/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-lopstr16/single_elem_safe.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:47:43,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:47:43,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:47:43,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:47:43,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:47:43,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:47:43,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:47:43,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:47:43,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:47:43,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:47:43,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:47:43,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:47:43,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:47:43,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:47:43,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:47:43,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:47:43,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:47:43,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:47:43,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:47:43,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:47:43,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:47:43,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:47:43,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:47:43,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:47:43,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:47:43,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:47:43,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:47:43,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:47:43,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:47:43,829 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:47:43,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:47:43,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:47:43,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:47:43,834 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:47:43,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:47:43,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:47:43,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:47:43,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:47:43,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:47:43,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:47:43,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:47:43,838 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:47:43,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:47:43,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:47:43,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:47:43,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:47:43,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:47:43,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:47:43,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:47:43,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:47:43,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:47:43,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:47:43,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:47:43,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:47:43,842 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:47:44,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:47:44,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:47:44,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:47:44,354 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:47:44,355 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:47:44,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/single_elem_safe.i [2020-12-21 22:47:44,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bf567dcc/c61827c4b7614fbea571f2d4f039fc82/FLAG9428d8747 [2020-12-21 22:47:45,097 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:47:45,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/single_elem_safe.i [2020-12-21 22:47:45,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bf567dcc/c61827c4b7614fbea571f2d4f039fc82/FLAG9428d8747 [2020-12-21 22:47:45,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bf567dcc/c61827c4b7614fbea571f2d4f039fc82 [2020-12-21 22:47:45,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:47:45,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:47:45,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:47:45,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:47:45,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:47:45,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:47:45" (1/1) ... [2020-12-21 22:47:45,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f463ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45, skipping insertion in model container [2020-12-21 22:47:45,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:47:45" (1/1) ... [2020-12-21 22:47:45,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:47:45,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:47:45,670 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-lopstr16/single_elem_safe.i[809,822] [2020-12-21 22:47:45,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:47:45,732 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:47:45,750 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-lopstr16/single_elem_safe.i[809,822] [2020-12-21 22:47:45,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:47:45,812 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:47:45,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45 WrapperNode [2020-12-21 22:47:45,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:47:45,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:47:45,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:47:45,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:47:45,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45" (1/1) ... [2020-12-21 22:47:45,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45" (1/1) ... [2020-12-21 22:47:45,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:47:45,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:47:45,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:47:45,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:47:45,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45" (1/1) ... [2020-12-21 22:47:45,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45" (1/1) ... [2020-12-21 22:47:45,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45" (1/1) ... [2020-12-21 22:47:45,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45" (1/1) ... [2020-12-21 22:47:45,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45" (1/1) ... [2020-12-21 22:47:45,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45" (1/1) ... [2020-12-21 22:47:45,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45" (1/1) ... [2020-12-21 22:47:45,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:47:45,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:47:45,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:47:45,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:47:45,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45" (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 22:47:46,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-21 22:47:46,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-21 22:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-21 22:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:47:46,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:47:46,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:47:46,533 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:47:46,534 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 22:47:46,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:47:46 BoogieIcfgContainer [2020-12-21 22:47:46,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:47:46,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:47:46,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:47:46,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:47:46,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:47:45" (1/3) ... [2020-12-21 22:47:46,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e61b935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:47:46, skipping insertion in model container [2020-12-21 22:47:46,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:45" (2/3) ... [2020-12-21 22:47:46,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e61b935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:47:46, skipping insertion in model container [2020-12-21 22:47:46,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:47:46" (3/3) ... [2020-12-21 22:47:46,551 INFO L111 eAbstractionObserver]: Analyzing ICFG single_elem_safe.i [2020-12-21 22:47:46,558 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:47:46,565 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:47:46,591 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:47:46,641 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:47:46,641 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:47:46,641 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:47:46,641 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:47:46,642 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:47:46,642 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:47:46,642 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:47:46,642 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:47:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-21 22:47:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:47:46,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:46,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:46,670 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:46,677 INFO L82 PathProgramCache]: Analyzing trace with hash -739796340, now seen corresponding path program 1 times [2020-12-21 22:47:46,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:46,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79091010] [2020-12-21 22:47:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:46,905 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 22:47:46,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79091010] [2020-12-21 22:47:46,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:47:46,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:47:46,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976644967] [2020-12-21 22:47:46,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:47:46,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:46,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:47:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:47:46,938 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-21 22:47:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:46,957 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2020-12-21 22:47:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:47:46,958 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 22:47:46,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:46,988 INFO L225 Difference]: With dead ends: 34 [2020-12-21 22:47:46,989 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 22:47:46,992 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 22:47:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 22:47:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 22:47:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 22:47:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2020-12-21 22:47:47,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 9 [2020-12-21 22:47:47,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:47,032 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2020-12-21 22:47:47,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:47:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2020-12-21 22:47:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:47:47,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:47,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:47,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:47:47,036 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:47,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:47,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1452551885, now seen corresponding path program 1 times [2020-12-21 22:47:47,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:47,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443637114] [2020-12-21 22:47:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:47,164 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 22:47:47,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443637114] [2020-12-21 22:47:47,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:47:47,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:47:47,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64319492] [2020-12-21 22:47:47,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:47:47,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:47,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:47:47,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:47:47,169 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand 3 states. [2020-12-21 22:47:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:47,229 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-12-21 22:47:47,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:47:47,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 22:47:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:47,233 INFO L225 Difference]: With dead ends: 40 [2020-12-21 22:47:47,233 INFO L226 Difference]: Without dead ends: 31 [2020-12-21 22:47:47,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:47:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-21 22:47:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 18. [2020-12-21 22:47:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:47:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2020-12-21 22:47:47,246 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 9 [2020-12-21 22:47:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:47,247 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2020-12-21 22:47:47,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:47:47,248 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2020-12-21 22:47:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:47:47,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:47,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:47,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:47:47,250 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:47,252 INFO L82 PathProgramCache]: Analyzing trace with hash 479393663, now seen corresponding path program 1 times [2020-12-21 22:47:47,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:47,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794858320] [2020-12-21 22:47:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:47,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794858320] [2020-12-21 22:47:47,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:47:47,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:47:47,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103478473] [2020-12-21 22:47:47,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:47:47,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:47,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:47:47,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:47:47,388 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand 3 states. [2020-12-21 22:47:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:47,429 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2020-12-21 22:47:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:47:47,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-21 22:47:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:47,431 INFO L225 Difference]: With dead ends: 47 [2020-12-21 22:47:47,431 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 22:47:47,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:47:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 22:47:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 19. [2020-12-21 22:47:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 22:47:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2020-12-21 22:47:47,450 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 14 [2020-12-21 22:47:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:47,451 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-12-21 22:47:47,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:47:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-12-21 22:47:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:47:47,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:47,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:47,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 22:47:47,454 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1180458241, now seen corresponding path program 1 times [2020-12-21 22:47:47,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:47,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137679834] [2020-12-21 22:47:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:47,559 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 22:47:47,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137679834] [2020-12-21 22:47:47,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441375157] [2020-12-21 22:47:47,560 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 22:47:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:47,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 22:47:47,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:47:47,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:47:47,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 22:47:47,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978540575] [2020-12-21 22:47:47,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:47:47,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:47:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:47:47,694 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 3 states. [2020-12-21 22:47:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:47,714 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2020-12-21 22:47:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:47:47,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-21 22:47:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:47,716 INFO L225 Difference]: With dead ends: 28 [2020-12-21 22:47:47,717 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 22:47:47,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:47:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 22:47:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-21 22:47:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 22:47:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-12-21 22:47:47,726 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 14 [2020-12-21 22:47:47,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:47,726 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-12-21 22:47:47,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:47:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2020-12-21 22:47:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:47:47,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:47,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:47,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:47,942 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:47,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1180398659, now seen corresponding path program 1 times [2020-12-21 22:47:47,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:47,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751764475] [2020-12-21 22:47:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:48,025 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 22:47:48,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751764475] [2020-12-21 22:47:48,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200785668] [2020-12-21 22:47:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:48,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:47:48,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:48,196 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 22:47:48,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:48,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 22:47:48,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998715707] [2020-12-21 22:47:48,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:47:48,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:48,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:47:48,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:47:48,202 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 5 states. [2020-12-21 22:47:48,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:48,288 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2020-12-21 22:47:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:47:48,289 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 22:47:48,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:48,290 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:47:48,290 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 22:47:48,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:47:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 22:47:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2020-12-21 22:47:48,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 22:47:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-12-21 22:47:48,301 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 14 [2020-12-21 22:47:48,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:48,301 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-12-21 22:47:48,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:47:48,302 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-12-21 22:47:48,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:47:48,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:48,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:48,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:48,520 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash -795862731, now seen corresponding path program 2 times [2020-12-21 22:47:48,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:48,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174938014] [2020-12-21 22:47:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:48,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174938014] [2020-12-21 22:47:48,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624559848] [2020-12-21 22:47:48,574 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 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 22:47:48,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:47:48,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:48,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:47:48,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:48,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:48,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 22:47:48,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699570775] [2020-12-21 22:47:48,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:47:48,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:48,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:47:48,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:47:48,710 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 6 states. [2020-12-21 22:47:48,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:48,758 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2020-12-21 22:47:48,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:47:48,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-21 22:47:48,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:48,760 INFO L225 Difference]: With dead ends: 77 [2020-12-21 22:47:48,760 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 22:47:48,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:47:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 22:47:48,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2020-12-21 22:47:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:47:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2020-12-21 22:47:48,767 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 19 [2020-12-21 22:47:48,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:48,767 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2020-12-21 22:47:48,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:47:48,767 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2020-12-21 22:47:48,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 22:47:48,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:48,768 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:48,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:48,982 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash -23676029, now seen corresponding path program 3 times [2020-12-21 22:47:48,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:48,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951319053] [2020-12-21 22:47:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:49,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951319053] [2020-12-21 22:47:49,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409326083] [2020-12-21 22:47:49,046 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 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 22:47:49,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:47:49,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:49,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:47:49,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:49,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:49,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 22:47:49,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210304518] [2020-12-21 22:47:49,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:47:49,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:49,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:47:49,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:47:49,175 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 7 states. [2020-12-21 22:47:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:49,253 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2020-12-21 22:47:49,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:47:49,254 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-21 22:47:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:49,257 INFO L225 Difference]: With dead ends: 93 [2020-12-21 22:47:49,257 INFO L226 Difference]: Without dead ends: 83 [2020-12-21 22:47:49,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:47:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-21 22:47:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 41. [2020-12-21 22:47:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 22:47:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2020-12-21 22:47:49,276 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 24 [2020-12-21 22:47:49,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:49,276 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2020-12-21 22:47:49,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:47:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2020-12-21 22:47:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:47:49,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:49,281 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:49,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:49,482 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:49,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1702929931, now seen corresponding path program 4 times [2020-12-21 22:47:49,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:49,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829792803] [2020-12-21 22:47:49,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:49,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829792803] [2020-12-21 22:47:49,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503867490] [2020-12-21 22:47:49,557 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 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 22:47:49,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:47:49,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:49,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:47:49,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:49,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:49,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 22:47:49,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714961946] [2020-12-21 22:47:49,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:47:49,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:49,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:47:49,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:47:49,699 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand 8 states. [2020-12-21 22:47:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:49,758 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2020-12-21 22:47:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:47:49,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-12-21 22:47:49,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:49,759 INFO L225 Difference]: With dead ends: 109 [2020-12-21 22:47:49,760 INFO L226 Difference]: Without dead ends: 99 [2020-12-21 22:47:49,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:47:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-21 22:47:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 48. [2020-12-21 22:47:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:47:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2020-12-21 22:47:49,766 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 29 [2020-12-21 22:47:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:49,766 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2020-12-21 22:47:49,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:47:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2020-12-21 22:47:49,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-21 22:47:49,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:49,768 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:49,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:49,981 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:49,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1882066237, now seen corresponding path program 5 times [2020-12-21 22:47:49,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:49,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255119024] [2020-12-21 22:47:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:50,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255119024] [2020-12-21 22:47:50,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184696817] [2020-12-21 22:47:50,071 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 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 22:47:50,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 22:47:50,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:50,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:47:50,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:50,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:50,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 22:47:50,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712249898] [2020-12-21 22:47:50,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:47:50,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:50,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:47:50,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:47:50,297 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand 9 states. [2020-12-21 22:47:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:50,364 INFO L93 Difference]: Finished difference Result 125 states and 164 transitions. [2020-12-21 22:47:50,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:47:50,379 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-12-21 22:47:50,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:50,380 INFO L225 Difference]: With dead ends: 125 [2020-12-21 22:47:50,381 INFO L226 Difference]: Without dead ends: 115 [2020-12-21 22:47:50,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:47:50,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-21 22:47:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 55. [2020-12-21 22:47:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-21 22:47:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2020-12-21 22:47:50,387 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 34 [2020-12-21 22:47:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:50,387 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2020-12-21 22:47:50,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:47:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2020-12-21 22:47:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 22:47:50,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:50,389 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:50,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:50,605 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash -572216651, now seen corresponding path program 6 times [2020-12-21 22:47:50,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:50,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978297297] [2020-12-21 22:47:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:50,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978297297] [2020-12-21 22:47:50,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308951952] [2020-12-21 22:47:50,750 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 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 22:47:51,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 22:47:51,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:51,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:47:51,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:51,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:51,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 22:47:51,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527238276] [2020-12-21 22:47:51,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:47:51,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:51,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:47:51,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:47:51,198 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand 10 states. [2020-12-21 22:47:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:51,288 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2020-12-21 22:47:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:47:51,288 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-12-21 22:47:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:51,289 INFO L225 Difference]: With dead ends: 141 [2020-12-21 22:47:51,289 INFO L226 Difference]: Without dead ends: 131 [2020-12-21 22:47:51,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:47:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-21 22:47:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 62. [2020-12-21 22:47:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 22:47:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-12-21 22:47:51,295 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 39 [2020-12-21 22:47:51,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:51,296 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-12-21 22:47:51,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:47:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-12-21 22:47:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 22:47:51,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:51,297 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:51,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:47:51,511 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:51,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:51,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1860246019, now seen corresponding path program 7 times [2020-12-21 22:47:51,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:51,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637173730] [2020-12-21 22:47:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:51,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637173730] [2020-12-21 22:47:51,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695494072] [2020-12-21 22:47:51,662 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 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 22:47:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:51,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:47:51,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:51,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:51,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 22:47:51,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154930835] [2020-12-21 22:47:51,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:47:51,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:51,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:47:51,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:47:51,820 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 11 states. [2020-12-21 22:47:51,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:51,976 INFO L93 Difference]: Finished difference Result 157 states and 206 transitions. [2020-12-21 22:47:51,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:47:51,977 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-12-21 22:47:51,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:51,981 INFO L225 Difference]: With dead ends: 157 [2020-12-21 22:47:51,981 INFO L226 Difference]: Without dead ends: 147 [2020-12-21 22:47:51,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:47:51,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-21 22:47:51,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 69. [2020-12-21 22:47:51,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-21 22:47:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 96 transitions. [2020-12-21 22:47:51,990 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 96 transitions. Word has length 44 [2020-12-21 22:47:51,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:51,991 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 96 transitions. [2020-12-21 22:47:51,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:47:51,991 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 96 transitions. [2020-12-21 22:47:51,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:47:51,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:51,996 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:52,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:47:52,198 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:52,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:52,199 INFO L82 PathProgramCache]: Analyzing trace with hash 174852981, now seen corresponding path program 8 times [2020-12-21 22:47:52,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:52,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464412379] [2020-12-21 22:47:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:52,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464412379] [2020-12-21 22:47:52,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390132339] [2020-12-21 22:47:52,364 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 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 22:47:52,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:47:52,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:52,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:47:52,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:52,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:52,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 22:47:52,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525918199] [2020-12-21 22:47:52,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:47:52,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:52,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:47:52,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:47:52,520 INFO L87 Difference]: Start difference. First operand 69 states and 96 transitions. Second operand 12 states. [2020-12-21 22:47:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:52,629 INFO L93 Difference]: Finished difference Result 173 states and 227 transitions. [2020-12-21 22:47:52,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:47:52,630 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-12-21 22:47:52,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:52,631 INFO L225 Difference]: With dead ends: 173 [2020-12-21 22:47:52,631 INFO L226 Difference]: Without dead ends: 163 [2020-12-21 22:47:52,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:47:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-21 22:47:52,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 76. [2020-12-21 22:47:52,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 22:47:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-12-21 22:47:52,637 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 49 [2020-12-21 22:47:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:52,637 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-12-21 22:47:52,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:47:52,638 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-12-21 22:47:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 22:47:52,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:52,639 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:52,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:52,853 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:52,854 INFO L82 PathProgramCache]: Analyzing trace with hash 395850051, now seen corresponding path program 9 times [2020-12-21 22:47:52,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:52,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981676910] [2020-12-21 22:47:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:52,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981676910] [2020-12-21 22:47:52,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315535267] [2020-12-21 22:47:52,993 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 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 22:47:53,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 22:47:53,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:53,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:47:53,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:53,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:53,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 22:47:53,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779388626] [2020-12-21 22:47:53,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:47:53,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:53,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:47:53,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:47:53,747 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 13 states. [2020-12-21 22:47:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:53,858 INFO L93 Difference]: Finished difference Result 189 states and 248 transitions. [2020-12-21 22:47:53,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:47:53,858 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-12-21 22:47:53,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:53,864 INFO L225 Difference]: With dead ends: 189 [2020-12-21 22:47:53,864 INFO L226 Difference]: Without dead ends: 179 [2020-12-21 22:47:53,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:47:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-21 22:47:53,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 83. [2020-12-21 22:47:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 22:47:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2020-12-21 22:47:53,874 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 54 [2020-12-21 22:47:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:53,874 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2020-12-21 22:47:53,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:47:53,874 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2020-12-21 22:47:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 22:47:53,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:53,878 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:54,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:54,092 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:54,093 INFO L82 PathProgramCache]: Analyzing trace with hash -389972939, now seen corresponding path program 10 times [2020-12-21 22:47:54,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:54,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96116457] [2020-12-21 22:47:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:54,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96116457] [2020-12-21 22:47:54,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414043250] [2020-12-21 22:47:54,281 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 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 22:47:54,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:47:54,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:54,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:47:54,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:54,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:54,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 22:47:54,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634493894] [2020-12-21 22:47:54,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:47:54,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:47:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:47:54,619 INFO L87 Difference]: Start difference. First operand 83 states and 116 transitions. Second operand 14 states. [2020-12-21 22:47:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:54,764 INFO L93 Difference]: Finished difference Result 205 states and 269 transitions. [2020-12-21 22:47:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:47:54,764 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-12-21 22:47:54,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:54,766 INFO L225 Difference]: With dead ends: 205 [2020-12-21 22:47:54,766 INFO L226 Difference]: Without dead ends: 195 [2020-12-21 22:47:54,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:47:54,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-21 22:47:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 90. [2020-12-21 22:47:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 22:47:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-12-21 22:47:54,772 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-12-21 22:47:54,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:54,772 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-12-21 22:47:54,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:47:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-12-21 22:47:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-21 22:47:54,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:54,774 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:54,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:47:54,988 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:54,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1288386691, now seen corresponding path program 11 times [2020-12-21 22:47:54,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:54,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342113909] [2020-12-21 22:47:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:55,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342113909] [2020-12-21 22:47:55,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799546213] [2020-12-21 22:47:55,169 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 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 22:47:55,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 22:47:55,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:55,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:47:55,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:55,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:55,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 22:47:55,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860370677] [2020-12-21 22:47:55,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 22:47:55,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:55,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 22:47:55,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:47:55,708 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 15 states. [2020-12-21 22:47:55,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:55,848 INFO L93 Difference]: Finished difference Result 221 states and 290 transitions. [2020-12-21 22:47:55,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:47:55,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-21 22:47:55,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:55,861 INFO L225 Difference]: With dead ends: 221 [2020-12-21 22:47:55,861 INFO L226 Difference]: Without dead ends: 211 [2020-12-21 22:47:55,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:47:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-21 22:47:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 97. [2020-12-21 22:47:55,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-21 22:47:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2020-12-21 22:47:55,867 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 64 [2020-12-21 22:47:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:55,867 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2020-12-21 22:47:55,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 22:47:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2020-12-21 22:47:55,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 22:47:55,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:55,868 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:56,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:47:56,083 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1519451381, now seen corresponding path program 12 times [2020-12-21 22:47:56,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:56,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418936320] [2020-12-21 22:47:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:56,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418936320] [2020-12-21 22:47:56,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254200338] [2020-12-21 22:47:56,340 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 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 22:47:59,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 22:47:59,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:59,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:47:59,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:59,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:59,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 22:47:59,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092384506] [2020-12-21 22:47:59,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:47:59,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:59,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:47:59,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:47:59,453 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 16 states. [2020-12-21 22:47:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:59,610 INFO L93 Difference]: Finished difference Result 237 states and 311 transitions. [2020-12-21 22:47:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:47:59,610 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-12-21 22:47:59,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:59,612 INFO L225 Difference]: With dead ends: 237 [2020-12-21 22:47:59,612 INFO L226 Difference]: Without dead ends: 227 [2020-12-21 22:47:59,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:47:59,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-21 22:47:59,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 104. [2020-12-21 22:47:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-21 22:47:59,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 146 transitions. [2020-12-21 22:47:59,618 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 146 transitions. Word has length 69 [2020-12-21 22:47:59,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:59,619 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 146 transitions. [2020-12-21 22:47:59,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:47:59,619 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 146 transitions. [2020-12-21 22:47:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-21 22:47:59,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:59,620 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:59,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:47:59,835 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:59,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:59,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1481519043, now seen corresponding path program 13 times [2020-12-21 22:47:59,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:59,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129155484] [2020-12-21 22:47:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:00,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129155484] [2020-12-21 22:48:00,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781508187] [2020-12-21 22:48:00,051 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 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 22:48:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:00,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:48:00,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:00,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:00,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 22:48:00,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333293404] [2020-12-21 22:48:00,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:48:00,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:00,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:48:00,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:48:00,257 INFO L87 Difference]: Start difference. First operand 104 states and 146 transitions. Second operand 17 states. [2020-12-21 22:48:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:00,424 INFO L93 Difference]: Finished difference Result 253 states and 332 transitions. [2020-12-21 22:48:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:48:00,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2020-12-21 22:48:00,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:00,426 INFO L225 Difference]: With dead ends: 253 [2020-12-21 22:48:00,426 INFO L226 Difference]: Without dead ends: 243 [2020-12-21 22:48:00,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:48:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-21 22:48:00,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 111. [2020-12-21 22:48:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-21 22:48:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 156 transitions. [2020-12-21 22:48:00,433 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 156 transitions. Word has length 74 [2020-12-21 22:48:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:00,433 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 156 transitions. [2020-12-21 22:48:00,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:48:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 156 transitions. [2020-12-21 22:48:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 22:48:00,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:00,434 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:00,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:48:00,647 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:00,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:00,648 INFO L82 PathProgramCache]: Analyzing trace with hash 445025717, now seen corresponding path program 14 times [2020-12-21 22:48:00,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:00,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286215081] [2020-12-21 22:48:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:00,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286215081] [2020-12-21 22:48:00,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906188236] [2020-12-21 22:48:00,888 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 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 22:48:01,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:48:01,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:01,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:48:01,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:01,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:01,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 22:48:01,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296830837] [2020-12-21 22:48:01,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:48:01,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:01,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:48:01,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:48:01,119 INFO L87 Difference]: Start difference. First operand 111 states and 156 transitions. Second operand 18 states. [2020-12-21 22:48:01,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:01,282 INFO L93 Difference]: Finished difference Result 269 states and 353 transitions. [2020-12-21 22:48:01,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:48:01,282 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-12-21 22:48:01,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:01,284 INFO L225 Difference]: With dead ends: 269 [2020-12-21 22:48:01,284 INFO L226 Difference]: Without dead ends: 259 [2020-12-21 22:48:01,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:48:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-21 22:48:01,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 118. [2020-12-21 22:48:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-21 22:48:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2020-12-21 22:48:01,289 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 79 [2020-12-21 22:48:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:01,290 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2020-12-21 22:48:01,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:48:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2020-12-21 22:48:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 22:48:01,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:01,291 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:01,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:48:01,505 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:01,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:01,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1257576195, now seen corresponding path program 15 times [2020-12-21 22:48:01,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:01,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627435540] [2020-12-21 22:48:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:01,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627435540] [2020-12-21 22:48:01,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724844745] [2020-12-21 22:48:01,733 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 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 22:48:12,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-21 22:48:12,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:12,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:48:12,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:12,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:12,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 22:48:12,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213323700] [2020-12-21 22:48:12,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 22:48:12,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:12,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 22:48:12,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:48:12,595 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand 19 states. [2020-12-21 22:48:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:12,789 INFO L93 Difference]: Finished difference Result 285 states and 374 transitions. [2020-12-21 22:48:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:48:12,790 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 84 [2020-12-21 22:48:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:12,791 INFO L225 Difference]: With dead ends: 285 [2020-12-21 22:48:12,791 INFO L226 Difference]: Without dead ends: 275 [2020-12-21 22:48:12,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:48:12,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-21 22:48:12,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 125. [2020-12-21 22:48:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:48:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 176 transitions. [2020-12-21 22:48:12,797 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 176 transitions. Word has length 84 [2020-12-21 22:48:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:12,798 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 176 transitions. [2020-12-21 22:48:12,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 22:48:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 176 transitions. [2020-12-21 22:48:12,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 22:48:12,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:12,799 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:12,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:48:13,000 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2085498485, now seen corresponding path program 16 times [2020-12-21 22:48:13,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:13,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705306748] [2020-12-21 22:48:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:13,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705306748] [2020-12-21 22:48:13,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774625992] [2020-12-21 22:48:13,269 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 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 22:48:13,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:48:13,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:13,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:48:13,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:14,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:14,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 22:48:14,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277996115] [2020-12-21 22:48:14,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:48:14,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:14,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:48:14,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:48:14,152 INFO L87 Difference]: Start difference. First operand 125 states and 176 transitions. Second operand 20 states. [2020-12-21 22:48:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:14,345 INFO L93 Difference]: Finished difference Result 301 states and 395 transitions. [2020-12-21 22:48:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 22:48:14,345 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-12-21 22:48:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:14,347 INFO L225 Difference]: With dead ends: 301 [2020-12-21 22:48:14,347 INFO L226 Difference]: Without dead ends: 291 [2020-12-21 22:48:14,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:48:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-21 22:48:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 132. [2020-12-21 22:48:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-21 22:48:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 186 transitions. [2020-12-21 22:48:14,358 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 186 transitions. Word has length 89 [2020-12-21 22:48:14,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:14,359 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 186 transitions. [2020-12-21 22:48:14,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:48:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 186 transitions. [2020-12-21 22:48:14,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-21 22:48:14,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:14,360 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:14,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:48:14,574 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:14,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1016327747, now seen corresponding path program 17 times [2020-12-21 22:48:14,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:14,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410067642] [2020-12-21 22:48:14,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:14,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410067642] [2020-12-21 22:48:14,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611511088] [2020-12-21 22:48:14,924 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 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 22:49:05,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 22:49:05,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:49:05,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:49:05,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:49:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:49:05,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:49:05,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 22:49:05,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441650466] [2020-12-21 22:49:05,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 22:49:05,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:49:05,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 22:49:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:49:05,505 INFO L87 Difference]: Start difference. First operand 132 states and 186 transitions. Second operand 21 states. [2020-12-21 22:49:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:49:05,709 INFO L93 Difference]: Finished difference Result 317 states and 416 transitions. [2020-12-21 22:49:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:49:05,709 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2020-12-21 22:49:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:49:05,711 INFO L225 Difference]: With dead ends: 317 [2020-12-21 22:49:05,711 INFO L226 Difference]: Without dead ends: 307 [2020-12-21 22:49:05,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:49:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-21 22:49:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 139. [2020-12-21 22:49:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-21 22:49:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 196 transitions. [2020-12-21 22:49:05,718 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 196 transitions. Word has length 94 [2020-12-21 22:49:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:49:05,718 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 196 transitions. [2020-12-21 22:49:05,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 22:49:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 196 transitions. [2020-12-21 22:49:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-21 22:49:05,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:49:05,719 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:49:05,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 22:49:05,934 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:49:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:49:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash 747888437, now seen corresponding path program 18 times [2020-12-21 22:49:05,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:49:05,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800197777] [2020-12-21 22:49:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:49:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:49:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:49:06,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800197777] [2020-12-21 22:49:06,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700972993] [2020-12-21 22:49:06,246 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 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