/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/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:12:00,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:12:00,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:12:00,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:12:00,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:12:00,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:12:00,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:12:00,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:12:00,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:12:00,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:12:00,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:12:00,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:12:00,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:12:00,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:12:00,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:12:00,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:12:00,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:12:00,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:12:00,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:12:00,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:12:00,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:12:00,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:12:00,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:12:00,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:12:00,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:12:00,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:12:00,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:12:00,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:12:00,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:12:00,796 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:12:00,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:12:00,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:12:00,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:12:00,799 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:12:00,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:12:00,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:12:00,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:12:00,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:12:00,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:12:00,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:12:00,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:12:00,800 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:12:00,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:12:00,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:12:00,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:12:00,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:12:00,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:12:00,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:12:00,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:12:00,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:12:00,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:12:00,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:12:00,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:12:00,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:12:00,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:12:01,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:12:01,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:12:01,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:12:01,324 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:12:01,325 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:12:01,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:12:01,416 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640b6c576/d256d7d91f8946d4b59ef38c3af08296/FLAG055e6fc50 [2020-12-22 10:12:02,663 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:12:02,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:12:02,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640b6c576/d256d7d91f8946d4b59ef38c3af08296/FLAG055e6fc50 [2020-12-22 10:12:03,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640b6c576/d256d7d91f8946d4b59ef38c3af08296 [2020-12-22 10:12:03,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:12:03,042 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:12:03,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:12:03,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:12:03,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:12:03,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:12:03" (1/1) ... [2020-12-22 10:12:03,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6645f94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:03, skipping insertion in model container [2020-12-22 10:12:03,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:12:03" (1/1) ... [2020-12-22 10:12:03,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:12:03,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:12:03,880 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/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label09.c[20609,20622] [2020-12-22 10:12:03,944 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/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label09.c[28114,28127] [2020-12-22 10:12:05,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:12:05,064 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:12:05,183 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/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label09.c[20609,20622] [2020-12-22 10:12:05,211 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/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label09.c[28114,28127] [2020-12-22 10:12:05,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:12:05,780 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:12:05,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:05 WrapperNode [2020-12-22 10:12:05,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:12:05,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:12:05,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:12:05,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:12:05,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:05" (1/1) ... [2020-12-22 10:12:05,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:05" (1/1) ... [2020-12-22 10:12:06,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:12:06,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:12:06,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:12:06,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:12:06,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:05" (1/1) ... [2020-12-22 10:12:06,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:05" (1/1) ... [2020-12-22 10:12:06,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:05" (1/1) ... [2020-12-22 10:12:06,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:05" (1/1) ... [2020-12-22 10:12:06,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:05" (1/1) ... [2020-12-22 10:12:06,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:05" (1/1) ... [2020-12-22 10:12:06,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:05" (1/1) ... [2020-12-22 10:12:07,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:12:07,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:12:07,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:12:07,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:12:07,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:05" (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 [2020-12-22 10:12:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:12:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:12:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:12:07,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:12:13,087 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:12:13,088 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:12:13,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:12:13 BoogieIcfgContainer [2020-12-22 10:12:13,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:12:13,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:12:13,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:12:13,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:12:13,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:12:03" (1/3) ... [2020-12-22 10:12:13,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e770aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:12:13, skipping insertion in model container [2020-12-22 10:12:13,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:05" (2/3) ... [2020-12-22 10:12:13,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e770aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:12:13, skipping insertion in model container [2020-12-22 10:12:13,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:12:13" (3/3) ... [2020-12-22 10:12:13,109 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:12:13,117 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:12:13,123 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:12:13,143 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:12:13,197 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:12:13,201 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:12:13,202 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:12:13,202 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:12:13,202 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:12:13,202 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:12:13,202 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:12:13,202 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:12:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states. [2020-12-22 10:12:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:12:13,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:13,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:13,263 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:13,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash -949343158, now seen corresponding path program 1 times [2020-12-22 10:12:13,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:13,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742504205] [2020-12-22 10:12:13,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:13,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742504205] [2020-12-22 10:12:13,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:13,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:12:13,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322323598] [2020-12-22 10:12:13,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:12:13,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:13,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:12:13,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:12:13,595 INFO L87 Difference]: Start difference. First operand 945 states. Second operand 2 states. [2020-12-22 10:12:13,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:13,694 INFO L93 Difference]: Finished difference Result 1832 states and 3466 transitions. [2020-12-22 10:12:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:12:13,696 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:12:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:13,742 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:12:13,742 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:12:13,755 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 [2020-12-22 10:12:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:12:13,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:12:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:12:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1655 transitions. [2020-12-22 10:12:13,872 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1655 transitions. Word has length 42 [2020-12-22 10:12:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:13,873 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1655 transitions. [2020-12-22 10:12:13,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:12:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1655 transitions. [2020-12-22 10:12:13,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:12:13,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:13,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:13,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:12:13,877 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2020-12-22 10:12:13,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:13,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675450883] [2020-12-22 10:12:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:14,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675450883] [2020-12-22 10:12:14,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:14,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:12:14,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16597977] [2020-12-22 10:12:14,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:12:14,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:14,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:12:14,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:12:14,106 INFO L87 Difference]: Start difference. First operand 879 states and 1655 transitions. Second operand 5 states. [2020-12-22 10:12:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:14,290 INFO L93 Difference]: Finished difference Result 952 states and 1769 transitions. [2020-12-22 10:12:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:12:14,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:12:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:14,297 INFO L225 Difference]: With dead ends: 952 [2020-12-22 10:12:14,297 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:12:14,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:12:14,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:12:14,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:12:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:12:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1605 transitions. [2020-12-22 10:12:14,326 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1605 transitions. Word has length 42 [2020-12-22 10:12:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:14,327 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1605 transitions. [2020-12-22 10:12:14,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:12:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1605 transitions. [2020-12-22 10:12:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:12:14,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:14,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:14,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:12:14,331 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:14,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1083681591, now seen corresponding path program 1 times [2020-12-22 10:12:14,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:14,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31583123] [2020-12-22 10:12:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:14,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31583123] [2020-12-22 10:12:14,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:14,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:14,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262585642] [2020-12-22 10:12:14,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:12:14,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:14,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:12:14,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:12:14,560 INFO L87 Difference]: Start difference. First operand 879 states and 1605 transitions. Second operand 4 states. [2020-12-22 10:12:26,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:26,202 INFO L93 Difference]: Finished difference Result 3134 states and 5914 transitions. [2020-12-22 10:12:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:12:26,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 10:12:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:26,221 INFO L225 Difference]: With dead ends: 3134 [2020-12-22 10:12:26,221 INFO L226 Difference]: Without dead ends: 2381 [2020-12-22 10:12:26,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:12:26,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2020-12-22 10:12:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2020-12-22 10:12:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2381 states. [2020-12-22 10:12:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 3719 transitions. [2020-12-22 10:12:26,296 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 3719 transitions. Word has length 67 [2020-12-22 10:12:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:26,297 INFO L481 AbstractCegarLoop]: Abstraction has 2381 states and 3719 transitions. [2020-12-22 10:12:26,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:12:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 3719 transitions. [2020-12-22 10:12:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:26,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:26,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:26,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:12:26,302 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:26,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:26,303 INFO L82 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2020-12-22 10:12:26,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:26,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961718816] [2020-12-22 10:12:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:26,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961718816] [2020-12-22 10:12:26,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:26,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:26,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840795928] [2020-12-22 10:12:26,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:26,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:26,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:26,509 INFO L87 Difference]: Start difference. First operand 2381 states and 3719 transitions. Second operand 3 states. [2020-12-22 10:12:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:26,574 INFO L93 Difference]: Finished difference Result 2513 states and 3929 transitions. [2020-12-22 10:12:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:26,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:26,590 INFO L225 Difference]: With dead ends: 2513 [2020-12-22 10:12:26,591 INFO L226 Difference]: Without dead ends: 2444 [2020-12-22 10:12:26,592 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 [2020-12-22 10:12:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2020-12-22 10:12:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2442. [2020-12-22 10:12:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2442 states. [2020-12-22 10:12:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3817 transitions. [2020-12-22 10:12:26,686 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3817 transitions. Word has length 91 [2020-12-22 10:12:26,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:26,687 INFO L481 AbstractCegarLoop]: Abstraction has 2442 states and 3817 transitions. [2020-12-22 10:12:26,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:26,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3817 transitions. [2020-12-22 10:12:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:26,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:26,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:26,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:12:26,691 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:26,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2020-12-22 10:12:26,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:26,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687649579] [2020-12-22 10:12:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:26,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687649579] [2020-12-22 10:12:26,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:26,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:26,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961196651] [2020-12-22 10:12:26,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:26,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:26,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:26,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:26,893 INFO L87 Difference]: Start difference. First operand 2442 states and 3817 transitions. Second operand 3 states. [2020-12-22 10:12:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:26,954 INFO L93 Difference]: Finished difference Result 2690 states and 4213 transitions. [2020-12-22 10:12:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:26,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:26,970 INFO L225 Difference]: With dead ends: 2690 [2020-12-22 10:12:26,970 INFO L226 Difference]: Without dead ends: 2560 [2020-12-22 10:12:26,972 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 [2020-12-22 10:12:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2020-12-22 10:12:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2558. [2020-12-22 10:12:27,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2558 states. [2020-12-22 10:12:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 4002 transitions. [2020-12-22 10:12:27,041 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 4002 transitions. Word has length 91 [2020-12-22 10:12:27,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:27,042 INFO L481 AbstractCegarLoop]: Abstraction has 2558 states and 4002 transitions. [2020-12-22 10:12:27,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 4002 transitions. [2020-12-22 10:12:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:27,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:27,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:27,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:12:27,044 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2020-12-22 10:12:27,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:27,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380202283] [2020-12-22 10:12:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:27,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380202283] [2020-12-22 10:12:27,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:27,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:27,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119385617] [2020-12-22 10:12:27,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:27,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:27,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:27,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:27,173 INFO L87 Difference]: Start difference. First operand 2558 states and 4002 transitions. Second operand 3 states. [2020-12-22 10:12:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:27,232 INFO L93 Difference]: Finished difference Result 3026 states and 4748 transitions. [2020-12-22 10:12:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:27,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:27,248 INFO L225 Difference]: With dead ends: 3026 [2020-12-22 10:12:27,248 INFO L226 Difference]: Without dead ends: 2780 [2020-12-22 10:12:27,251 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 [2020-12-22 10:12:27,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2020-12-22 10:12:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2778. [2020-12-22 10:12:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2778 states. [2020-12-22 10:12:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 4350 transitions. [2020-12-22 10:12:27,331 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 4350 transitions. Word has length 91 [2020-12-22 10:12:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:27,331 INFO L481 AbstractCegarLoop]: Abstraction has 2778 states and 4350 transitions. [2020-12-22 10:12:27,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 4350 transitions. [2020-12-22 10:12:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:27,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:27,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:27,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:12:27,334 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2020-12-22 10:12:27,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:27,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172830435] [2020-12-22 10:12:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:27,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172830435] [2020-12-22 10:12:27,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:27,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:27,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514299262] [2020-12-22 10:12:27,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:27,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:27,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:27,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:27,426 INFO L87 Difference]: Start difference. First operand 2778 states and 4350 transitions. Second operand 3 states. [2020-12-22 10:12:27,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:27,498 INFO L93 Difference]: Finished difference Result 3662 states and 5752 transitions. [2020-12-22 10:12:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:27,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:27,516 INFO L225 Difference]: With dead ends: 3662 [2020-12-22 10:12:27,516 INFO L226 Difference]: Without dead ends: 3196 [2020-12-22 10:12:27,519 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 [2020-12-22 10:12:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2020-12-22 10:12:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 3194. [2020-12-22 10:12:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3194 states. [2020-12-22 10:12:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 5002 transitions. [2020-12-22 10:12:27,617 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 5002 transitions. Word has length 91 [2020-12-22 10:12:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:27,618 INFO L481 AbstractCegarLoop]: Abstraction has 3194 states and 5002 transitions. [2020-12-22 10:12:27,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 5002 transitions. [2020-12-22 10:12:27,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:27,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:27,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:27,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:12:27,620 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:27,621 INFO L82 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2020-12-22 10:12:27,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:27,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691977477] [2020-12-22 10:12:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:27,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691977477] [2020-12-22 10:12:27,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:27,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:27,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37229353] [2020-12-22 10:12:27,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:27,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:27,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:27,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:27,754 INFO L87 Difference]: Start difference. First operand 3194 states and 5002 transitions. Second operand 3 states. [2020-12-22 10:12:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:27,870 INFO L93 Difference]: Finished difference Result 4862 states and 7628 transitions. [2020-12-22 10:12:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:27,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:27,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:27,894 INFO L225 Difference]: With dead ends: 4862 [2020-12-22 10:12:27,895 INFO L226 Difference]: Without dead ends: 3980 [2020-12-22 10:12:27,898 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 [2020-12-22 10:12:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3980 states. [2020-12-22 10:12:28,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3980 to 3978. [2020-12-22 10:12:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3978 states. [2020-12-22 10:12:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 6218 transitions. [2020-12-22 10:12:28,052 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 6218 transitions. Word has length 91 [2020-12-22 10:12:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:28,053 INFO L481 AbstractCegarLoop]: Abstraction has 3978 states and 6218 transitions. [2020-12-22 10:12:28,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 6218 transitions. [2020-12-22 10:12:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:28,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:28,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:28,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:12:28,055 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2020-12-22 10:12:28,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:28,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040294463] [2020-12-22 10:12:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:28,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040294463] [2020-12-22 10:12:28,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:28,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:28,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808873559] [2020-12-22 10:12:28,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:28,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:28,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:28,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:28,246 INFO L87 Difference]: Start difference. First operand 3978 states and 6218 transitions. Second operand 9 states. [2020-12-22 10:12:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:29,918 INFO L93 Difference]: Finished difference Result 27302 states and 42744 transitions. [2020-12-22 10:12:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:12:29,919 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:12:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:30,008 INFO L225 Difference]: With dead ends: 27302 [2020-12-22 10:12:30,009 INFO L226 Difference]: Without dead ends: 25636 [2020-12-22 10:12:30,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:12:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25636 states. [2020-12-22 10:12:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25636 to 5642. [2020-12-22 10:12:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5642 states. [2020-12-22 10:12:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5642 states to 5642 states and 8762 transitions. [2020-12-22 10:12:30,610 INFO L78 Accepts]: Start accepts. Automaton has 5642 states and 8762 transitions. Word has length 91 [2020-12-22 10:12:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:30,611 INFO L481 AbstractCegarLoop]: Abstraction has 5642 states and 8762 transitions. [2020-12-22 10:12:30,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5642 states and 8762 transitions. [2020-12-22 10:12:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:30,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:30,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:30,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:12:30,613 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:30,614 INFO L82 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2020-12-22 10:12:30,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:30,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785152203] [2020-12-22 10:12:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:30,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785152203] [2020-12-22 10:12:30,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:30,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:30,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989958692] [2020-12-22 10:12:30,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:30,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:30,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:30,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:30,725 INFO L87 Difference]: Start difference. First operand 5642 states and 8762 transitions. Second operand 3 states. [2020-12-22 10:12:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:31,183 INFO L93 Difference]: Finished difference Result 11950 states and 18460 transitions. [2020-12-22 10:12:31,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:31,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:12:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:31,207 INFO L225 Difference]: With dead ends: 11950 [2020-12-22 10:12:31,207 INFO L226 Difference]: Without dead ends: 8620 [2020-12-22 10:12:31,216 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 [2020-12-22 10:12:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8620 states. [2020-12-22 10:12:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8620 to 8554. [2020-12-22 10:12:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8554 states. [2020-12-22 10:12:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8554 states to 8554 states and 13082 transitions. [2020-12-22 10:12:31,871 INFO L78 Accepts]: Start accepts. Automaton has 8554 states and 13082 transitions. Word has length 93 [2020-12-22 10:12:31,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:31,871 INFO L481 AbstractCegarLoop]: Abstraction has 8554 states and 13082 transitions. [2020-12-22 10:12:31,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:31,871 INFO L276 IsEmpty]: Start isEmpty. Operand 8554 states and 13082 transitions. [2020-12-22 10:12:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:31,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:31,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:31,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:12:31,873 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:31,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:31,874 INFO L82 PathProgramCache]: Analyzing trace with hash -580253971, now seen corresponding path program 1 times [2020-12-22 10:12:31,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:31,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459456157] [2020-12-22 10:12:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:32,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459456157] [2020-12-22 10:12:32,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:32,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:32,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671054478] [2020-12-22 10:12:32,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:32,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:32,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:32,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:32,199 INFO L87 Difference]: Start difference. First operand 8554 states and 13082 transitions. Second operand 9 states. [2020-12-22 10:12:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:33,103 INFO L93 Difference]: Finished difference Result 14798 states and 22556 transitions. [2020-12-22 10:12:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:33,104 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:12:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:33,126 INFO L225 Difference]: With dead ends: 14798 [2020-12-22 10:12:33,126 INFO L226 Difference]: Without dead ends: 8556 [2020-12-22 10:12:33,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:12:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2020-12-22 10:12:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 8554. [2020-12-22 10:12:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8554 states. [2020-12-22 10:12:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8554 states to 8554 states and 13018 transitions. [2020-12-22 10:12:33,662 INFO L78 Accepts]: Start accepts. Automaton has 8554 states and 13018 transitions. Word has length 93 [2020-12-22 10:12:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:33,662 INFO L481 AbstractCegarLoop]: Abstraction has 8554 states and 13018 transitions. [2020-12-22 10:12:33,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 8554 states and 13018 transitions. [2020-12-22 10:12:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:33,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:33,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:33,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:12:33,665 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:33,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2020-12-22 10:12:33,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:33,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054736287] [2020-12-22 10:12:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:33,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054736287] [2020-12-22 10:12:33,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:33,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:33,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558610531] [2020-12-22 10:12:33,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:33,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:33,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:33,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:33,744 INFO L87 Difference]: Start difference. First operand 8554 states and 13018 transitions. Second operand 3 states. [2020-12-22 10:12:34,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:34,653 INFO L93 Difference]: Finished difference Result 20270 states and 30556 transitions. [2020-12-22 10:12:34,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:34,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:12:34,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:34,686 INFO L225 Difference]: With dead ends: 20270 [2020-12-22 10:12:34,687 INFO L226 Difference]: Without dead ends: 14028 [2020-12-22 10:12:34,698 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 [2020-12-22 10:12:34,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14028 states. [2020-12-22 10:12:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14028 to 14026. [2020-12-22 10:12:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14026 states. [2020-12-22 10:12:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14026 states to 14026 states and 21018 transitions. [2020-12-22 10:12:35,626 INFO L78 Accepts]: Start accepts. Automaton has 14026 states and 21018 transitions. Word has length 93 [2020-12-22 10:12:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:35,627 INFO L481 AbstractCegarLoop]: Abstraction has 14026 states and 21018 transitions. [2020-12-22 10:12:35,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:35,627 INFO L276 IsEmpty]: Start isEmpty. Operand 14026 states and 21018 transitions. [2020-12-22 10:12:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:12:35,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:35,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:35,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:12:35,629 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:35,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:35,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2020-12-22 10:12:35,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:35,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669695733] [2020-12-22 10:12:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:35,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669695733] [2020-12-22 10:12:35,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:35,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:12:35,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814599049] [2020-12-22 10:12:35,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:12:35,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:35,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:12:35,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:12:35,790 INFO L87 Difference]: Start difference. First operand 14026 states and 21018 transitions. Second operand 8 states. [2020-12-22 10:12:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:37,494 INFO L93 Difference]: Finished difference Result 22768 states and 33802 transitions. [2020-12-22 10:12:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:12:37,495 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:12:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:37,547 INFO L225 Difference]: With dead ends: 22768 [2020-12-22 10:12:37,547 INFO L226 Difference]: Without dead ends: 22766 [2020-12-22 10:12:37,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22766 states. [2020-12-22 10:12:38,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22766 to 14410. [2020-12-22 10:12:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14410 states. [2020-12-22 10:12:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14410 states to 14410 states and 21338 transitions. [2020-12-22 10:12:38,782 INFO L78 Accepts]: Start accepts. Automaton has 14410 states and 21338 transitions. Word has length 94 [2020-12-22 10:12:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:38,783 INFO L481 AbstractCegarLoop]: Abstraction has 14410 states and 21338 transitions. [2020-12-22 10:12:38,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:12:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 14410 states and 21338 transitions. [2020-12-22 10:12:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:12:38,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:38,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:38,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:12:38,786 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:38,786 INFO L82 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2020-12-22 10:12:38,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:38,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114844890] [2020-12-22 10:12:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:38,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114844890] [2020-12-22 10:12:38,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:38,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:38,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044142560] [2020-12-22 10:12:38,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:38,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:38,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:38,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:38,868 INFO L87 Difference]: Start difference. First operand 14410 states and 21338 transitions. Second operand 3 states. [2020-12-22 10:12:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:40,016 INFO L93 Difference]: Finished difference Result 26705 states and 39520 transitions. [2020-12-22 10:12:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:40,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:12:40,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:40,062 INFO L225 Difference]: With dead ends: 26705 [2020-12-22 10:12:40,062 INFO L226 Difference]: Without dead ends: 20046 [2020-12-22 10:12:40,076 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 [2020-12-22 10:12:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20046 states. [2020-12-22 10:12:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20046 to 20044. [2020-12-22 10:12:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20044 states. [2020-12-22 10:12:41,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20044 states to 20044 states and 29468 transitions. [2020-12-22 10:12:41,458 INFO L78 Accepts]: Start accepts. Automaton has 20044 states and 29468 transitions. Word has length 95 [2020-12-22 10:12:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:41,458 INFO L481 AbstractCegarLoop]: Abstraction has 20044 states and 29468 transitions. [2020-12-22 10:12:41,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 20044 states and 29468 transitions. [2020-12-22 10:12:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:12:41,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:41,473 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:41,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:12:41,474 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:41,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:41,474 INFO L82 PathProgramCache]: Analyzing trace with hash 388249298, now seen corresponding path program 1 times [2020-12-22 10:12:41,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:41,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190289011] [2020-12-22 10:12:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:12:41,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190289011] [2020-12-22 10:12:41,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:41,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:41,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984169607] [2020-12-22 10:12:41,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:41,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:41,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:41,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:41,665 INFO L87 Difference]: Start difference. First operand 20044 states and 29468 transitions. Second operand 9 states. [2020-12-22 10:12:48,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:48,426 INFO L93 Difference]: Finished difference Result 147612 states and 215332 transitions. [2020-12-22 10:12:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:48,427 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:12:48,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:48,775 INFO L225 Difference]: With dead ends: 147612 [2020-12-22 10:12:48,775 INFO L226 Difference]: Without dead ends: 129882 [2020-12-22 10:12:48,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129882 states. [2020-12-22 10:12:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129882 to 37772. [2020-12-22 10:12:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37772 states. [2020-12-22 10:12:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37772 states to 37772 states and 55132 transitions. [2020-12-22 10:12:52,987 INFO L78 Accepts]: Start accepts. Automaton has 37772 states and 55132 transitions. Word has length 129 [2020-12-22 10:12:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:52,987 INFO L481 AbstractCegarLoop]: Abstraction has 37772 states and 55132 transitions. [2020-12-22 10:12:52,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:52,988 INFO L276 IsEmpty]: Start isEmpty. Operand 37772 states and 55132 transitions. [2020-12-22 10:12:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:12:53,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:53,002 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:53,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:12:53,003 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:53,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1380533518, now seen corresponding path program 1 times [2020-12-22 10:12:53,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:53,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835408149] [2020-12-22 10:12:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:12:53,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835408149] [2020-12-22 10:12:53,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:53,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:53,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901454265] [2020-12-22 10:12:53,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:53,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:53,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:53,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:53,319 INFO L87 Difference]: Start difference. First operand 37772 states and 55132 transitions. Second operand 9 states. [2020-12-22 10:13:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:01,845 INFO L93 Difference]: Finished difference Result 165340 states and 240996 transitions. [2020-12-22 10:13:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:01,846 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:13:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:02,353 INFO L225 Difference]: With dead ends: 165340 [2020-12-22 10:13:02,353 INFO L226 Difference]: Without dead ends: 147610 [2020-12-22 10:13:02,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147610 states. [2020-12-22 10:13:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147610 to 64396. [2020-12-22 10:13:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64396 states. [2020-12-22 10:13:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64396 states to 64396 states and 93468 transitions. [2020-12-22 10:13:07,723 INFO L78 Accepts]: Start accepts. Automaton has 64396 states and 93468 transitions. Word has length 129 [2020-12-22 10:13:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:07,723 INFO L481 AbstractCegarLoop]: Abstraction has 64396 states and 93468 transitions. [2020-12-22 10:13:07,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 64396 states and 93468 transitions. [2020-12-22 10:13:07,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:13:07,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:07,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:07,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:13:07,741 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:07,741 INFO L82 PathProgramCache]: Analyzing trace with hash -248893678, now seen corresponding path program 1 times [2020-12-22 10:13:07,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:07,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792319049] [2020-12-22 10:13:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:13:07,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792319049] [2020-12-22 10:13:07,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:07,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:07,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843073655] [2020-12-22 10:13:07,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:07,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:07,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:07,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:07,939 INFO L87 Difference]: Start difference. First operand 64396 states and 93468 transitions. Second operand 9 states. [2020-12-22 10:13:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:18,607 INFO L93 Difference]: Finished difference Result 183068 states and 266660 transitions. [2020-12-22 10:13:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:18,608 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:13:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:18,854 INFO L225 Difference]: With dead ends: 183068 [2020-12-22 10:13:18,855 INFO L226 Difference]: Without dead ends: 165338 [2020-12-22 10:13:18,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165338 states. [2020-12-22 10:13:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165338 to 82124. [2020-12-22 10:13:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82124 states. [2020-12-22 10:13:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82124 states to 82124 states and 119132 transitions. [2020-12-22 10:13:25,678 INFO L78 Accepts]: Start accepts. Automaton has 82124 states and 119132 transitions. Word has length 129 [2020-12-22 10:13:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:25,679 INFO L481 AbstractCegarLoop]: Abstraction has 82124 states and 119132 transitions. [2020-12-22 10:13:25,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 82124 states and 119132 transitions. [2020-12-22 10:13:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:13:25,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:25,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:25,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:13:25,693 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:25,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:25,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1484352718, now seen corresponding path program 1 times [2020-12-22 10:13:25,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:25,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22536708] [2020-12-22 10:13:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:13:25,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22536708] [2020-12-22 10:13:25,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:25,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:25,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624736646] [2020-12-22 10:13:25,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:25,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:25,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:25,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:25,909 INFO L87 Difference]: Start difference. First operand 82124 states and 119132 transitions. Second operand 9 states. [2020-12-22 10:13:38,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:38,475 INFO L93 Difference]: Finished difference Result 200796 states and 292324 transitions. [2020-12-22 10:13:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:38,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:13:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:38,709 INFO L225 Difference]: With dead ends: 200796 [2020-12-22 10:13:38,710 INFO L226 Difference]: Without dead ends: 183066 [2020-12-22 10:13:38,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183066 states. [2020-12-22 10:13:46,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183066 to 99852. [2020-12-22 10:13:46,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99852 states. [2020-12-22 10:13:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99852 states to 99852 states and 144796 transitions. [2020-12-22 10:13:47,164 INFO L78 Accepts]: Start accepts. Automaton has 99852 states and 144796 transitions. Word has length 129 [2020-12-22 10:13:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:47,165 INFO L481 AbstractCegarLoop]: Abstraction has 99852 states and 144796 transitions. [2020-12-22 10:13:47,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 99852 states and 144796 transitions. [2020-12-22 10:13:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:13:47,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:47,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:47,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:13:47,180 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:47,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:47,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1389619026, now seen corresponding path program 1 times [2020-12-22 10:13:47,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:47,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119295669] [2020-12-22 10:13:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:13:47,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119295669] [2020-12-22 10:13:47,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:47,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:47,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359709526] [2020-12-22 10:13:47,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:47,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:47,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:47,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:47,356 INFO L87 Difference]: Start difference. First operand 99852 states and 144796 transitions. Second operand 9 states. [2020-12-22 10:14:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:03,225 INFO L93 Difference]: Finished difference Result 218524 states and 317988 transitions. [2020-12-22 10:14:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:03,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:14:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:03,512 INFO L225 Difference]: With dead ends: 218524 [2020-12-22 10:14:03,513 INFO L226 Difference]: Without dead ends: 200794 [2020-12-22 10:14:03,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200794 states. [2020-12-22 10:14:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200794 to 117580. [2020-12-22 10:14:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117580 states. [2020-12-22 10:14:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117580 states to 117580 states and 170460 transitions. [2020-12-22 10:14:13,739 INFO L78 Accepts]: Start accepts. Automaton has 117580 states and 170460 transitions. Word has length 129 [2020-12-22 10:14:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:13,740 INFO L481 AbstractCegarLoop]: Abstraction has 117580 states and 170460 transitions. [2020-12-22 10:14:13,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 117580 states and 170460 transitions. [2020-12-22 10:14:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:14:13,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:13,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:13,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:14:13,757 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:13,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:13,757 INFO L82 PathProgramCache]: Analyzing trace with hash 375573628, now seen corresponding path program 1 times [2020-12-22 10:14:13,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:13,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482109798] [2020-12-22 10:14:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:14:14,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482109798] [2020-12-22 10:14:14,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:14,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:14,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577320909] [2020-12-22 10:14:14,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:14,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:14,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:14,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:14,229 INFO L87 Difference]: Start difference. First operand 117580 states and 170460 transitions. Second operand 9 states. [2020-12-22 10:14:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:33,442 INFO L93 Difference]: Finished difference Result 236252 states and 343652 transitions. [2020-12-22 10:14:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:33,443 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:14:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:33,787 INFO L225 Difference]: With dead ends: 236252 [2020-12-22 10:14:33,788 INFO L226 Difference]: Without dead ends: 218522 [2020-12-22 10:14:33,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218522 states. [2020-12-22 10:14:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218522 to 135308. [2020-12-22 10:14:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135308 states. [2020-12-22 10:14:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135308 states to 135308 states and 196124 transitions. [2020-12-22 10:14:46,901 INFO L78 Accepts]: Start accepts. Automaton has 135308 states and 196124 transitions. Word has length 129 [2020-12-22 10:14:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:46,902 INFO L481 AbstractCegarLoop]: Abstraction has 135308 states and 196124 transitions. [2020-12-22 10:14:46,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 135308 states and 196124 transitions. [2020-12-22 10:14:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:14:47,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:47,172 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:47,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:14:47,172 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:47,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:47,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1903775542, now seen corresponding path program 1 times [2020-12-22 10:14:47,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:47,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280828051] [2020-12-22 10:14:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:47,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280828051] [2020-12-22 10:14:47,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:47,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:47,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524515289] [2020-12-22 10:14:47,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:47,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:47,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:47,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:47,316 INFO L87 Difference]: Start difference. First operand 135308 states and 196124 transitions. Second operand 3 states. [2020-12-22 10:14:55,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:55,848 INFO L93 Difference]: Finished difference Result 227509 states and 330571 transitions. [2020-12-22 10:14:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:55,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 10:14:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:55,971 INFO L225 Difference]: With dead ends: 227509 [2020-12-22 10:14:55,971 INFO L226 Difference]: Without dead ends: 94515 [2020-12-22 10:14:56,186 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 [2020-12-22 10:14:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94515 states. [2020-12-22 10:15:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94515 to 94513. [2020-12-22 10:15:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94513 states. [2020-12-22 10:15:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94513 states to 94513 states and 137096 transitions. [2020-12-22 10:15:04,887 INFO L78 Accepts]: Start accepts. Automaton has 94513 states and 137096 transitions. Word has length 131 [2020-12-22 10:15:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:04,887 INFO L481 AbstractCegarLoop]: Abstraction has 94513 states and 137096 transitions. [2020-12-22 10:15:04,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:04,888 INFO L276 IsEmpty]: Start isEmpty. Operand 94513 states and 137096 transitions. [2020-12-22 10:15:05,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:15:05,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:05,058 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:05,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:15:05,058 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:05,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:05,059 INFO L82 PathProgramCache]: Analyzing trace with hash -800734569, now seen corresponding path program 1 times [2020-12-22 10:15:05,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:05,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366805384] [2020-12-22 10:15:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:15:05,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366805384] [2020-12-22 10:15:05,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:05,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:05,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028108392] [2020-12-22 10:15:05,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:05,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:05,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:05,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:05,238 INFO L87 Difference]: Start difference. First operand 94513 states and 137096 transitions. Second operand 9 states. [2020-12-22 10:15:21,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:21,486 INFO L93 Difference]: Finished difference Result 180545 states and 262544 transitions. [2020-12-22 10:15:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:21,490 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-12-22 10:15:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:21,860 INFO L225 Difference]: With dead ends: 180545 [2020-12-22 10:15:21,861 INFO L226 Difference]: Without dead ends: 168255 [2020-12-22 10:15:21,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:22,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168255 states. [2020-12-22 10:15:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168255 to 106801. [2020-12-22 10:15:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106801 states. [2020-12-22 10:15:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106801 states to 106801 states and 154888 transitions. [2020-12-22 10:15:32,851 INFO L78 Accepts]: Start accepts. Automaton has 106801 states and 154888 transitions. Word has length 131 [2020-12-22 10:15:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:32,852 INFO L481 AbstractCegarLoop]: Abstraction has 106801 states and 154888 transitions. [2020-12-22 10:15:32,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 106801 states and 154888 transitions. [2020-12-22 10:15:32,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:15:32,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:32,866 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:32,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:15:32,867 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:32,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:32,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1473709455, now seen corresponding path program 1 times [2020-12-22 10:15:32,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:32,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131138344] [2020-12-22 10:15:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:15:32,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131138344] [2020-12-22 10:15:32,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:32,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:32,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94632143] [2020-12-22 10:15:32,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:32,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:32,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:32,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:32,947 INFO L87 Difference]: Start difference. First operand 106801 states and 154888 transitions. Second operand 3 states. [2020-12-22 10:15:38,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:38,451 INFO L93 Difference]: Finished difference Result 159029 states and 230506 transitions. [2020-12-22 10:15:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:38,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 10:15:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:38,514 INFO L225 Difference]: With dead ends: 159029 [2020-12-22 10:15:38,514 INFO L226 Difference]: Without dead ends: 54579 [2020-12-22 10:15:38,562 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 [2020-12-22 10:15:38,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54579 states. [2020-12-22 10:15:43,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54579 to 54577. [2020-12-22 10:15:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54577 states. [2020-12-22 10:15:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54577 states to 54577 states and 78728 transitions. [2020-12-22 10:15:43,840 INFO L78 Accepts]: Start accepts. Automaton has 54577 states and 78728 transitions. Word has length 132 [2020-12-22 10:15:43,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:43,840 INFO L481 AbstractCegarLoop]: Abstraction has 54577 states and 78728 transitions. [2020-12-22 10:15:43,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 54577 states and 78728 transitions. [2020-12-22 10:15:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:15:43,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:43,846 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:43,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:15:43,847 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:43,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1811184295, now seen corresponding path program 1 times [2020-12-22 10:15:43,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:43,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59706043] [2020-12-22 10:15:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:15:44,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59706043] [2020-12-22 10:15:44,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193392309] [2020-12-22 10:15:44,101 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 [2020-12-22 10:15:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:15:44,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:15:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:15:44,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:15:44,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 10:15:44,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620160798] [2020-12-22 10:15:44,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:15:44,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:44,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:15:44,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:15:44,937 INFO L87 Difference]: Start difference. First operand 54577 states and 78728 transitions. Second operand 12 states.