/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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:26:05,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:26:05,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:26:05,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:26:05,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:26:05,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:26:05,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:26:05,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:26:05,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:26:05,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:26:05,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:26:05,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:26:05,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:26:05,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:26:05,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:26:05,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:26:05,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:26:05,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:26:05,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:26:05,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:26:05,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:26:05,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:26:05,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:26:05,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:26:05,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:26:05,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:26:05,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:26:05,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:26:05,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:26:05,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:26:05,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:26:05,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:26:05,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:26:05,289 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:26:05,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:26:05,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:26:05,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:26:05,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:26:05,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:26:05,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:26:05,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:26:05,291 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:26:05,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:26:05,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:26:05,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:26:05,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:26:05,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:26:05,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:26:05,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:26:05,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:26:05,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:26:05,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:26:05,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:26:05,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:26:05,294 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:26:05,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:26:05,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:26:05,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:26:05,710 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:26:05,710 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:26:05,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:26:05,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82f93069f/997ef09a0bae41949c5bd9f450358ec5/FLAG1ca1ae11b [2020-12-22 10:26:06,817 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:26:06,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:26:06,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82f93069f/997ef09a0bae41949c5bd9f450358ec5/FLAG1ca1ae11b [2020-12-22 10:26:07,200 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82f93069f/997ef09a0bae41949c5bd9f450358ec5 [2020-12-22 10:26:07,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:26:07,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:26:07,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:26:07,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:26:07,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:26:07,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:26:07" (1/1) ... [2020-12-22 10:26:07,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62cb877b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:07, skipping insertion in model container [2020-12-22 10:26:07,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:26:07" (1/1) ... [2020-12-22 10:26:07,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:26:07,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:26:07,891 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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[26949,26962] [2020-12-22 10:26:07,997 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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[33996,34009] [2020-12-22 10:26:09,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:26:09,080 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:26:09,182 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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[26949,26962] [2020-12-22 10:26:09,200 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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[33996,34009] [2020-12-22 10:26:09,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:26:09,969 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:26:09,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:09 WrapperNode [2020-12-22 10:26:09,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:26:09,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:26:09,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:26:09,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:26:09,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:09" (1/1) ... [2020-12-22 10:26:10,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:09" (1/1) ... [2020-12-22 10:26:10,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:26:10,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:26:10,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:26:10,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:26:10,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:09" (1/1) ... [2020-12-22 10:26:10,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:09" (1/1) ... [2020-12-22 10:26:10,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:09" (1/1) ... [2020-12-22 10:26:10,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:09" (1/1) ... [2020-12-22 10:26:11,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:09" (1/1) ... [2020-12-22 10:26:11,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:09" (1/1) ... [2020-12-22 10:26:11,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:09" (1/1) ... [2020-12-22 10:26:11,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:26:11,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:26:11,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:26:11,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:26:11,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:09" (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 10:26:11,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:26:11,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:26:11,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:26:11,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:26:19,097 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:26:19,098 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:26:19,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:26:19 BoogieIcfgContainer [2020-12-22 10:26:19,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:26:19,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:26:19,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:26:19,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:26:19,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:26:07" (1/3) ... [2020-12-22 10:26:19,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779330f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:26:19, skipping insertion in model container [2020-12-22 10:26:19,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:09" (2/3) ... [2020-12-22 10:26:19,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779330f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:26:19, skipping insertion in model container [2020-12-22 10:26:19,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:26:19" (3/3) ... [2020-12-22 10:26:19,112 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:26:19,120 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:26:19,128 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:26:19,150 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:26:19,190 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:26:19,190 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:26:19,190 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:26:19,191 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:26:19,191 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:26:19,191 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:26:19,191 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:26:19,191 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:26:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states. [2020-12-22 10:26:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:26:19,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:19,243 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] [2020-12-22 10:26:19,243 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:19,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:19,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2107180874, now seen corresponding path program 1 times [2020-12-22 10:26:19,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:19,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034532621] [2020-12-22 10:26:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:19,661 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 10:26:19,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034532621] [2020-12-22 10:26:19,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:19,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:26:19,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485175549] [2020-12-22 10:26:19,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:26:19,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:19,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:26:19,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:26:19,696 INFO L87 Difference]: Start difference. First operand 962 states. Second operand 2 states. [2020-12-22 10:26:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:19,800 INFO L93 Difference]: Finished difference Result 1855 states and 3508 transitions. [2020-12-22 10:26:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:26:19,801 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:26:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:19,838 INFO L225 Difference]: With dead ends: 1855 [2020-12-22 10:26:19,838 INFO L226 Difference]: Without dead ends: 896 [2020-12-22 10:26:19,860 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 10:26:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-12-22 10:26:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2020-12-22 10:26:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-12-22 10:26:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1687 transitions. [2020-12-22 10:26:19,982 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1687 transitions. Word has length 46 [2020-12-22 10:26:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:19,982 INFO L481 AbstractCegarLoop]: Abstraction has 896 states and 1687 transitions. [2020-12-22 10:26:19,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:26:19,983 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1687 transitions. [2020-12-22 10:26:19,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:26:19,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:19,986 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] [2020-12-22 10:26:19,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:26:19,986 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:26:19,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:19,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214628127] [2020-12-22 10:26:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:20,132 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 10:26:20,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214628127] [2020-12-22 10:26:20,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:20,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:26:20,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639528097] [2020-12-22 10:26:20,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:26:20,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:20,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:26:20,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:26:20,137 INFO L87 Difference]: Start difference. First operand 896 states and 1687 transitions. Second operand 5 states. [2020-12-22 10:26:20,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:20,387 INFO L93 Difference]: Finished difference Result 975 states and 1811 transitions. [2020-12-22 10:26:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:26:20,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:26:20,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:20,394 INFO L225 Difference]: With dead ends: 975 [2020-12-22 10:26:20,394 INFO L226 Difference]: Without dead ends: 896 [2020-12-22 10:26:20,396 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 10:26:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-12-22 10:26:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2020-12-22 10:26:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-12-22 10:26:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1626 transitions. [2020-12-22 10:26:20,429 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1626 transitions. Word has length 46 [2020-12-22 10:26:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:20,430 INFO L481 AbstractCegarLoop]: Abstraction has 896 states and 1626 transitions. [2020-12-22 10:26:20,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:26:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1626 transitions. [2020-12-22 10:26:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 10:26:20,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:20,432 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] [2020-12-22 10:26:20,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:26:20,433 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1194000637, now seen corresponding path program 1 times [2020-12-22 10:26:20,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:20,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628301707] [2020-12-22 10:26:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:20,708 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 10:26:20,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628301707] [2020-12-22 10:26:20,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:20,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:20,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343953563] [2020-12-22 10:26:20,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:26:20,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:20,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:26:20,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:26:20,722 INFO L87 Difference]: Start difference. First operand 896 states and 1626 transitions. Second operand 4 states. [2020-12-22 10:26:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:37,684 INFO L93 Difference]: Finished difference Result 3151 states and 5935 transitions. [2020-12-22 10:26:37,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:26:37,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 10:26:37,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:37,700 INFO L225 Difference]: With dead ends: 3151 [2020-12-22 10:26:37,702 INFO L226 Difference]: Without dead ends: 2398 [2020-12-22 10:26:37,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:26:37,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2020-12-22 10:26:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 2398. [2020-12-22 10:26:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2398 states. [2020-12-22 10:26:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 3740 transitions. [2020-12-22 10:26:37,790 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 3740 transitions. Word has length 63 [2020-12-22 10:26:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:37,792 INFO L481 AbstractCegarLoop]: Abstraction has 2398 states and 3740 transitions. [2020-12-22 10:26:37,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:26:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 3740 transitions. [2020-12-22 10:26:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:37,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:37,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:37,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:26:37,803 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:37,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:26:37,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:37,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584127303] [2020-12-22 10:26:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:38,020 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 10:26:38,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584127303] [2020-12-22 10:26:38,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:38,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:38,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902058796] [2020-12-22 10:26:38,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:38,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:38,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:38,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:38,023 INFO L87 Difference]: Start difference. First operand 2398 states and 3740 transitions. Second operand 3 states. [2020-12-22 10:26:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:38,076 INFO L93 Difference]: Finished difference Result 2542 states and 3970 transitions. [2020-12-22 10:26:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:38,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:38,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:38,090 INFO L225 Difference]: With dead ends: 2542 [2020-12-22 10:26:38,091 INFO L226 Difference]: Without dead ends: 2467 [2020-12-22 10:26:38,092 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 10:26:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2020-12-22 10:26:38,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2465. [2020-12-22 10:26:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 10:26:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3848 transitions. [2020-12-22 10:26:38,158 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3848 transitions. Word has length 106 [2020-12-22 10:26:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:38,160 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3848 transitions. [2020-12-22 10:26:38,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3848 transitions. [2020-12-22 10:26:38,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:38,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:38,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:38,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:26:38,163 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:38,163 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:26:38,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:38,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731334606] [2020-12-22 10:26:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:38,311 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 10:26:38,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731334606] [2020-12-22 10:26:38,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:38,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:38,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10493639] [2020-12-22 10:26:38,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:38,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:38,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:38,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:38,316 INFO L87 Difference]: Start difference. First operand 2465 states and 3848 transitions. Second operand 3 states. [2020-12-22 10:26:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:38,415 INFO L93 Difference]: Finished difference Result 2737 states and 4284 transitions. [2020-12-22 10:26:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:38,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:38,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:38,440 INFO L225 Difference]: With dead ends: 2737 [2020-12-22 10:26:38,440 INFO L226 Difference]: Without dead ends: 2595 [2020-12-22 10:26:38,442 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 10:26:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2020-12-22 10:26:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2593. [2020-12-22 10:26:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2593 states. [2020-12-22 10:26:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 4053 transitions. [2020-12-22 10:26:38,535 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 4053 transitions. Word has length 106 [2020-12-22 10:26:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:38,535 INFO L481 AbstractCegarLoop]: Abstraction has 2593 states and 4053 transitions. [2020-12-22 10:26:38,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 4053 transitions. [2020-12-22 10:26:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:38,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:38,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:38,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:26:38,544 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:38,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:26:38,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:38,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229463028] [2020-12-22 10:26:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:38,727 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 10:26:38,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229463028] [2020-12-22 10:26:38,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:38,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:38,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58671781] [2020-12-22 10:26:38,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:38,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:38,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:38,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:38,733 INFO L87 Difference]: Start difference. First operand 2593 states and 4053 transitions. Second operand 3 states. [2020-12-22 10:26:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:38,843 INFO L93 Difference]: Finished difference Result 3109 states and 4879 transitions. [2020-12-22 10:26:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:38,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:38,864 INFO L225 Difference]: With dead ends: 3109 [2020-12-22 10:26:38,864 INFO L226 Difference]: Without dead ends: 2839 [2020-12-22 10:26:38,866 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 10:26:38,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2839 states. [2020-12-22 10:26:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2839 to 2837. [2020-12-22 10:26:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2837 states. [2020-12-22 10:26:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 4441 transitions. [2020-12-22 10:26:39,039 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 4441 transitions. Word has length 106 [2020-12-22 10:26:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:39,041 INFO L481 AbstractCegarLoop]: Abstraction has 2837 states and 4441 transitions. [2020-12-22 10:26:39,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 4441 transitions. [2020-12-22 10:26:39,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:39,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:39,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:39,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:26:39,049 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:39,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:39,049 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:26:39,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:39,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333926077] [2020-12-22 10:26:39,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:39,189 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 10:26:39,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333926077] [2020-12-22 10:26:39,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:39,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:39,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026541092] [2020-12-22 10:26:39,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:39,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:39,193 INFO L87 Difference]: Start difference. First operand 2837 states and 4441 transitions. Second operand 3 states. [2020-12-22 10:26:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:39,279 INFO L93 Difference]: Finished difference Result 3817 states and 6003 transitions. [2020-12-22 10:26:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:39,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:39,300 INFO L225 Difference]: With dead ends: 3817 [2020-12-22 10:26:39,300 INFO L226 Difference]: Without dead ends: 3303 [2020-12-22 10:26:39,304 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 10:26:39,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2020-12-22 10:26:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 3301. [2020-12-22 10:26:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3301 states. [2020-12-22 10:26:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3301 states to 3301 states and 5173 transitions. [2020-12-22 10:26:39,408 INFO L78 Accepts]: Start accepts. Automaton has 3301 states and 5173 transitions. Word has length 106 [2020-12-22 10:26:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:39,409 INFO L481 AbstractCegarLoop]: Abstraction has 3301 states and 5173 transitions. [2020-12-22 10:26:39,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3301 states and 5173 transitions. [2020-12-22 10:26:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:39,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:39,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:39,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:26:39,411 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:39,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:39,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:26:39,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:39,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785678597] [2020-12-22 10:26:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:39,667 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 10:26:39,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785678597] [2020-12-22 10:26:39,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:39,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:39,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105621813] [2020-12-22 10:26:39,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:39,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:39,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:39,671 INFO L87 Difference]: Start difference. First operand 3301 states and 5173 transitions. Second operand 10 states. [2020-12-22 10:26:41,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:41,166 INFO L93 Difference]: Finished difference Result 18949 states and 30021 transitions. [2020-12-22 10:26:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:26:41,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:26:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:41,259 INFO L225 Difference]: With dead ends: 18949 [2020-12-22 10:26:41,259 INFO L226 Difference]: Without dead ends: 17971 [2020-12-22 10:26:41,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:26:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17971 states. [2020-12-22 10:26:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17971 to 4277. [2020-12-22 10:26:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4277 states. [2020-12-22 10:26:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4277 states to 4277 states and 6693 transitions. [2020-12-22 10:26:41,717 INFO L78 Accepts]: Start accepts. Automaton has 4277 states and 6693 transitions. Word has length 106 [2020-12-22 10:26:41,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:41,717 INFO L481 AbstractCegarLoop]: Abstraction has 4277 states and 6693 transitions. [2020-12-22 10:26:41,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states and 6693 transitions. [2020-12-22 10:26:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:41,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:41,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:41,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:26:41,719 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:41,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:41,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:26:41,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:41,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836379158] [2020-12-22 10:26:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:41,824 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 10:26:41,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836379158] [2020-12-22 10:26:41,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:41,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:41,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586778410] [2020-12-22 10:26:41,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:41,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:41,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:41,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:41,827 INFO L87 Difference]: Start difference. First operand 4277 states and 6693 transitions. Second operand 3 states. [2020-12-22 10:26:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:42,096 INFO L93 Difference]: Finished difference Result 7171 states and 11241 transitions. [2020-12-22 10:26:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:42,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:42,110 INFO L225 Difference]: With dead ends: 7171 [2020-12-22 10:26:42,110 INFO L226 Difference]: Without dead ends: 5217 [2020-12-22 10:26:42,114 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 10:26:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5217 states. [2020-12-22 10:26:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5217 to 5215. [2020-12-22 10:26:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5215 states. [2020-12-22 10:26:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5215 states to 5215 states and 8143 transitions. [2020-12-22 10:26:42,376 INFO L78 Accepts]: Start accepts. Automaton has 5215 states and 8143 transitions. Word has length 108 [2020-12-22 10:26:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:42,377 INFO L481 AbstractCegarLoop]: Abstraction has 5215 states and 8143 transitions. [2020-12-22 10:26:42,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 5215 states and 8143 transitions. [2020-12-22 10:26:42,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:42,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:42,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:42,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:26:42,379 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:42,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:26:42,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:42,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347756714] [2020-12-22 10:26:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:42,965 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 10:26:42,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347756714] [2020-12-22 10:26:42,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:42,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:42,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121419724] [2020-12-22 10:26:42,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:42,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:42,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:42,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:42,968 INFO L87 Difference]: Start difference. First operand 5215 states and 8143 transitions. Second operand 10 states. [2020-12-22 10:26:43,406 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 10:26:43,544 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 10:26:43,710 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 10:26:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:44,280 INFO L93 Difference]: Finished difference Result 8107 states and 12665 transitions. [2020-12-22 10:26:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:44,281 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:26:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:44,296 INFO L225 Difference]: With dead ends: 8107 [2020-12-22 10:26:44,297 INFO L226 Difference]: Without dead ends: 5217 [2020-12-22 10:26:44,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:26:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5217 states. [2020-12-22 10:26:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5217 to 5215. [2020-12-22 10:26:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5215 states. [2020-12-22 10:26:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5215 states to 5215 states and 8119 transitions. [2020-12-22 10:26:44,627 INFO L78 Accepts]: Start accepts. Automaton has 5215 states and 8119 transitions. Word has length 108 [2020-12-22 10:26:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:44,628 INFO L481 AbstractCegarLoop]: Abstraction has 5215 states and 8119 transitions. [2020-12-22 10:26:44,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 5215 states and 8119 transitions. [2020-12-22 10:26:44,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:44,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:44,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:44,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:26:44,630 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:44,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:44,631 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:26:44,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:44,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941884463] [2020-12-22 10:26:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:44,743 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 10:26:44,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941884463] [2020-12-22 10:26:44,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:44,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:44,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677806485] [2020-12-22 10:26:44,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:44,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:44,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:44,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:44,748 INFO L87 Difference]: Start difference. First operand 5215 states and 8119 transitions. Second operand 3 states. [2020-12-22 10:26:45,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:45,185 INFO L93 Difference]: Finished difference Result 10707 states and 16633 transitions. [2020-12-22 10:26:45,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:45,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:45,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:45,206 INFO L225 Difference]: With dead ends: 10707 [2020-12-22 10:26:45,206 INFO L226 Difference]: Without dead ends: 7817 [2020-12-22 10:26:45,214 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 10:26:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7817 states. [2020-12-22 10:26:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7817 to 7815. [2020-12-22 10:26:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7815 states. [2020-12-22 10:26:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7815 states to 7815 states and 12087 transitions. [2020-12-22 10:26:45,676 INFO L78 Accepts]: Start accepts. Automaton has 7815 states and 12087 transitions. Word has length 108 [2020-12-22 10:26:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:45,677 INFO L481 AbstractCegarLoop]: Abstraction has 7815 states and 12087 transitions. [2020-12-22 10:26:45,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:45,677 INFO L276 IsEmpty]: Start isEmpty. Operand 7815 states and 12087 transitions. [2020-12-22 10:26:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:45,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:45,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:45,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:26:45,681 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:45,681 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:26:45,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:45,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020076297] [2020-12-22 10:26:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:45,786 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 10:26:45,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020076297] [2020-12-22 10:26:45,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:45,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:45,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590686007] [2020-12-22 10:26:45,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:45,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:45,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:45,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:45,789 INFO L87 Difference]: Start difference. First operand 7815 states and 12087 transitions. Second operand 3 states. [2020-12-22 10:26:46,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:46,550 INFO L93 Difference]: Finished difference Result 18219 states and 28057 transitions. [2020-12-22 10:26:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:46,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:46,584 INFO L225 Difference]: With dead ends: 18219 [2020-12-22 10:26:46,584 INFO L226 Difference]: Without dead ends: 12729 [2020-12-22 10:26:46,596 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 10:26:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12729 states. [2020-12-22 10:26:47,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12729 to 12727. [2020-12-22 10:26:47,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12727 states. [2020-12-22 10:26:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12727 states to 12727 states and 19495 transitions. [2020-12-22 10:26:47,416 INFO L78 Accepts]: Start accepts. Automaton has 12727 states and 19495 transitions. Word has length 108 [2020-12-22 10:26:47,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:47,417 INFO L481 AbstractCegarLoop]: Abstraction has 12727 states and 19495 transitions. [2020-12-22 10:26:47,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:47,417 INFO L276 IsEmpty]: Start isEmpty. Operand 12727 states and 19495 transitions. [2020-12-22 10:26:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:47,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:47,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:47,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:26:47,419 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:47,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:47,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:26:47,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:47,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778607587] [2020-12-22 10:26:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:47,508 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 10:26:47,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778607587] [2020-12-22 10:26:47,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:47,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:47,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896218668] [2020-12-22 10:26:47,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:47,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:47,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:47,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:47,515 INFO L87 Difference]: Start difference. First operand 12727 states and 19495 transitions. Second operand 3 states. [2020-12-22 10:26:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:48,920 INFO L93 Difference]: Finished difference Result 32379 states and 49321 transitions. [2020-12-22 10:26:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:48,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:48,982 INFO L225 Difference]: With dead ends: 32379 [2020-12-22 10:26:48,982 INFO L226 Difference]: Without dead ends: 21977 [2020-12-22 10:26:49,003 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 10:26:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21977 states. [2020-12-22 10:26:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21977 to 21975. [2020-12-22 10:26:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21975 states. [2020-12-22 10:26:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21975 states to 21975 states and 33255 transitions. [2020-12-22 10:26:50,671 INFO L78 Accepts]: Start accepts. Automaton has 21975 states and 33255 transitions. Word has length 108 [2020-12-22 10:26:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:50,671 INFO L481 AbstractCegarLoop]: Abstraction has 21975 states and 33255 transitions. [2020-12-22 10:26:50,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 21975 states and 33255 transitions. [2020-12-22 10:26:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:50,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:50,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:50,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:26:50,674 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:50,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:50,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:26:50,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:50,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793494510] [2020-12-22 10:26:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:50,762 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 10:26:50,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793494510] [2020-12-22 10:26:50,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:50,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:50,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366319875] [2020-12-22 10:26:50,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:50,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:50,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:50,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:50,765 INFO L87 Difference]: Start difference. First operand 21975 states and 33255 transitions. Second operand 3 states. [2020-12-22 10:26:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:52,687 INFO L93 Difference]: Finished difference Result 58971 states and 88681 transitions. [2020-12-22 10:26:52,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:52,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:52,782 INFO L225 Difference]: With dead ends: 58971 [2020-12-22 10:26:52,783 INFO L226 Difference]: Without dead ends: 39321 [2020-12-22 10:26:52,816 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 10:26:52,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39321 states. [2020-12-22 10:26:55,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39321 to 39319. [2020-12-22 10:26:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39319 states. [2020-12-22 10:26:55,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39319 states to 39319 states and 58663 transitions. [2020-12-22 10:26:55,422 INFO L78 Accepts]: Start accepts. Automaton has 39319 states and 58663 transitions. Word has length 108 [2020-12-22 10:26:55,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:55,422 INFO L481 AbstractCegarLoop]: Abstraction has 39319 states and 58663 transitions. [2020-12-22 10:26:55,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 39319 states and 58663 transitions. [2020-12-22 10:26:55,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:26:55,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:55,424 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:55,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:26:55,424 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:26:55,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:55,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649090083] [2020-12-22 10:26:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:55,595 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 10:26:55,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649090083] [2020-12-22 10:26:55,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:55,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:26:55,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051174963] [2020-12-22 10:26:55,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:26:55,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:55,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:26:55,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:26:55,598 INFO L87 Difference]: Start difference. First operand 39319 states and 58663 transitions. Second operand 8 states. [2020-12-22 10:27:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:00,512 INFO L93 Difference]: Finished difference Result 70974 states and 104728 transitions. [2020-12-22 10:27:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:00,513 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:27:00,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:00,673 INFO L225 Difference]: With dead ends: 70974 [2020-12-22 10:27:00,673 INFO L226 Difference]: Without dead ends: 70972 [2020-12-22 10:27:00,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:27:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70972 states. [2020-12-22 10:27:03,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70972 to 40855. [2020-12-22 10:27:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40855 states. [2020-12-22 10:27:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40855 states to 40855 states and 60071 transitions. [2020-12-22 10:27:03,988 INFO L78 Accepts]: Start accepts. Automaton has 40855 states and 60071 transitions. Word has length 109 [2020-12-22 10:27:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:03,989 INFO L481 AbstractCegarLoop]: Abstraction has 40855 states and 60071 transitions. [2020-12-22 10:27:03,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:27:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 40855 states and 60071 transitions. [2020-12-22 10:27:03,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 10:27:03,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:03,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:03,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:27:03,996 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:03,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:03,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1794247677, now seen corresponding path program 1 times [2020-12-22 10:27:03,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:03,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329875483] [2020-12-22 10:27:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:04,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329875483] [2020-12-22 10:27:04,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:04,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:04,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386645308] [2020-12-22 10:27:04,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:27:04,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:04,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:27:04,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:27:04,209 INFO L87 Difference]: Start difference. First operand 40855 states and 60071 transitions. Second operand 4 states. [2020-12-22 10:27:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:17,822 INFO L93 Difference]: Finished difference Result 44649 states and 66434 transitions. [2020-12-22 10:27:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:27:17,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 10:27:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:17,884 INFO L225 Difference]: With dead ends: 44649 [2020-12-22 10:27:17,885 INFO L226 Difference]: Without dead ends: 42357 [2020-12-22 10:27:17,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:27:17,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42357 states. [2020-12-22 10:27:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42357 to 41606. [2020-12-22 10:27:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41606 states. [2020-12-22 10:27:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41606 states to 41606 states and 60824 transitions. [2020-12-22 10:27:20,701 INFO L78 Accepts]: Start accepts. Automaton has 41606 states and 60824 transitions. Word has length 134 [2020-12-22 10:27:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:20,701 INFO L481 AbstractCegarLoop]: Abstraction has 41606 states and 60824 transitions. [2020-12-22 10:27:20,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:27:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 41606 states and 60824 transitions. [2020-12-22 10:27:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:20,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:20,727 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:27:20,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:27:20,727 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:20,728 INFO L82 PathProgramCache]: Analyzing trace with hash 949310851, now seen corresponding path program 1 times [2020-12-22 10:27:20,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:20,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018508795] [2020-12-22 10:27:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 10:27:20,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018508795] [2020-12-22 10:27:20,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:20,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:20,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274836641] [2020-12-22 10:27:20,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:20,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:20,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:20,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:20,999 INFO L87 Difference]: Start difference. First operand 41606 states and 60824 transitions. Second operand 10 states. [2020-12-22 10:27:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:39,731 INFO L93 Difference]: Finished difference Result 357272 states and 522849 transitions. [2020-12-22 10:27:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:39,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:27:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:40,516 INFO L225 Difference]: With dead ends: 357272 [2020-12-22 10:27:40,517 INFO L226 Difference]: Without dead ends: 318742 [2020-12-22 10:27:40,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:27:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318742 states. [2020-12-22 10:27:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318742 to 80134. [2020-12-22 10:27:48,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80134 states. [2020-12-22 10:27:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80134 states to 80134 states and 116888 transitions. [2020-12-22 10:27:48,415 INFO L78 Accepts]: Start accepts. Automaton has 80134 states and 116888 transitions. Word has length 148 [2020-12-22 10:27:48,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:48,416 INFO L481 AbstractCegarLoop]: Abstraction has 80134 states and 116888 transitions. [2020-12-22 10:27:48,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:48,416 INFO L276 IsEmpty]: Start isEmpty. Operand 80134 states and 116888 transitions. [2020-12-22 10:27:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:48,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:48,441 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:27:48,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:27:48,441 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:48,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:48,442 INFO L82 PathProgramCache]: Analyzing trace with hash 978833069, now seen corresponding path program 1 times [2020-12-22 10:27:48,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:48,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702870406] [2020-12-22 10:27:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:27:48,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702870406] [2020-12-22 10:27:48,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:48,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:48,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343737978] [2020-12-22 10:27:48,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:48,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:48,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:48,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:48,734 INFO L87 Difference]: Start difference. First operand 80134 states and 116888 transitions. Second operand 10 states. [2020-12-22 10:28:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:12,630 INFO L93 Difference]: Finished difference Result 395800 states and 578913 transitions. [2020-12-22 10:28:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:12,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:28:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:13,372 INFO L225 Difference]: With dead ends: 395800 [2020-12-22 10:28:13,372 INFO L226 Difference]: Without dead ends: 357270 [2020-12-22 10:28:13,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:13,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357270 states. [2020-12-22 10:28:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357270 to 137990. [2020-12-22 10:28:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137990 states. [2020-12-22 10:28:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137990 states to 137990 states and 200664 transitions. [2020-12-22 10:28:26,203 INFO L78 Accepts]: Start accepts. Automaton has 137990 states and 200664 transitions. Word has length 148 [2020-12-22 10:28:26,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:26,204 INFO L481 AbstractCegarLoop]: Abstraction has 137990 states and 200664 transitions. [2020-12-22 10:28:26,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:28:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 137990 states and 200664 transitions. [2020-12-22 10:28:26,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:28:26,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:26,225 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:26,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:28:26,225 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:26,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1252520781, now seen corresponding path program 1 times [2020-12-22 10:28:26,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:26,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992782077] [2020-12-22 10:28:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:28:26,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992782077] [2020-12-22 10:28:26,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:26,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:28:26,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090112677] [2020-12-22 10:28:26,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:28:26,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:28:26,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:28:26,474 INFO L87 Difference]: Start difference. First operand 137990 states and 200664 transitions. Second operand 10 states. [2020-12-22 10:28:55,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:55,304 INFO L93 Difference]: Finished difference Result 434328 states and 634977 transitions. [2020-12-22 10:28:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:55,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:28:55,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:56,008 INFO L225 Difference]: With dead ends: 434328 [2020-12-22 10:28:56,008 INFO L226 Difference]: Without dead ends: 395798 [2020-12-22 10:28:56,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395798 states. [2020-12-22 10:29:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395798 to 176518. [2020-12-22 10:29:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176518 states. [2020-12-22 10:29:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176518 states to 176518 states and 256728 transitions. [2020-12-22 10:29:12,998 INFO L78 Accepts]: Start accepts. Automaton has 176518 states and 256728 transitions. Word has length 148 [2020-12-22 10:29:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:12,999 INFO L481 AbstractCegarLoop]: Abstraction has 176518 states and 256728 transitions. [2020-12-22 10:29:12,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:29:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 176518 states and 256728 transitions. [2020-12-22 10:29:13,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:29:13,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:13,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:13,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:29:13,051 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:13,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1223374867, now seen corresponding path program 1 times [2020-12-22 10:29:13,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:13,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102373066] [2020-12-22 10:29:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:29:13,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102373066] [2020-12-22 10:29:13,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:29:13,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:29:13,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78971751] [2020-12-22 10:29:13,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:29:13,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:13,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:29:13,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:29:13,406 INFO L87 Difference]: Start difference. First operand 176518 states and 256728 transitions. Second operand 10 states.