/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.6.ufo.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:06:47,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:06:47,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:06:47,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:06:47,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:06:47,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:06:47,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:06:47,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:06:47,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:06:47,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:06:47,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:06:47,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:06:47,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:06:47,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:06:47,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:06:47,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:06:47,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:06:47,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:06:47,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:06:47,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:06:47,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:06:47,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:06:47,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:06:47,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:06:47,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:06:47,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:06:47,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:06:47,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:06:47,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:06:47,417 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:06:47,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:06:47,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:06:47,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:06:47,422 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:06:47,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:06:47,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:06:47,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:06:47,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:06:47,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:06:47,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:06:47,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:06:47,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:06:47,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:06:47,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:06:47,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:06:47,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:06:47,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:06:47,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:06:47,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:06:47,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:06:47,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:06:47,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:06:47,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:06:47,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:06:47,428 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:06:47,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:06:47,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:06:47,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:06:47,897 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:06:47,898 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:06:47,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:06:47,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51fee0340/5bced41610634a94a1551399ff5d4c3d/FLAGb26702755 [2020-12-22 10:06:48,982 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:06:48,982 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:06:49,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51fee0340/5bced41610634a94a1551399ff5d4c3d/FLAGb26702755 [2020-12-22 10:06:49,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51fee0340/5bced41610634a94a1551399ff5d4c3d [2020-12-22 10:06:49,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:06:49,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:06:49,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:06:49,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:06:49,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:06:49,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:06:49" (1/1) ... [2020-12-22 10:06:49,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f541eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:49, skipping insertion in model container [2020-12-22 10:06:49,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:06:49" (1/1) ... [2020-12-22 10:06:49,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:06:49,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:06:49,968 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.6.ufo.UNBOUNDED.pals+Problem12_label05.c[15614,15627] [2020-12-22 10:06:50,061 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.6.ufo.UNBOUNDED.pals+Problem12_label05.c[22307,22320] [2020-12-22 10:06:50,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:06:50,917 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:06:50,987 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.6.ufo.UNBOUNDED.pals+Problem12_label05.c[15614,15627] [2020-12-22 10:06:51,002 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.6.ufo.UNBOUNDED.pals+Problem12_label05.c[22307,22320] [2020-12-22 10:06:51,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:06:51,626 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:06:51,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:51 WrapperNode [2020-12-22 10:06:51,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:06:51,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:06:51,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:06:51,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:06:51,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:51" (1/1) ... [2020-12-22 10:06:51,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:51" (1/1) ... [2020-12-22 10:06:52,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:06:52,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:06:52,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:06:52,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:06:52,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:51" (1/1) ... [2020-12-22 10:06:52,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:51" (1/1) ... [2020-12-22 10:06:52,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:51" (1/1) ... [2020-12-22 10:06:52,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:51" (1/1) ... [2020-12-22 10:06:52,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:51" (1/1) ... [2020-12-22 10:06:52,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:51" (1/1) ... [2020-12-22 10:06:52,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:51" (1/1) ... [2020-12-22 10:06:52,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:06:52,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:06:52,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:06:52,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:06:52,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:51" (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 10:06:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:06:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:06:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:06:53,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:06:57,947 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:06:57,948 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:06:57,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:06:57 BoogieIcfgContainer [2020-12-22 10:06:57,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:06:57,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:06:57,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:06:57,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:06:57,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:06:49" (1/3) ... [2020-12-22 10:06:57,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af68236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:06:57, skipping insertion in model container [2020-12-22 10:06:57,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:51" (2/3) ... [2020-12-22 10:06:57,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af68236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:06:57, skipping insertion in model container [2020-12-22 10:06:57,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:06:57" (3/3) ... [2020-12-22 10:06:57,963 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:06:57,971 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:06:57,978 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:06:58,001 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:06:58,041 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:06:58,041 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:06:58,041 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:06:58,041 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:06:58,041 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:06:58,042 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:06:58,042 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:06:58,042 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:06:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states. [2020-12-22 10:06:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:06:58,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:58,141 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] [2020-12-22 10:06:58,141 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:58,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:58,148 INFO L82 PathProgramCache]: Analyzing trace with hash -321533933, now seen corresponding path program 1 times [2020-12-22 10:06:58,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:58,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337197258] [2020-12-22 10:06:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:58,532 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 10:06:58,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337197258] [2020-12-22 10:06:58,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:58,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:06:58,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579200141] [2020-12-22 10:06:58,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:06:58,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:58,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:06:58,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:06:58,557 INFO L87 Difference]: Start difference. First operand 927 states. Second operand 2 states. [2020-12-22 10:06:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:58,713 INFO L93 Difference]: Finished difference Result 1806 states and 3420 transitions. [2020-12-22 10:06:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:06:58,720 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:06:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:58,765 INFO L225 Difference]: With dead ends: 1806 [2020-12-22 10:06:58,765 INFO L226 Difference]: Without dead ends: 861 [2020-12-22 10:06:58,782 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 10:06:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2020-12-22 10:06:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2020-12-22 10:06:58,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 861 states. [2020-12-22 10:06:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1622 transitions. [2020-12-22 10:06:58,919 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1622 transitions. Word has length 38 [2020-12-22 10:06:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:58,919 INFO L481 AbstractCegarLoop]: Abstraction has 861 states and 1622 transitions. [2020-12-22 10:06:58,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:06:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1622 transitions. [2020-12-22 10:06:58,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:06:58,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:58,928 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] [2020-12-22 10:06:58,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:06:58,928 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:58,932 INFO L82 PathProgramCache]: Analyzing trace with hash -46774319, now seen corresponding path program 1 times [2020-12-22 10:06:58,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:58,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723153908] [2020-12-22 10:06:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:59,143 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 10:06:59,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723153908] [2020-12-22 10:06:59,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:59,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:06:59,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050632373] [2020-12-22 10:06:59,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:06:59,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:59,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:06:59,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:06:59,151 INFO L87 Difference]: Start difference. First operand 861 states and 1622 transitions. Second operand 5 states. [2020-12-22 10:06:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:59,286 INFO L93 Difference]: Finished difference Result 926 states and 1723 transitions. [2020-12-22 10:06:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:06:59,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:06:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:59,295 INFO L225 Difference]: With dead ends: 926 [2020-12-22 10:06:59,295 INFO L226 Difference]: Without dead ends: 861 [2020-12-22 10:06:59,297 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 10:06:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2020-12-22 10:06:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2020-12-22 10:06:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 861 states. [2020-12-22 10:06:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1582 transitions. [2020-12-22 10:06:59,320 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1582 transitions. Word has length 38 [2020-12-22 10:06:59,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:59,320 INFO L481 AbstractCegarLoop]: Abstraction has 861 states and 1582 transitions. [2020-12-22 10:06:59,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:06:59,321 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1582 transitions. [2020-12-22 10:06:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 10:06:59,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:59,327 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] [2020-12-22 10:06:59,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:06:59,328 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:59,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1656222085, now seen corresponding path program 1 times [2020-12-22 10:06:59,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:59,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988090243] [2020-12-22 10:06:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:59,492 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 10:06:59,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988090243] [2020-12-22 10:06:59,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:59,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:06:59,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436326001] [2020-12-22 10:06:59,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:59,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:59,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:59,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:59,495 INFO L87 Difference]: Start difference. First operand 861 states and 1582 transitions. Second operand 3 states. [2020-12-22 10:07:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:04,730 INFO L93 Difference]: Finished difference Result 2365 states and 4455 transitions. [2020-12-22 10:07:04,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:04,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 10:07:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:04,742 INFO L225 Difference]: With dead ends: 2365 [2020-12-22 10:07:04,742 INFO L226 Difference]: Without dead ends: 1612 [2020-12-22 10:07:04,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:07:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2020-12-22 10:07:04,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1612. [2020-12-22 10:07:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1612 states. [2020-12-22 10:07:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2561 transitions. [2020-12-22 10:07:04,789 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2561 transitions. Word has length 60 [2020-12-22 10:07:04,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:04,790 INFO L481 AbstractCegarLoop]: Abstraction has 1612 states and 2561 transitions. [2020-12-22 10:07:04,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2561 transitions. [2020-12-22 10:07:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:04,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:04,791 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] [2020-12-22 10:07:04,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:07:04,794 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:04,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:04,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1531755293, now seen corresponding path program 1 times [2020-12-22 10:07:04,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:04,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542331419] [2020-12-22 10:07:04,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:04,886 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 10:07:04,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542331419] [2020-12-22 10:07:04,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:04,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:04,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821658693] [2020-12-22 10:07:04,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:04,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:04,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:04,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:04,889 INFO L87 Difference]: Start difference. First operand 1612 states and 2561 transitions. Second operand 3 states. [2020-12-22 10:07:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:04,934 INFO L93 Difference]: Finished difference Result 1728 states and 2745 transitions. [2020-12-22 10:07:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:04,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:04,946 INFO L225 Difference]: With dead ends: 1728 [2020-12-22 10:07:04,946 INFO L226 Difference]: Without dead ends: 1667 [2020-12-22 10:07:04,947 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 10:07:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2020-12-22 10:07:04,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1665. [2020-12-22 10:07:04,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1665 states. [2020-12-22 10:07:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2646 transitions. [2020-12-22 10:07:04,999 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2646 transitions. Word has length 77 [2020-12-22 10:07:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:05,000 INFO L481 AbstractCegarLoop]: Abstraction has 1665 states and 2646 transitions. [2020-12-22 10:07:05,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:05,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2646 transitions. [2020-12-22 10:07:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:05,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:05,002 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] [2020-12-22 10:07:05,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:07:05,002 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:05,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:05,003 INFO L82 PathProgramCache]: Analyzing trace with hash 786172563, now seen corresponding path program 1 times [2020-12-22 10:07:05,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:05,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713141417] [2020-12-22 10:07:05,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:05,084 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 10:07:05,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713141417] [2020-12-22 10:07:05,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:05,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:05,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347868962] [2020-12-22 10:07:05,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:05,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:05,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:05,088 INFO L87 Difference]: Start difference. First operand 1665 states and 2646 transitions. Second operand 3 states. [2020-12-22 10:07:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:05,136 INFO L93 Difference]: Finished difference Result 1881 states and 2990 transitions. [2020-12-22 10:07:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:05,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:05,147 INFO L225 Difference]: With dead ends: 1881 [2020-12-22 10:07:05,147 INFO L226 Difference]: Without dead ends: 1767 [2020-12-22 10:07:05,149 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 10:07:05,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2020-12-22 10:07:05,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1765. [2020-12-22 10:07:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1765 states. [2020-12-22 10:07:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 2805 transitions. [2020-12-22 10:07:05,208 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 2805 transitions. Word has length 77 [2020-12-22 10:07:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:05,208 INFO L481 AbstractCegarLoop]: Abstraction has 1765 states and 2805 transitions. [2020-12-22 10:07:05,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 2805 transitions. [2020-12-22 10:07:05,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:05,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:05,210 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] [2020-12-22 10:07:05,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:07:05,210 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:05,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1153858295, now seen corresponding path program 1 times [2020-12-22 10:07:05,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:05,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427862089] [2020-12-22 10:07:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:05,283 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 10:07:05,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427862089] [2020-12-22 10:07:05,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:05,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:05,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973877099] [2020-12-22 10:07:05,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:05,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:05,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:05,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:05,287 INFO L87 Difference]: Start difference. First operand 1765 states and 2805 transitions. Second operand 3 states. [2020-12-22 10:07:05,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:05,340 INFO L93 Difference]: Finished difference Result 2169 states and 3447 transitions. [2020-12-22 10:07:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:05,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:05,353 INFO L225 Difference]: With dead ends: 2169 [2020-12-22 10:07:05,353 INFO L226 Difference]: Without dead ends: 1955 [2020-12-22 10:07:05,354 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 10:07:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2020-12-22 10:07:05,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1953. [2020-12-22 10:07:05,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1953 states. [2020-12-22 10:07:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 3101 transitions. [2020-12-22 10:07:05,422 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 3101 transitions. Word has length 77 [2020-12-22 10:07:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:05,422 INFO L481 AbstractCegarLoop]: Abstraction has 1953 states and 3101 transitions. [2020-12-22 10:07:05,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:05,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 3101 transitions. [2020-12-22 10:07:05,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:05,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:05,424 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] [2020-12-22 10:07:05,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:07:05,424 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:05,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1546824319, now seen corresponding path program 1 times [2020-12-22 10:07:05,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:05,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977600207] [2020-12-22 10:07:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:05,505 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 10:07:05,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977600207] [2020-12-22 10:07:05,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:05,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:05,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73068886] [2020-12-22 10:07:05,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:05,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:05,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:05,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:05,508 INFO L87 Difference]: Start difference. First operand 1953 states and 3101 transitions. Second operand 3 states. [2020-12-22 10:07:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:05,572 INFO L93 Difference]: Finished difference Result 2709 states and 4295 transitions. [2020-12-22 10:07:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:05,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:05,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:05,585 INFO L225 Difference]: With dead ends: 2709 [2020-12-22 10:07:05,586 INFO L226 Difference]: Without dead ends: 2307 [2020-12-22 10:07:05,587 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 10:07:05,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2020-12-22 10:07:05,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2305. [2020-12-22 10:07:05,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2305 states. [2020-12-22 10:07:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3649 transitions. [2020-12-22 10:07:05,654 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3649 transitions. Word has length 77 [2020-12-22 10:07:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:05,655 INFO L481 AbstractCegarLoop]: Abstraction has 2305 states and 3649 transitions. [2020-12-22 10:07:05,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3649 transitions. [2020-12-22 10:07:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:05,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:05,656 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] [2020-12-22 10:07:05,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:07:05,657 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1884617461, now seen corresponding path program 1 times [2020-12-22 10:07:05,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:05,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481562733] [2020-12-22 10:07:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:05,722 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 10:07:05,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481562733] [2020-12-22 10:07:05,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:05,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:05,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360231043] [2020-12-22 10:07:05,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:05,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:05,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:05,725 INFO L87 Difference]: Start difference. First operand 2305 states and 3649 transitions. Second operand 3 states. [2020-12-22 10:07:05,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:05,802 INFO L93 Difference]: Finished difference Result 3717 states and 5859 transitions. [2020-12-22 10:07:05,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:05,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:05,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:05,817 INFO L225 Difference]: With dead ends: 3717 [2020-12-22 10:07:05,818 INFO L226 Difference]: Without dead ends: 2963 [2020-12-22 10:07:05,820 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 10:07:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-12-22 10:07:05,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2961. [2020-12-22 10:07:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2961 states. [2020-12-22 10:07:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 4657 transitions. [2020-12-22 10:07:05,921 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 4657 transitions. Word has length 77 [2020-12-22 10:07:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:05,922 INFO L481 AbstractCegarLoop]: Abstraction has 2961 states and 4657 transitions. [2020-12-22 10:07:05,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 4657 transitions. [2020-12-22 10:07:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:05,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:05,923 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] [2020-12-22 10:07:05,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:07:05,923 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:05,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2001711063, now seen corresponding path program 1 times [2020-12-22 10:07:05,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:05,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953163854] [2020-12-22 10:07:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:06,104 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 10:07:06,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953163854] [2020-12-22 10:07:06,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:06,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:06,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416996080] [2020-12-22 10:07:06,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:06,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:06,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:06,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:06,108 INFO L87 Difference]: Start difference. First operand 2961 states and 4657 transitions. Second operand 8 states. [2020-12-22 10:07:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:07,026 INFO L93 Difference]: Finished difference Result 19881 states and 30973 transitions. [2020-12-22 10:07:07,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:07:07,027 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:07:07,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:07,109 INFO L225 Difference]: With dead ends: 19881 [2020-12-22 10:07:07,109 INFO L226 Difference]: Without dead ends: 18471 [2020-12-22 10:07:07,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:07:07,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18471 states. [2020-12-22 10:07:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18471 to 4369. [2020-12-22 10:07:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4369 states. [2020-12-22 10:07:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 6785 transitions. [2020-12-22 10:07:07,512 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 6785 transitions. Word has length 77 [2020-12-22 10:07:07,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:07,513 INFO L481 AbstractCegarLoop]: Abstraction has 4369 states and 6785 transitions. [2020-12-22 10:07:07,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:07,513 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 6785 transitions. [2020-12-22 10:07:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:07:07,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:07,514 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] [2020-12-22 10:07:07,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:07:07,515 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:07,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:07,516 INFO L82 PathProgramCache]: Analyzing trace with hash -914675591, now seen corresponding path program 1 times [2020-12-22 10:07:07,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:07,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780228960] [2020-12-22 10:07:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:07,592 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 10:07:07,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780228960] [2020-12-22 10:07:07,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:07,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:07,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822678024] [2020-12-22 10:07:07,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:07,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:07,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:07,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:07,595 INFO L87 Difference]: Start difference. First operand 4369 states and 6785 transitions. Second operand 3 states. [2020-12-22 10:07:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:07,948 INFO L93 Difference]: Finished difference Result 9653 states and 14819 transitions. [2020-12-22 10:07:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:07,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:07:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:07,966 INFO L225 Difference]: With dead ends: 9653 [2020-12-22 10:07:07,967 INFO L226 Difference]: Without dead ends: 6835 [2020-12-22 10:07:07,974 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 10:07:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6835 states. [2020-12-22 10:07:08,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6835 to 6769. [2020-12-22 10:07:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6769 states. [2020-12-22 10:07:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 10273 transitions. [2020-12-22 10:07:08,379 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 10273 transitions. Word has length 79 [2020-12-22 10:07:08,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:08,379 INFO L481 AbstractCegarLoop]: Abstraction has 6769 states and 10273 transitions. [2020-12-22 10:07:08,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 10273 transitions. [2020-12-22 10:07:08,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:07:08,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:08,381 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] [2020-12-22 10:07:08,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:07:08,381 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:08,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash -848182079, now seen corresponding path program 1 times [2020-12-22 10:07:08,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:08,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834151866] [2020-12-22 10:07:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:08,692 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 10:07:08,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834151866] [2020-12-22 10:07:08,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:08,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:08,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917103357] [2020-12-22 10:07:08,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:08,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:08,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:08,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:08,695 INFO L87 Difference]: Start difference. First operand 6769 states and 10273 transitions. Second operand 8 states. [2020-12-22 10:07:09,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:09,283 INFO L93 Difference]: Finished difference Result 11989 states and 18083 transitions. [2020-12-22 10:07:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:07:09,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:07:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:09,299 INFO L225 Difference]: With dead ends: 11989 [2020-12-22 10:07:09,299 INFO L226 Difference]: Without dead ends: 6771 [2020-12-22 10:07:09,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:07:09,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6771 states. [2020-12-22 10:07:09,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6771 to 6769. [2020-12-22 10:07:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6769 states. [2020-12-22 10:07:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 10209 transitions. [2020-12-22 10:07:09,694 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 10209 transitions. Word has length 79 [2020-12-22 10:07:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:09,695 INFO L481 AbstractCegarLoop]: Abstraction has 6769 states and 10209 transitions. [2020-12-22 10:07:09,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:09,695 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 10209 transitions. [2020-12-22 10:07:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:07:09,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:09,696 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] [2020-12-22 10:07:09,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:07:09,697 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:09,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:09,697 INFO L82 PathProgramCache]: Analyzing trace with hash -938563623, now seen corresponding path program 1 times [2020-12-22 10:07:09,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:09,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746069245] [2020-12-22 10:07:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:09,796 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 10:07:09,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746069245] [2020-12-22 10:07:09,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:09,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:07:09,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916701361] [2020-12-22 10:07:09,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:07:09,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:09,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:07:09,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:07:09,799 INFO L87 Difference]: Start difference. First operand 6769 states and 10209 transitions. Second operand 6 states. [2020-12-22 10:07:10,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:10,291 INFO L93 Difference]: Finished difference Result 11987 states and 17954 transitions. [2020-12-22 10:07:10,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:07:10,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 10:07:10,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:10,308 INFO L225 Difference]: With dead ends: 11987 [2020-12-22 10:07:10,308 INFO L226 Difference]: Without dead ends: 6769 [2020-12-22 10:07:10,317 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 10:07:10,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2020-12-22 10:07:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 6769. [2020-12-22 10:07:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6769 states. [2020-12-22 10:07:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 10145 transitions. [2020-12-22 10:07:10,843 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 10145 transitions. Word has length 80 [2020-12-22 10:07:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:10,844 INFO L481 AbstractCegarLoop]: Abstraction has 6769 states and 10145 transitions. [2020-12-22 10:07:10,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:07:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 10145 transitions. [2020-12-22 10:07:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:07:10,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:10,845 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] [2020-12-22 10:07:10,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:07:10,846 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:10,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:10,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1639628201, now seen corresponding path program 1 times [2020-12-22 10:07:10,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:10,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099816439] [2020-12-22 10:07:10,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:10,953 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 10:07:10,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099816439] [2020-12-22 10:07:10,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:10,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:10,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922658217] [2020-12-22 10:07:10,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:10,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:10,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:10,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:10,955 INFO L87 Difference]: Start difference. First operand 6769 states and 10145 transitions. Second operand 8 states. [2020-12-22 10:07:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:11,772 INFO L93 Difference]: Finished difference Result 10675 states and 15788 transitions. [2020-12-22 10:07:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:07:11,773 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:07:11,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:11,796 INFO L225 Difference]: With dead ends: 10675 [2020-12-22 10:07:11,796 INFO L226 Difference]: Without dead ends: 10673 [2020-12-22 10:07:11,801 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 10:07:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2020-12-22 10:07:12,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 6961. [2020-12-22 10:07:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6961 states. [2020-12-22 10:07:12,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 10305 transitions. [2020-12-22 10:07:12,303 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 10305 transitions. Word has length 80 [2020-12-22 10:07:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:12,304 INFO L481 AbstractCegarLoop]: Abstraction has 6961 states and 10305 transitions. [2020-12-22 10:07:12,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:12,304 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 10305 transitions. [2020-12-22 10:07:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 10:07:12,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:12,307 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] [2020-12-22 10:07:12,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:07:12,307 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:12,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash 492740282, now seen corresponding path program 1 times [2020-12-22 10:07:12,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:12,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489390823] [2020-12-22 10:07:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:12,367 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 10:07:12,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489390823] [2020-12-22 10:07:12,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:12,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:12,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667227245] [2020-12-22 10:07:12,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:12,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:12,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:12,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:12,370 INFO L87 Difference]: Start difference. First operand 6961 states and 10305 transitions. Second operand 3 states. [2020-12-22 10:07:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:13,145 INFO L93 Difference]: Finished difference Result 12472 states and 18375 transitions. [2020-12-22 10:07:13,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:13,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 10:07:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:13,167 INFO L225 Difference]: With dead ends: 12472 [2020-12-22 10:07:13,167 INFO L226 Difference]: Without dead ends: 9461 [2020-12-22 10:07:13,175 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 10:07:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9461 states. [2020-12-22 10:07:14,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9461 to 9459. [2020-12-22 10:07:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9459 states. [2020-12-22 10:07:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 13859 transitions. [2020-12-22 10:07:14,040 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 13859 transitions. Word has length 81 [2020-12-22 10:07:14,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:14,040 INFO L481 AbstractCegarLoop]: Abstraction has 9459 states and 13859 transitions. [2020-12-22 10:07:14,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:14,041 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 13859 transitions. [2020-12-22 10:07:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:07:14,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:14,047 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:07:14,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:07:14,048 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash 651816077, now seen corresponding path program 1 times [2020-12-22 10:07:14,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:14,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194647603] [2020-12-22 10:07:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:07:14,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194647603] [2020-12-22 10:07:14,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:14,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:14,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804022591] [2020-12-22 10:07:14,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:14,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:14,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:14,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:14,214 INFO L87 Difference]: Start difference. First operand 9459 states and 13859 transitions. Second operand 8 states. [2020-12-22 10:07:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:17,142 INFO L93 Difference]: Finished difference Result 58465 states and 84394 transitions. [2020-12-22 10:07:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:07:17,143 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:07:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:17,260 INFO L225 Difference]: With dead ends: 58465 [2020-12-22 10:07:17,260 INFO L226 Difference]: Without dead ends: 50559 [2020-12-22 10:07:17,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:07:17,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50559 states. [2020-12-22 10:07:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50559 to 17363. [2020-12-22 10:07:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17363 states. [2020-12-22 10:07:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17363 states to 17363 states and 25155 transitions. [2020-12-22 10:07:18,932 INFO L78 Accepts]: Start accepts. Automaton has 17363 states and 25155 transitions. Word has length 111 [2020-12-22 10:07:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:18,932 INFO L481 AbstractCegarLoop]: Abstraction has 17363 states and 25155 transitions. [2020-12-22 10:07:18,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 17363 states and 25155 transitions. [2020-12-22 10:07:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:07:18,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:18,939 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:07:18,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:07:18,939 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:18,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:18,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1116966739, now seen corresponding path program 1 times [2020-12-22 10:07:18,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:18,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942788068] [2020-12-22 10:07:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:07:19,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942788068] [2020-12-22 10:07:19,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:19,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:19,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956031891] [2020-12-22 10:07:19,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:19,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:19,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:19,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:19,098 INFO L87 Difference]: Start difference. First operand 17363 states and 25155 transitions. Second operand 8 states. [2020-12-22 10:07:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:22,743 INFO L93 Difference]: Finished difference Result 66369 states and 95690 transitions. [2020-12-22 10:07:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:07:22,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:07:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:22,858 INFO L225 Difference]: With dead ends: 66369 [2020-12-22 10:07:22,858 INFO L226 Difference]: Without dead ends: 58463 [2020-12-22 10:07:22,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:07:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58463 states. [2020-12-22 10:07:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58463 to 29235. [2020-12-22 10:07:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29235 states. [2020-12-22 10:07:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29235 states to 29235 states and 42019 transitions. [2020-12-22 10:07:25,152 INFO L78 Accepts]: Start accepts. Automaton has 29235 states and 42019 transitions. Word has length 111 [2020-12-22 10:07:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:25,152 INFO L481 AbstractCegarLoop]: Abstraction has 29235 states and 42019 transitions. [2020-12-22 10:07:25,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 29235 states and 42019 transitions. [2020-12-22 10:07:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:07:25,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:25,161 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:07:25,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:07:25,161 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:25,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:25,162 INFO L82 PathProgramCache]: Analyzing trace with hash 14673101, now seen corresponding path program 1 times [2020-12-22 10:07:25,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:25,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703535002] [2020-12-22 10:07:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:07:25,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703535002] [2020-12-22 10:07:25,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:25,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:25,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643657403] [2020-12-22 10:07:25,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:25,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:25,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:25,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:25,297 INFO L87 Difference]: Start difference. First operand 29235 states and 42019 transitions. Second operand 8 states. [2020-12-22 10:07:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:29,656 INFO L93 Difference]: Finished difference Result 74273 states and 106986 transitions. [2020-12-22 10:07:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:07:29,656 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:07:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:29,784 INFO L225 Difference]: With dead ends: 74273 [2020-12-22 10:07:29,784 INFO L226 Difference]: Without dead ends: 66367 [2020-12-22 10:07:29,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:07:29,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66367 states. [2020-12-22 10:07:32,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66367 to 37139. [2020-12-22 10:07:32,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37139 states. [2020-12-22 10:07:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37139 states to 37139 states and 53315 transitions. [2020-12-22 10:07:32,834 INFO L78 Accepts]: Start accepts. Automaton has 37139 states and 53315 transitions. Word has length 111 [2020-12-22 10:07:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:32,835 INFO L481 AbstractCegarLoop]: Abstraction has 37139 states and 53315 transitions. [2020-12-22 10:07:32,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 37139 states and 53315 transitions. [2020-12-22 10:07:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:07:32,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:32,844 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:07:32,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:07:32,845 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:32,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:32,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1220785939, now seen corresponding path program 1 times [2020-12-22 10:07:32,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:32,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474388421] [2020-12-22 10:07:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:07:32,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474388421] [2020-12-22 10:07:32,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:32,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:32,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726872694] [2020-12-22 10:07:32,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:32,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:32,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:32,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:32,971 INFO L87 Difference]: Start difference. First operand 37139 states and 53315 transitions. Second operand 8 states. [2020-12-22 10:07:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:37,920 INFO L93 Difference]: Finished difference Result 82177 states and 118282 transitions. [2020-12-22 10:07:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:07:37,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:07:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:38,027 INFO L225 Difference]: With dead ends: 82177 [2020-12-22 10:07:38,028 INFO L226 Difference]: Without dead ends: 74271 [2020-12-22 10:07:38,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:07:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74271 states. [2020-12-22 10:07:41,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74271 to 45043. [2020-12-22 10:07:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45043 states. [2020-12-22 10:07:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45043 states to 45043 states and 64611 transitions. [2020-12-22 10:07:41,735 INFO L78 Accepts]: Start accepts. Automaton has 45043 states and 64611 transitions. Word has length 111 [2020-12-22 10:07:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:41,735 INFO L481 AbstractCegarLoop]: Abstraction has 45043 states and 64611 transitions. [2020-12-22 10:07:41,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 45043 states and 64611 transitions. [2020-12-22 10:07:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:07:41,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:41,744 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:07:41,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:07:41,745 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:41,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:41,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1653185805, now seen corresponding path program 1 times [2020-12-22 10:07:41,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:41,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462249461] [2020-12-22 10:07:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:07:41,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462249461] [2020-12-22 10:07:41,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:41,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:41,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732901693] [2020-12-22 10:07:41,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:41,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:41,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:41,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:41,872 INFO L87 Difference]: Start difference. First operand 45043 states and 64611 transitions. Second operand 8 states. [2020-12-22 10:07:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:47,834 INFO L93 Difference]: Finished difference Result 90081 states and 129578 transitions. [2020-12-22 10:07:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:07:47,835 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:07:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:47,920 INFO L225 Difference]: With dead ends: 90081 [2020-12-22 10:07:47,920 INFO L226 Difference]: Without dead ends: 82175 [2020-12-22 10:07:47,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:07:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82175 states. [2020-12-22 10:07:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82175 to 52947. [2020-12-22 10:07:52,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52947 states. [2020-12-22 10:07:52,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52947 states to 52947 states and 75907 transitions. [2020-12-22 10:07:52,271 INFO L78 Accepts]: Start accepts. Automaton has 52947 states and 75907 transitions. Word has length 111 [2020-12-22 10:07:52,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:52,271 INFO L481 AbstractCegarLoop]: Abstraction has 52947 states and 75907 transitions. [2020-12-22 10:07:52,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:52,272 INFO L276 IsEmpty]: Start isEmpty. Operand 52947 states and 75907 transitions. [2020-12-22 10:07:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:07:52,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:52,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:52,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:07:52,291 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:52,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2019174363, now seen corresponding path program 1 times [2020-12-22 10:07:52,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:52,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207432821] [2020-12-22 10:07:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:52,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207432821] [2020-12-22 10:07:52,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:52,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:52,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377736236] [2020-12-22 10:07:52,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:52,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:52,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:52,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:52,367 INFO L87 Difference]: Start difference. First operand 52947 states and 75907 transitions. Second operand 3 states. [2020-12-22 10:07:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:55,625 INFO L93 Difference]: Finished difference Result 88760 states and 127532 transitions. [2020-12-22 10:07:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:55,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:07:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:55,666 INFO L225 Difference]: With dead ends: 88760 [2020-12-22 10:07:55,672 INFO L226 Difference]: Without dead ends: 37366 [2020-12-22 10:07:55,702 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 10:07:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37366 states. [2020-12-22 10:07:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37366 to 37364. [2020-12-22 10:07:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37364 states. [2020-12-22 10:07:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37364 states to 37364 states and 53673 transitions. [2020-12-22 10:07:58,567 INFO L78 Accepts]: Start accepts. Automaton has 37364 states and 53673 transitions. Word has length 113 [2020-12-22 10:07:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:58,567 INFO L481 AbstractCegarLoop]: Abstraction has 37364 states and 53673 transitions. [2020-12-22 10:07:58,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 37364 states and 53673 transitions. [2020-12-22 10:07:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:07:58,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:58,575 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:58,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:07:58,576 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:58,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:58,576 INFO L82 PathProgramCache]: Analyzing trace with hash -21629902, now seen corresponding path program 1 times [2020-12-22 10:07:58,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:58,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713942091] [2020-12-22 10:07:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:07:58,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713942091] [2020-12-22 10:07:58,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:58,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:58,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835408149] [2020-12-22 10:07:58,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:58,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:58,695 INFO L87 Difference]: Start difference. First operand 37364 states and 53673 transitions. Second operand 8 states. [2020-12-22 10:08:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:04,022 INFO L93 Difference]: Finished difference Result 70402 states and 101296 transitions. [2020-12-22 10:08:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:04,022 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 113 [2020-12-22 10:08:04,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:04,085 INFO L225 Difference]: With dead ends: 70402 [2020-12-22 10:08:04,085 INFO L226 Difference]: Without dead ends: 64896 [2020-12-22 10:08:04,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64896 states. [2020-12-22 10:08:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64896 to 42868. [2020-12-22 10:08:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42868 states. [2020-12-22 10:08:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42868 states to 42868 states and 61545 transitions. [2020-12-22 10:08:07,698 INFO L78 Accepts]: Start accepts. Automaton has 42868 states and 61545 transitions. Word has length 113 [2020-12-22 10:08:07,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:07,699 INFO L481 AbstractCegarLoop]: Abstraction has 42868 states and 61545 transitions. [2020-12-22 10:08:07,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 42868 states and 61545 transitions. [2020-12-22 10:08:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:08:07,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:07,707 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:08:07,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:08:07,708 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:07,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:07,708 INFO L82 PathProgramCache]: Analyzing trace with hash 254785081, now seen corresponding path program 1 times [2020-12-22 10:08:07,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:07,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066619554] [2020-12-22 10:08:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:08:08,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066619554] [2020-12-22 10:08:08,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148030097] [2020-12-22 10:08:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:08:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:08,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:08:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:08:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:08:08,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:08:08,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 10:08:08,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218221515] [2020-12-22 10:08:08,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:08:08,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:08,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:08:08,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:08:08,606 INFO L87 Difference]: Start difference. First operand 42868 states and 61545 transitions. Second operand 16 states. [2020-12-22 10:08:38,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:38,254 INFO L93 Difference]: Finished difference Result 308809 states and 435780 transitions. [2020-12-22 10:08:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 10:08:38,255 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 114 [2020-12-22 10:08:38,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:38,723 INFO L225 Difference]: With dead ends: 308809 [2020-12-22 10:08:38,723 INFO L226 Difference]: Without dead ends: 267527 [2020-12-22 10:08:38,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 10:08:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267527 states. [2020-12-22 10:08:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267527 to 134561. [2020-12-22 10:08:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134561 states. [2020-12-22 10:08:53,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134561 states to 134561 states and 187783 transitions. [2020-12-22 10:08:53,401 INFO L78 Accepts]: Start accepts. Automaton has 134561 states and 187783 transitions. Word has length 114 [2020-12-22 10:08:53,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:53,402 INFO L481 AbstractCegarLoop]: Abstraction has 134561 states and 187783 transitions. [2020-12-22 10:08:53,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:08:53,402 INFO L276 IsEmpty]: Start isEmpty. Operand 134561 states and 187783 transitions. [2020-12-22 10:08:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 10:08:53,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:53,422 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:53,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 10:08:53,636 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:53,638 INFO L82 PathProgramCache]: Analyzing trace with hash -725866966, now seen corresponding path program 1 times [2020-12-22 10:08:53,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:53,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251848812] [2020-12-22 10:08:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:08:54,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251848812] [2020-12-22 10:08:54,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557383172] [2020-12-22 10:08:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:08:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:54,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:08:54,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:08:54,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:08:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:08:54,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:08:54,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:08:54,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695467702] [2020-12-22 10:08:54,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:08:54,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:54,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:08:54,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:08:54,969 INFO L87 Difference]: Start difference. First operand 134561 states and 187783 transitions. Second operand 22 states. [2020-12-22 10:08:55,393 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:08:57,220 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-22 10:08:57,627 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 10:08:58,321 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-12-22 10:09:11,868 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:09:20,214 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-22 10:09:20,487 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-22 10:09:20,811 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-12-22 10:09:21,046 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 10:09:21,342 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-22 10:09:21,791 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-22 10:09:22,087 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-12-22 10:09:22,387 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-12-22 10:09:22,549 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 10:09:22,756 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-12-22 10:09:23,013 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-22 10:09:23,326 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-12-22 10:09:24,574 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:09:25,989 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 10:09:42,647 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:09:43,812 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 10:09:44,470 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:09:45,489 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 10:09:45,866 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 10:09:47,510 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 10:09:47,764 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 10:10:20,575 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-12-22 10:10:20,740 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:10:20,944 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-22 10:10:21,320 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-12-22 10:10:21,553 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-12-22 10:10:23,978 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-12-22 10:10:24,139 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:10:25,898 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-12-22 10:10:26,081 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 10:10:26,324 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-12-22 10:10:29,569 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-12-22 10:10:29,756 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49