:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-21 22:11:12,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:12,995 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:13,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:11:13,201 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:13,202 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2020-12-21 22:11:13,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:13,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041778014] [2020-12-21 22:11:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:13,224 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:13,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270182069] [2020-12-21 22:11:13,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:11:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:13,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 22:11:13,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-21 22:11:14,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041778014] [2020-12-21 22:11:14,625 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:14,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270182069] [2020-12-21 22:11:14,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:14,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-21 22:11:14,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276884723] [2020-12-21 22:11:14,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 22:11:14,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:14,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 22:11:14,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:11:14,629 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2020-12-21 22:11:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:15,942 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2020-12-21 22:11:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:11:15,943 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2020-12-21 22:11:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:15,951 INFO L225 Difference]: With dead ends: 1906 [2020-12-21 22:11:15,952 INFO L226 Difference]: Without dead ends: 1844 [2020-12-21 22:11:15,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:11:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-12-21 22:11:15,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2020-12-21 22:11:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-21 22:11:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2020-12-21 22:11:15,988 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2020-12-21 22:11:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:15,988 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2020-12-21 22:11:15,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 22:11:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2020-12-21 22:11:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-21 22:11:15,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:15,990 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:16,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:16,204 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2020-12-21 22:11:16,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:16,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876705765] [2020-12-21 22:11:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:16,229 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:16,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252009197] [2020-12-21 22:11:16,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:16,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:16,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:16,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 22:11:16,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-21 22:11:17,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876705765] [2020-12-21 22:11:17,853 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:17,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252009197] [2020-12-21 22:11:17,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:17,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-21 22:11:17,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46321350] [2020-12-21 22:11:17,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 22:11:17,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:17,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 22:11:17,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 22:11:17,856 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2020-12-21 22:11:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:19,278 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2020-12-21 22:11:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 22:11:19,279 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2020-12-21 22:11:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:19,285 INFO L225 Difference]: With dead ends: 2156 [2020-12-21 22:11:19,286 INFO L226 Difference]: Without dead ends: 2094 [2020-12-21 22:11:19,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 22:11:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-12-21 22:11:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2020-12-21 22:11:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-21 22:11:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-12-21 22:11:19,328 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2020-12-21 22:11:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:19,329 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-12-21 22:11:19,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 22:11:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-12-21 22:11:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-21 22:11:19,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:19,330 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:19,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:11:19,545 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:19,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2020-12-21 22:11:19,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:19,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458161554] [2020-12-21 22:11:19,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:19,572 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:19,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12093224] [2020-12-21 22:11:19,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:11:20,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 22:11:20,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:20,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:11:20,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3565 backedges. 611 proven. 26 refuted. 0 times theorem prover too weak. 2928 trivial. 0 not checked. [2020-12-21 22:11:20,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458161554] [2020-12-21 22:11:20,331 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:20,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12093224] [2020-12-21 22:11:20,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:20,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:11:20,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361994809] [2020-12-21 22:11:20,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:11:20,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:20,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:11:20,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:20,333 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2020-12-21 22:11:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:20,559 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2020-12-21 22:11:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:11:20,560 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2020-12-21 22:11:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:20,562 INFO L225 Difference]: With dead ends: 371 [2020-12-21 22:11:20,563 INFO L226 Difference]: Without dead ends: 323 [2020-12-21 22:11:20,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-12-21 22:11:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2020-12-21 22:11:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-21 22:11:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2020-12-21 22:11:20,596 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2020-12-21 22:11:20,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:20,596 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2020-12-21 22:11:20,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:11:20,596 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2020-12-21 22:11:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-21 22:11:20,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:20,598 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:20,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:11:20,803 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:20,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:20,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2020-12-21 22:11:20,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:20,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583829732] [2020-12-21 22:11:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:20,831 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:20,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236235306] [2020-12-21 22:11:20,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:11:20,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:20,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:20,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-21 22:11:20,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 3493 proven. 84 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-21 22:11:22,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583829732] [2020-12-21 22:11:22,901 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:22,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236235306] [2020-12-21 22:11:22,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:22,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-21 22:11:22,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720498651] [2020-12-21 22:11:22,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-21 22:11:22,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:22,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-21 22:11:22,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 22:11:22,904 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2020-12-21 22:11:26,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:26,670 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2020-12-21 22:11:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-21 22:11:26,671 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2020-12-21 22:11:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:26,678 INFO L225 Difference]: With dead ends: 2137 [2020-12-21 22:11:26,678 INFO L226 Difference]: Without dead ends: 2089 [2020-12-21 22:11:26,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2020-12-21 22:11:26,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2020-12-21 22:11:26,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2020-12-21 22:11:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-21 22:11:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2020-12-21 22:11:26,726 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2020-12-21 22:11:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:26,726 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2020-12-21 22:11:26,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-21 22:11:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2020-12-21 22:11:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-21 22:11:26,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:26,728 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:26,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:11:26,942 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:26,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:26,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2020-12-21 22:11:26,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:26,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789851644] [2020-12-21 22:11:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:26,970 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:26,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392502362] [2020-12-21 22:11:26,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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