/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.ufo.BOUNDED-14.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:12:37,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:12:37,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:12:37,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:12:37,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:12:37,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:12:37,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:12:37,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:12:37,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:12:37,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:12:37,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:12:37,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:12:37,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:12:37,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:12:37,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:12:37,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:12:37,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:12:37,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:12:37,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:12:37,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:12:37,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:12:37,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:12:37,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:12:37,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:12:37,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:12:37,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:12:37,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:12:37,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:12:37,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:12:38,069 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:12:38,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:12:38,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:12:38,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:12:38,074 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:12:38,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:12:38,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:12:38,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:12:38,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:12:38,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:12:38,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:12:38,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:12:38,077 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:12:38,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:12:38,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:12:38,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:12:38,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:12:38,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:12:38,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:12:38,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:12:38,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:12:38,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:12:38,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:12:38,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:12:38,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:12:38,080 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:12:38,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:12:38,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:12:38,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:12:38,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:12:38,503 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:12:38,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label01.c [2020-12-22 10:12:38,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9153677b/ac0fe80a6a4648a7ad429f979091b5c6/FLAG75b1aa644 [2020-12-22 10:12:39,658 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:12:39,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label01.c [2020-12-22 10:12:39,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9153677b/ac0fe80a6a4648a7ad429f979091b5c6/FLAG75b1aa644 [2020-12-22 10:12:40,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9153677b/ac0fe80a6a4648a7ad429f979091b5c6 [2020-12-22 10:12:40,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:12:40,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:12:40,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:12:40,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:12:40,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:12:40,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:12:40" (1/1) ... [2020-12-22 10:12:40,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d1e6a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:40, skipping insertion in model container [2020-12-22 10:12:40,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:12:40" (1/1) ... [2020-12-22 10:12:40,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:12:40,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:12:40,748 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.ufo.BOUNDED-14.pals+Problem12_label01.c[20544,20557] [2020-12-22 10:12:40,797 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.ufo.BOUNDED-14.pals+Problem12_label01.c[25856,25869] [2020-12-22 10:12:41,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:12:41,846 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:12:41,934 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.ufo.BOUNDED-14.pals+Problem12_label01.c[20544,20557] [2020-12-22 10:12:41,953 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.ufo.BOUNDED-14.pals+Problem12_label01.c[25856,25869] [2020-12-22 10:12:42,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:12:42,573 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:12:42,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:42 WrapperNode [2020-12-22 10:12:42,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:12:42,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:12:42,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:12:42,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:12:42,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:42" (1/1) ... [2020-12-22 10:12:42,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:42" (1/1) ... [2020-12-22 10:12:43,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:12:43,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:12:43,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:12:43,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:12:43,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:42" (1/1) ... [2020-12-22 10:12:43,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:42" (1/1) ... [2020-12-22 10:12:43,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:42" (1/1) ... [2020-12-22 10:12:43,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:42" (1/1) ... [2020-12-22 10:12:43,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:42" (1/1) ... [2020-12-22 10:12:43,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:42" (1/1) ... [2020-12-22 10:12:43,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:42" (1/1) ... [2020-12-22 10:12:43,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:12:43,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:12:43,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:12:43,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:12:43,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:42" (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 10:12:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:12:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:12:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:12:43,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:12:48,994 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:12:48,995 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:12:48,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:12:48 BoogieIcfgContainer [2020-12-22 10:12:48,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:12:49,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:12:49,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:12:49,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:12:49,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:12:40" (1/3) ... [2020-12-22 10:12:49,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a6f726e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:12:49, skipping insertion in model container [2020-12-22 10:12:49,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:42" (2/3) ... [2020-12-22 10:12:49,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a6f726e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:12:49, skipping insertion in model container [2020-12-22 10:12:49,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:12:48" (3/3) ... [2020-12-22 10:12:49,009 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label01.c [2020-12-22 10:12:49,015 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:12:49,030 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:12:49,050 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:12:49,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:12:49,085 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:12:49,085 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:12:49,085 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:12:49,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:12:49,086 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:12:49,086 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:12:49,086 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:12:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states. [2020-12-22 10:12:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:12:49,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:49,133 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 10:12:49,134 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:49,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:49,140 INFO L82 PathProgramCache]: Analyzing trace with hash 720070723, now seen corresponding path program 1 times [2020-12-22 10:12:49,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:49,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699013572] [2020-12-22 10:12:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:49,485 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 10:12:49,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699013572] [2020-12-22 10:12:49,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:49,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:12:49,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141843815] [2020-12-22 10:12:49,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:12:49,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:12:49,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:12:49,516 INFO L87 Difference]: Start difference. First operand 944 states. Second operand 2 states. [2020-12-22 10:12:49,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:49,606 INFO L93 Difference]: Finished difference Result 1832 states and 3464 transitions. [2020-12-22 10:12:49,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:12:49,608 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:12:49,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:49,634 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:12:49,634 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:12:49,643 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 10:12:49,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:12:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:12:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:12:49,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1653 transitions. [2020-12-22 10:12:49,784 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1653 transitions. Word has length 42 [2020-12-22 10:12:49,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:49,784 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1653 transitions. [2020-12-22 10:12:49,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:12:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1653 transitions. [2020-12-22 10:12:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:12:49,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:49,793 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 10:12:49,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:12:49,794 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:49,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:49,795 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:12:49,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:49,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510777941] [2020-12-22 10:12:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:49,975 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 10:12:49,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510777941] [2020-12-22 10:12:49,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:49,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:12:49,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854537589] [2020-12-22 10:12:49,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:12:49,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:49,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:12:49,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:12:49,981 INFO L87 Difference]: Start difference. First operand 878 states and 1653 transitions. Second operand 5 states. [2020-12-22 10:12:50,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:50,136 INFO L93 Difference]: Finished difference Result 950 states and 1765 transitions. [2020-12-22 10:12:50,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:12:50,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:12:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:50,145 INFO L225 Difference]: With dead ends: 950 [2020-12-22 10:12:50,146 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:12:50,148 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 10:12:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:12:50,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:12:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:12:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1603 transitions. [2020-12-22 10:12:50,189 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1603 transitions. Word has length 42 [2020-12-22 10:12:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:50,189 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1603 transitions. [2020-12-22 10:12:50,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:12:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1603 transitions. [2020-12-22 10:12:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 10:12:50,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:50,200 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] [2020-12-22 10:12:50,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:12:50,202 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:50,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash -364915275, now seen corresponding path program 1 times [2020-12-22 10:12:50,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:50,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137429631] [2020-12-22 10:12:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:50,465 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 10:12:50,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137429631] [2020-12-22 10:12:50,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:50,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:50,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918364406] [2020-12-22 10:12:50,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:12:50,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:50,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:12:50,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:12:50,476 INFO L87 Difference]: Start difference. First operand 878 states and 1603 transitions. Second operand 4 states. [2020-12-22 10:13:00,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:00,430 INFO L93 Difference]: Finished difference Result 3133 states and 5912 transitions. [2020-12-22 10:13:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:13:00,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 10:13:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:00,444 INFO L225 Difference]: With dead ends: 3133 [2020-12-22 10:13:00,445 INFO L226 Difference]: Without dead ends: 2380 [2020-12-22 10:13:00,446 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 10:13:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2020-12-22 10:13:00,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2380. [2020-12-22 10:13:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2380 states. [2020-12-22 10:13:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3717 transitions. [2020-12-22 10:13:00,504 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3717 transitions. Word has length 48 [2020-12-22 10:13:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:00,504 INFO L481 AbstractCegarLoop]: Abstraction has 2380 states and 3717 transitions. [2020-12-22 10:13:00,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:13:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3717 transitions. [2020-12-22 10:13:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:00,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:00,507 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 10:13:00,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:13:00,507 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:00,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:13:00,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:00,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111737300] [2020-12-22 10:13:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:00,630 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 10:13:00,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111737300] [2020-12-22 10:13:00,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:00,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:00,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199371615] [2020-12-22 10:13:00,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:00,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:00,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:00,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:00,634 INFO L87 Difference]: Start difference. First operand 2380 states and 3717 transitions. Second operand 3 states. [2020-12-22 10:13:00,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:00,682 INFO L93 Difference]: Finished difference Result 2510 states and 3923 transitions. [2020-12-22 10:13:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:00,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:00,696 INFO L225 Difference]: With dead ends: 2510 [2020-12-22 10:13:00,697 INFO L226 Difference]: Without dead ends: 2442 [2020-12-22 10:13:00,698 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 10:13:00,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2020-12-22 10:13:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2020-12-22 10:13:00,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2440 states. [2020-12-22 10:13:00,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3813 transitions. [2020-12-22 10:13:00,766 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3813 transitions. Word has length 91 [2020-12-22 10:13:00,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:00,768 INFO L481 AbstractCegarLoop]: Abstraction has 2440 states and 3813 transitions. [2020-12-22 10:13:00,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:00,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3813 transitions. [2020-12-22 10:13:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:00,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:00,771 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 10:13:00,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:13:00,771 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:00,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:00,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:13:00,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:00,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168067282] [2020-12-22 10:13:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:00,892 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 10:13:00,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168067282] [2020-12-22 10:13:00,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:00,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:00,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816082597] [2020-12-22 10:13:00,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:00,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:00,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:00,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:00,895 INFO L87 Difference]: Start difference. First operand 2440 states and 3813 transitions. Second operand 3 states. [2020-12-22 10:13:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:00,942 INFO L93 Difference]: Finished difference Result 2684 states and 4201 transitions. [2020-12-22 10:13:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:00,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:00,957 INFO L225 Difference]: With dead ends: 2684 [2020-12-22 10:13:00,957 INFO L226 Difference]: Without dead ends: 2556 [2020-12-22 10:13:00,958 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 10:13:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2020-12-22 10:13:01,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2554. [2020-12-22 10:13:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2554 states. [2020-12-22 10:13:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 3994 transitions. [2020-12-22 10:13:01,024 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 3994 transitions. Word has length 91 [2020-12-22 10:13:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:01,024 INFO L481 AbstractCegarLoop]: Abstraction has 2554 states and 3994 transitions. [2020-12-22 10:13:01,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 3994 transitions. [2020-12-22 10:13:01,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:01,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:01,026 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 10:13:01,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:13:01,026 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:01,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:01,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:13:01,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:01,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434692818] [2020-12-22 10:13:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:01,111 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 10:13:01,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434692818] [2020-12-22 10:13:01,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:01,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:01,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458230034] [2020-12-22 10:13:01,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:01,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:01,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:01,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:01,113 INFO L87 Difference]: Start difference. First operand 2554 states and 3994 transitions. Second operand 3 states. [2020-12-22 10:13:01,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:01,172 INFO L93 Difference]: Finished difference Result 3014 states and 4724 transitions. [2020-12-22 10:13:01,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:01,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:01,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:01,188 INFO L225 Difference]: With dead ends: 3014 [2020-12-22 10:13:01,189 INFO L226 Difference]: Without dead ends: 2772 [2020-12-22 10:13:01,190 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 10:13:01,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2020-12-22 10:13:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2770. [2020-12-22 10:13:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-12-22 10:13:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 4334 transitions. [2020-12-22 10:13:01,269 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 4334 transitions. Word has length 91 [2020-12-22 10:13:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:01,269 INFO L481 AbstractCegarLoop]: Abstraction has 2770 states and 4334 transitions. [2020-12-22 10:13:01,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 4334 transitions. [2020-12-22 10:13:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:01,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:01,271 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 10:13:01,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:13:01,271 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:13:01,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:01,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045853991] [2020-12-22 10:13:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:01,351 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 10:13:01,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045853991] [2020-12-22 10:13:01,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:01,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:01,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498055261] [2020-12-22 10:13:01,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:01,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:01,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:01,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:01,354 INFO L87 Difference]: Start difference. First operand 2770 states and 4334 transitions. Second operand 3 states. [2020-12-22 10:13:01,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:01,428 INFO L93 Difference]: Finished difference Result 3638 states and 5704 transitions. [2020-12-22 10:13:01,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:01,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:01,447 INFO L225 Difference]: With dead ends: 3638 [2020-12-22 10:13:01,447 INFO L226 Difference]: Without dead ends: 3180 [2020-12-22 10:13:01,449 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 10:13:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2020-12-22 10:13:01,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3178. [2020-12-22 10:13:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-12-22 10:13:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4970 transitions. [2020-12-22 10:13:01,564 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4970 transitions. Word has length 91 [2020-12-22 10:13:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:01,564 INFO L481 AbstractCegarLoop]: Abstraction has 3178 states and 4970 transitions. [2020-12-22 10:13:01,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4970 transitions. [2020-12-22 10:13:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:01,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:01,566 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 10:13:01,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:13:01,566 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:01,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:13:01,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:01,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460388010] [2020-12-22 10:13:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:01,644 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 10:13:01,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460388010] [2020-12-22 10:13:01,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:01,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:01,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621355783] [2020-12-22 10:13:01,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:01,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:01,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:01,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:01,647 INFO L87 Difference]: Start difference. First operand 3178 states and 4970 transitions. Second operand 3 states. [2020-12-22 10:13:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:01,746 INFO L93 Difference]: Finished difference Result 4814 states and 7532 transitions. [2020-12-22 10:13:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:01,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:01,768 INFO L225 Difference]: With dead ends: 4814 [2020-12-22 10:13:01,768 INFO L226 Difference]: Without dead ends: 3948 [2020-12-22 10:13:01,772 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 10:13:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2020-12-22 10:13:01,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3946. [2020-12-22 10:13:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3946 states. [2020-12-22 10:13:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 6154 transitions. [2020-12-22 10:13:01,943 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 6154 transitions. Word has length 91 [2020-12-22 10:13:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:01,943 INFO L481 AbstractCegarLoop]: Abstraction has 3946 states and 6154 transitions. [2020-12-22 10:13:01,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 6154 transitions. [2020-12-22 10:13:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:01,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:01,945 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 10:13:01,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:13:01,945 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:01,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:01,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:13:01,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:01,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693149493] [2020-12-22 10:13:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:02,128 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 10:13:02,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693149493] [2020-12-22 10:13:02,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:02,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:02,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177444624] [2020-12-22 10:13:02,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:02,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:02,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:02,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:02,131 INFO L87 Difference]: Start difference. First operand 3946 states and 6154 transitions. Second operand 9 states. [2020-12-22 10:13:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:03,646 INFO L93 Difference]: Finished difference Result 26822 states and 41784 transitions. [2020-12-22 10:13:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:13:03,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:13:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:03,749 INFO L225 Difference]: With dead ends: 26822 [2020-12-22 10:13:03,750 INFO L226 Difference]: Without dead ends: 25188 [2020-12-22 10:13:03,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:13:03,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25188 states. [2020-12-22 10:13:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25188 to 5578. [2020-12-22 10:13:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5578 states. [2020-12-22 10:13:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 8634 transitions. [2020-12-22 10:13:04,421 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 8634 transitions. Word has length 91 [2020-12-22 10:13:04,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:04,421 INFO L481 AbstractCegarLoop]: Abstraction has 5578 states and 8634 transitions. [2020-12-22 10:13:04,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 8634 transitions. [2020-12-22 10:13:04,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:04,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:04,423 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 10:13:04,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:13:04,423 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:04,424 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:13:04,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:04,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223604770] [2020-12-22 10:13:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:04,512 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 10:13:04,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223604770] [2020-12-22 10:13:04,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:04,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:04,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927663939] [2020-12-22 10:13:04,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:04,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:04,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:04,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:04,518 INFO L87 Difference]: Start difference. First operand 5578 states and 8634 transitions. Second operand 3 states. [2020-12-22 10:13:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:04,862 INFO L93 Difference]: Finished difference Result 10400 states and 16046 transitions. [2020-12-22 10:13:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:04,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:04,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:04,886 INFO L225 Difference]: With dead ends: 10400 [2020-12-22 10:13:04,886 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:13:04,893 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 10:13:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:13:05,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:13:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:13:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10972 transitions. [2020-12-22 10:13:05,284 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10972 transitions. Word has length 93 [2020-12-22 10:13:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:05,284 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10972 transitions. [2020-12-22 10:13:05,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:05,285 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10972 transitions. [2020-12-22 10:13:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:05,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:05,289 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 10:13:05,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:13:05,290 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:05,290 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:13:05,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:05,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109254921] [2020-12-22 10:13:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:05,614 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 10:13:05,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109254921] [2020-12-22 10:13:05,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:05,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:05,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921906732] [2020-12-22 10:13:05,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:05,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:05,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:05,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:05,618 INFO L87 Difference]: Start difference. First operand 7132 states and 10972 transitions. Second operand 9 states. [2020-12-22 10:13:06,049 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 10:13:06,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:06,583 INFO L93 Difference]: Finished difference Result 11952 states and 18334 transitions. [2020-12-22 10:13:06,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:06,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:13:06,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:06,604 INFO L225 Difference]: With dead ends: 11952 [2020-12-22 10:13:06,604 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:13:06,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:13:06,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:13:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:13:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:13:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10924 transitions. [2020-12-22 10:13:07,046 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10924 transitions. Word has length 93 [2020-12-22 10:13:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:07,046 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10924 transitions. [2020-12-22 10:13:07,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10924 transitions. [2020-12-22 10:13:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:07,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:07,048 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 10:13:07,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:13:07,048 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:13:07,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:07,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637520588] [2020-12-22 10:13:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:07,125 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 10:13:07,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637520588] [2020-12-22 10:13:07,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:07,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:07,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635738839] [2020-12-22 10:13:07,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:07,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:07,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:07,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:07,128 INFO L87 Difference]: Start difference. First operand 7132 states and 10924 transitions. Second operand 3 states. [2020-12-22 10:13:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:07,801 INFO L93 Difference]: Finished difference Result 16192 states and 24590 transitions. [2020-12-22 10:13:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:07,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:07,827 INFO L225 Difference]: With dead ends: 16192 [2020-12-22 10:13:07,827 INFO L226 Difference]: Without dead ends: 11374 [2020-12-22 10:13:07,835 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 10:13:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11374 states. [2020-12-22 10:13:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11374 to 11372. [2020-12-22 10:13:08,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11372 states. [2020-12-22 10:13:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 17180 transitions. [2020-12-22 10:13:08,495 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 17180 transitions. Word has length 93 [2020-12-22 10:13:08,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:08,496 INFO L481 AbstractCegarLoop]: Abstraction has 11372 states and 17180 transitions. [2020-12-22 10:13:08,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:08,496 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 17180 transitions. [2020-12-22 10:13:08,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:08,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:08,497 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 10:13:08,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:13:08,498 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:08,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:13:08,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:08,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253454482] [2020-12-22 10:13:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:08,571 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 10:13:08,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253454482] [2020-12-22 10:13:08,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:08,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:08,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528846828] [2020-12-22 10:13:08,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:08,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:08,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:08,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:08,574 INFO L87 Difference]: Start difference. First operand 11372 states and 17180 transitions. Second operand 3 states. [2020-12-22 10:13:09,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:09,748 INFO L93 Difference]: Finished difference Result 28336 states and 42398 transitions. [2020-12-22 10:13:09,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:09,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:09,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:09,794 INFO L225 Difference]: With dead ends: 28336 [2020-12-22 10:13:09,794 INFO L226 Difference]: Without dead ends: 19278 [2020-12-22 10:13:09,811 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 10:13:09,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2020-12-22 10:13:10,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 19276. [2020-12-22 10:13:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:13:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28636 transitions. [2020-12-22 10:13:10,854 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28636 transitions. Word has length 93 [2020-12-22 10:13:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:10,854 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28636 transitions. [2020-12-22 10:13:10,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28636 transitions. [2020-12-22 10:13:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:10,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:10,856 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 10:13:10,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:13:10,856 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:10,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:10,857 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:13:10,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:10,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170654735] [2020-12-22 10:13:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:10,952 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 10:13:10,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170654735] [2020-12-22 10:13:10,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:10,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:10,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511249563] [2020-12-22 10:13:10,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:13:10,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:10,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:13:10,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:13:10,955 INFO L87 Difference]: Start difference. First operand 19276 states and 28636 transitions. Second operand 6 states. [2020-12-22 10:13:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:12,557 INFO L93 Difference]: Finished difference Result 36238 states and 53661 transitions. [2020-12-22 10:13:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:13:12,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:13:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:12,603 INFO L225 Difference]: With dead ends: 36238 [2020-12-22 10:13:12,603 INFO L226 Difference]: Without dead ends: 19276 [2020-12-22 10:13:12,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19276 states. [2020-12-22 10:13:13,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19276 to 19276. [2020-12-22 10:13:13,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:13:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28380 transitions. [2020-12-22 10:13:13,850 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28380 transitions. Word has length 94 [2020-12-22 10:13:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:13,855 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28380 transitions. [2020-12-22 10:13:13,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:13:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28380 transitions. [2020-12-22 10:13:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:13,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:13,857 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 10:13:13,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:13:13,858 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:13,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:13:13,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:13,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407977504] [2020-12-22 10:13:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:13,964 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 10:13:13,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407977504] [2020-12-22 10:13:13,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:13,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:13,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627757623] [2020-12-22 10:13:13,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:13:13,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:13,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:13:13,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:13:13,966 INFO L87 Difference]: Start difference. First operand 19276 states and 28380 transitions. Second operand 6 states. [2020-12-22 10:13:15,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:15,069 INFO L93 Difference]: Finished difference Result 36238 states and 53149 transitions. [2020-12-22 10:13:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:13:15,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:13:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:15,106 INFO L225 Difference]: With dead ends: 36238 [2020-12-22 10:13:15,106 INFO L226 Difference]: Without dead ends: 19276 [2020-12-22 10:13:15,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19276 states. [2020-12-22 10:13:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19276 to 19276. [2020-12-22 10:13:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:13:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28188 transitions. [2020-12-22 10:13:16,395 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28188 transitions. Word has length 94 [2020-12-22 10:13:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:16,396 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28188 transitions. [2020-12-22 10:13:16,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:13:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28188 transitions. [2020-12-22 10:13:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:16,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:16,397 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 10:13:16,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:13:16,398 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:16,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:16,398 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:13:16,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:16,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41435086] [2020-12-22 10:13:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:16,516 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 10:13:16,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41435086] [2020-12-22 10:13:16,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:16,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:13:16,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542164783] [2020-12-22 10:13:16,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:13:16,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:16,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:13:16,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:13:16,521 INFO L87 Difference]: Start difference. First operand 19276 states and 28188 transitions. Second operand 8 states. [2020-12-22 10:13:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:19,153 INFO L93 Difference]: Finished difference Result 33775 states and 48838 transitions. [2020-12-22 10:13:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:13:19,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:13:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:19,212 INFO L225 Difference]: With dead ends: 33775 [2020-12-22 10:13:19,212 INFO L226 Difference]: Without dead ends: 33773 [2020-12-22 10:13:19,225 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 10:13:19,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33773 states. [2020-12-22 10:13:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33773 to 20044. [2020-12-22 10:13:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20044 states. [2020-12-22 10:13:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20044 states to 20044 states and 28892 transitions. [2020-12-22 10:13:20,941 INFO L78 Accepts]: Start accepts. Automaton has 20044 states and 28892 transitions. Word has length 94 [2020-12-22 10:13:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:20,942 INFO L481 AbstractCegarLoop]: Abstraction has 20044 states and 28892 transitions. [2020-12-22 10:13:20,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:13:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 20044 states and 28892 transitions. [2020-12-22 10:13:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 10:13:20,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:20,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:13:20,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:13:20,947 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:20,947 INFO L82 PathProgramCache]: Analyzing trace with hash 778341306, now seen corresponding path program 1 times [2020-12-22 10:13:20,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:20,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146429199] [2020-12-22 10:13:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:21,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146429199] [2020-12-22 10:13:21,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:21,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:21,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411316657] [2020-12-22 10:13:21,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:13:21,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:21,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:13:21,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:13:21,097 INFO L87 Difference]: Start difference. First operand 20044 states and 28892 transitions. Second operand 4 states. [2020-12-22 10:13:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:29,241 INFO L93 Difference]: Finished difference Result 23840 states and 35256 transitions. [2020-12-22 10:13:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:13:29,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 10:13:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:29,265 INFO L225 Difference]: With dead ends: 23840 [2020-12-22 10:13:29,265 INFO L226 Difference]: Without dead ends: 21548 [2020-12-22 10:13:29,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:13:29,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21548 states. [2020-12-22 10:13:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21548 to 21546. [2020-12-22 10:13:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21546 states. [2020-12-22 10:13:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21546 states to 21546 states and 30480 transitions. [2020-12-22 10:13:30,655 INFO L78 Accepts]: Start accepts. Automaton has 21546 states and 30480 transitions. Word has length 119 [2020-12-22 10:13:30,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:30,655 INFO L481 AbstractCegarLoop]: Abstraction has 21546 states and 30480 transitions. [2020-12-22 10:13:30,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:13:30,655 INFO L276 IsEmpty]: Start isEmpty. Operand 21546 states and 30480 transitions. [2020-12-22 10:13:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:13:30,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:30,675 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] [2020-12-22 10:13:30,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:13:30,676 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:30,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:30,676 INFO L82 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2020-12-22 10:13:30,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:30,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13213729] [2020-12-22 10:13:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:13:30,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13213729] [2020-12-22 10:13:30,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:30,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:30,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413707781] [2020-12-22 10:13:30,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:30,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:30,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:30,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:30,858 INFO L87 Difference]: Start difference. First operand 21546 states and 30480 transitions. Second operand 9 states. [2020-12-22 10:13:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:38,633 INFO L93 Difference]: Finished difference Result 149114 states and 212216 transitions. [2020-12-22 10:13:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:38,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:13:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:38,840 INFO L225 Difference]: With dead ends: 149114 [2020-12-22 10:13:38,841 INFO L226 Difference]: Without dead ends: 131384 [2020-12-22 10:13:38,883 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 10:13:39,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131384 states. [2020-12-22 10:13:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131384 to 39274. [2020-12-22 10:13:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39274 states. [2020-12-22 10:13:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39274 states to 39274 states and 55568 transitions. [2020-12-22 10:13:42,781 INFO L78 Accepts]: Start accepts. Automaton has 39274 states and 55568 transitions. Word has length 130 [2020-12-22 10:13:42,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:42,781 INFO L481 AbstractCegarLoop]: Abstraction has 39274 states and 55568 transitions. [2020-12-22 10:13:42,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 39274 states and 55568 transitions. [2020-12-22 10:13:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:13:42,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:42,797 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] [2020-12-22 10:13:42,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:13:42,797 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:42,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:42,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2020-12-22 10:13:42,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:42,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690667304] [2020-12-22 10:13:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:13:43,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690667304] [2020-12-22 10:13:43,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:43,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:43,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375728170] [2020-12-22 10:13:43,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:43,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:43,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:43,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:43,133 INFO L87 Difference]: Start difference. First operand 39274 states and 55568 transitions. Second operand 9 states. [2020-12-22 10:13:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:53,199 INFO L93 Difference]: Finished difference Result 166842 states and 237304 transitions. [2020-12-22 10:13:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:53,199 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:13:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:53,370 INFO L225 Difference]: With dead ends: 166842 [2020-12-22 10:13:53,370 INFO L226 Difference]: Without dead ends: 149112 [2020-12-22 10:13:53,399 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 10:13:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149112 states. [2020-12-22 10:13:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149112 to 65898. [2020-12-22 10:13:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65898 states. [2020-12-22 10:13:59,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65898 states to 65898 states and 93040 transitions. [2020-12-22 10:13:59,475 INFO L78 Accepts]: Start accepts. Automaton has 65898 states and 93040 transitions. Word has length 130 [2020-12-22 10:13:59,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:59,475 INFO L481 AbstractCegarLoop]: Abstraction has 65898 states and 93040 transitions. [2020-12-22 10:13:59,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:59,475 INFO L276 IsEmpty]: Start isEmpty. Operand 65898 states and 93040 transitions. [2020-12-22 10:13:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:13:59,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:59,495 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, 1] [2020-12-22 10:13:59,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:13:59,495 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:59,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2020-12-22 10:13:59,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:59,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323127037] [2020-12-22 10:13:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:59,712 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 10:13:59,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323127037] [2020-12-22 10:13:59,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:59,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:59,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220442555] [2020-12-22 10:13:59,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:59,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:59,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:59,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:59,715 INFO L87 Difference]: Start difference. First operand 65898 states and 93040 transitions. Second operand 9 states. [2020-12-22 10:14:12,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:12,065 INFO L93 Difference]: Finished difference Result 184570 states and 262392 transitions. [2020-12-22 10:14:12,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:12,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:12,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:12,283 INFO L225 Difference]: With dead ends: 184570 [2020-12-22 10:14:12,284 INFO L226 Difference]: Without dead ends: 166840 [2020-12-22 10:14:12,327 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 10:14:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166840 states. [2020-12-22 10:14:19,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166840 to 83626. [2020-12-22 10:14:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83626 states. [2020-12-22 10:14:20,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83626 states to 83626 states and 118128 transitions. [2020-12-22 10:14:20,004 INFO L78 Accepts]: Start accepts. Automaton has 83626 states and 118128 transitions. Word has length 130 [2020-12-22 10:14:20,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:20,005 INFO L481 AbstractCegarLoop]: Abstraction has 83626 states and 118128 transitions. [2020-12-22 10:14:20,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:20,005 INFO L276 IsEmpty]: Start isEmpty. Operand 83626 states and 118128 transitions. [2020-12-22 10:14:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:20,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:20,019 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, 1] [2020-12-22 10:14:20,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:14:20,019 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:20,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2020-12-22 10:14:20,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:20,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673435143] [2020-12-22 10:14:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:14:20,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673435143] [2020-12-22 10:14:20,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:20,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:20,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115456914] [2020-12-22 10:14:20,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:20,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:20,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:20,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:20,190 INFO L87 Difference]: Start difference. First operand 83626 states and 118128 transitions. Second operand 9 states. [2020-12-22 10:14:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:34,657 INFO L93 Difference]: Finished difference Result 202298 states and 287480 transitions. [2020-12-22 10:14:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:34,657 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:35,102 INFO L225 Difference]: With dead ends: 202298 [2020-12-22 10:14:35,103 INFO L226 Difference]: Without dead ends: 184568 [2020-12-22 10:14:35,166 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 10:14:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184568 states. [2020-12-22 10:14:44,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184568 to 101354. [2020-12-22 10:14:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101354 states. [2020-12-22 10:14:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101354 states to 101354 states and 143216 transitions. [2020-12-22 10:14:44,693 INFO L78 Accepts]: Start accepts. Automaton has 101354 states and 143216 transitions. Word has length 130 [2020-12-22 10:14:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:44,694 INFO L481 AbstractCegarLoop]: Abstraction has 101354 states and 143216 transitions. [2020-12-22 10:14:44,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:44,694 INFO L276 IsEmpty]: Start isEmpty. Operand 101354 states and 143216 transitions. [2020-12-22 10:14:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:44,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:44,708 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, 1] [2020-12-22 10:14:44,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:14:44,708 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash 162359075, now seen corresponding path program 1 times [2020-12-22 10:14:44,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:44,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281540739] [2020-12-22 10:14:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:14:44,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281540739] [2020-12-22 10:14:44,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:44,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:44,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131649794] [2020-12-22 10:14:44,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:44,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:44,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:44,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:44,892 INFO L87 Difference]: Start difference. First operand 101354 states and 143216 transitions. Second operand 9 states. [2020-12-22 10:15:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:02,725 INFO L93 Difference]: Finished difference Result 220026 states and 312568 transitions. [2020-12-22 10:15:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:02,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:03,184 INFO L225 Difference]: With dead ends: 220026 [2020-12-22 10:15:03,184 INFO L226 Difference]: Without dead ends: 202296 [2020-12-22 10:15:03,249 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 10:15:03,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202296 states. [2020-12-22 10:15:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202296 to 119082. [2020-12-22 10:15:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119082 states. [2020-12-22 10:15:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119082 states to 119082 states and 168304 transitions. [2020-12-22 10:15:14,990 INFO L78 Accepts]: Start accepts. Automaton has 119082 states and 168304 transitions. Word has length 130 [2020-12-22 10:15:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:14,990 INFO L481 AbstractCegarLoop]: Abstraction has 119082 states and 168304 transitions. [2020-12-22 10:15:14,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 119082 states and 168304 transitions. [2020-12-22 10:15:15,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:15,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:15,012 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, 1] [2020-12-22 10:15:15,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:15:15,013 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:15,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:15,013 INFO L82 PathProgramCache]: Analyzing trace with hash -403461309, now seen corresponding path program 1 times [2020-12-22 10:15:15,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:15,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096355054] [2020-12-22 10:15:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:15:15,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096355054] [2020-12-22 10:15:15,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:15,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:15,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413807798] [2020-12-22 10:15:15,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:15,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:15,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:15,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:15,417 INFO L87 Difference]: Start difference. First operand 119082 states and 168304 transitions. Second operand 9 states. [2020-12-22 10:15:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:36,358 INFO L93 Difference]: Finished difference Result 237754 states and 337656 transitions. [2020-12-22 10:15:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:36,358 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:36,904 INFO L225 Difference]: With dead ends: 237754 [2020-12-22 10:15:36,904 INFO L226 Difference]: Without dead ends: 220024 [2020-12-22 10:15:36,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:37,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220024 states. [2020-12-22 10:15:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220024 to 136810. [2020-12-22 10:15:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136810 states. [2020-12-22 10:15:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136810 states to 136810 states and 193392 transitions. [2020-12-22 10:15:51,487 INFO L78 Accepts]: Start accepts. Automaton has 136810 states and 193392 transitions. Word has length 130 [2020-12-22 10:15:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:51,487 INFO L481 AbstractCegarLoop]: Abstraction has 136810 states and 193392 transitions. [2020-12-22 10:15:51,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:51,487 INFO L276 IsEmpty]: Start isEmpty. Operand 136810 states and 193392 transitions. [2020-12-22 10:15:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:51,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:51,508 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, 1] [2020-12-22 10:15:51,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:15:51,509 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash -214245533, now seen corresponding path program 1 times [2020-12-22 10:15:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:51,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233519754] [2020-12-22 10:15:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:15:51,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233519754] [2020-12-22 10:15:51,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:51,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:51,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052613484] [2020-12-22 10:15:51,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:51,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:51,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:51,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:51,675 INFO L87 Difference]: Start difference. First operand 136810 states and 193392 transitions. Second operand 9 states.