/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.5.ufo.UNBOUNDED.pals+Problem12_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:56:41,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:56:41,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:56:41,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:56:41,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:56:41,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:56:41,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:56:41,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:56:41,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:56:41,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:56:41,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:56:41,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:56:41,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:56:41,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:56:41,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:56:41,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:56:41,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:56:41,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:56:41,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:56:41,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:56:41,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:56:41,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:56:41,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:56:41,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:56:41,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:56:41,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:56:41,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:56:41,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:56:41,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:56:41,512 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:56:41,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:56:41,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:56:41,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:56:41,514 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:56:41,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:56:41,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:56:41,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:56:41,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:56:41,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:56:41,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:56:41,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:56:41,516 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:56:41,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:56:41,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:56:41,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:56:41,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:56:41,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:56:41,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:56:41,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:56:41,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:56:41,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:56:41,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:56:41,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:56:41,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:56:41,519 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:56:41,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:56:41,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:56:41,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:56:41,937 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:56:41,938 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:56:41,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 09:56:42,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4812c5c11/aa7470c9ff384042b3065038ab8b07e6/FLAGaa8801992 [2020-12-22 09:56:43,167 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:56:43,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 09:56:43,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4812c5c11/aa7470c9ff384042b3065038ab8b07e6/FLAGaa8801992 [2020-12-22 09:56:43,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4812c5c11/aa7470c9ff384042b3065038ab8b07e6 [2020-12-22 09:56:43,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:56:43,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:56:43,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:56:43,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:56:43,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:56:43,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:56:43" (1/1) ... [2020-12-22 09:56:43,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c52fbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:43, skipping insertion in model container [2020-12-22 09:56:43,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:56:43" (1/1) ... [2020-12-22 09:56:43,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:56:43,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:56:44,155 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.5.ufo.UNBOUNDED.pals+Problem12_label03.c[11758,11771] [2020-12-22 09:56:44,194 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.5.ufo.UNBOUNDED.pals+Problem12_label03.c[13852,13865] [2020-12-22 09:56:45,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:56:45,184 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:56:45,267 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.5.ufo.UNBOUNDED.pals+Problem12_label03.c[11758,11771] [2020-12-22 09:56:45,275 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.5.ufo.UNBOUNDED.pals+Problem12_label03.c[13852,13865] [2020-12-22 09:56:46,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:56:46,113 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:56:46,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:46 WrapperNode [2020-12-22 09:56:46,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:56:46,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:56:46,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:56:46,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:56:46,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:46" (1/1) ... [2020-12-22 09:56:46,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:46" (1/1) ... [2020-12-22 09:56:46,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:56:46,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:56:46,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:56:46,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:56:46,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:46" (1/1) ... [2020-12-22 09:56:46,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:46" (1/1) ... [2020-12-22 09:56:46,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:46" (1/1) ... [2020-12-22 09:56:46,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:46" (1/1) ... [2020-12-22 09:56:47,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:46" (1/1) ... [2020-12-22 09:56:47,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:46" (1/1) ... [2020-12-22 09:56:47,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:46" (1/1) ... [2020-12-22 09:56:47,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:56:47,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:56:47,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:56:47,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:56:47,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:46" (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 09:56:47,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:56:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:56:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:56:47,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:56:53,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:56:53,062 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:56:53,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:56:53 BoogieIcfgContainer [2020-12-22 09:56:53,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:56:53,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:56:53,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:56:53,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:56:53,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:56:43" (1/3) ... [2020-12-22 09:56:53,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c15f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:56:53, skipping insertion in model container [2020-12-22 09:56:53,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:46" (2/3) ... [2020-12-22 09:56:53,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c15f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:56:53, skipping insertion in model container [2020-12-22 09:56:53,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:56:53" (3/3) ... [2020-12-22 09:56:53,081 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 09:56:53,089 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:56:53,096 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:56:53,117 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:56:53,179 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:56:53,184 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:56:53,184 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:56:53,184 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:56:53,184 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:56:53,185 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:56:53,185 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:56:53,185 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:56:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:56:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 09:56:53,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:53,241 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] [2020-12-22 09:56:53,241 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:53,248 INFO L82 PathProgramCache]: Analyzing trace with hash 576296581, now seen corresponding path program 1 times [2020-12-22 09:56:53,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:53,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330074288] [2020-12-22 09:56:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:53,544 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 09:56:53,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330074288] [2020-12-22 09:56:53,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:53,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:56:53,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650559449] [2020-12-22 09:56:53,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:53,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:53,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:53,573 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 3 states. [2020-12-22 09:56:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:59,794 INFO L93 Difference]: Finished difference Result 2536 states and 4878 transitions. [2020-12-22 09:56:59,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:59,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 09:56:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:59,836 INFO L225 Difference]: With dead ends: 2536 [2020-12-22 09:56:59,837 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:56:59,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:57:00,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1595. [2020-12-22 09:57:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1595 states. [2020-12-22 09:57:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2618 transitions. [2020-12-22 09:57:00,020 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2618 transitions. Word has length 20 [2020-12-22 09:57:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:00,021 INFO L481 AbstractCegarLoop]: Abstraction has 1595 states and 2618 transitions. [2020-12-22 09:57:00,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2618 transitions. [2020-12-22 09:57:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:57:00,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:00,027 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] [2020-12-22 09:57:00,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:57:00,027 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:00,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:57:00,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:00,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283494103] [2020-12-22 09:57:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:00,194 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 09:57:00,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283494103] [2020-12-22 09:57:00,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:00,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:57:00,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415225421] [2020-12-22 09:57:00,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:57:00,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:57:00,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:57:00,199 INFO L87 Difference]: Start difference. First operand 1595 states and 2618 transitions. Second operand 5 states. [2020-12-22 09:57:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:00,313 INFO L93 Difference]: Finished difference Result 1652 states and 2706 transitions. [2020-12-22 09:57:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:57:00,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:57:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:00,324 INFO L225 Difference]: With dead ends: 1652 [2020-12-22 09:57:00,324 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:57:00,326 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 09:57:00,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:57:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1595. [2020-12-22 09:57:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1595 states. [2020-12-22 09:57:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2587 transitions. [2020-12-22 09:57:00,373 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2587 transitions. Word has length 34 [2020-12-22 09:57:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:00,373 INFO L481 AbstractCegarLoop]: Abstraction has 1595 states and 2587 transitions. [2020-12-22 09:57:00,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:57:00,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2587 transitions. [2020-12-22 09:57:00,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:57:00,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:00,377 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] [2020-12-22 09:57:00,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:57:00,377 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:00,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:57:00,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:00,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671439537] [2020-12-22 09:57:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:00,573 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 09:57:00,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671439537] [2020-12-22 09:57:00,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:00,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:00,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152344449] [2020-12-22 09:57:00,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:00,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:00,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:00,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:00,583 INFO L87 Difference]: Start difference. First operand 1595 states and 2587 transitions. Second operand 3 states. [2020-12-22 09:57:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:00,633 INFO L93 Difference]: Finished difference Result 1695 states and 2745 transitions. [2020-12-22 09:57:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:00,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:57:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:00,644 INFO L225 Difference]: With dead ends: 1695 [2020-12-22 09:57:00,645 INFO L226 Difference]: Without dead ends: 1642 [2020-12-22 09:57:00,647 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 09:57:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-12-22 09:57:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2020-12-22 09:57:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-12-22 09:57:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2659 transitions. [2020-12-22 09:57:00,709 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2659 transitions. Word has length 64 [2020-12-22 09:57:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:00,710 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 2659 transitions. [2020-12-22 09:57:00,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2659 transitions. [2020-12-22 09:57:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:57:00,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:00,718 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] [2020-12-22 09:57:00,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:57:00,718 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:00,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:00,719 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:57:00,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:00,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55147720] [2020-12-22 09:57:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:00,876 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 09:57:00,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55147720] [2020-12-22 09:57:00,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:00,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652988705] [2020-12-22 09:57:00,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:00,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:00,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:00,879 INFO L87 Difference]: Start difference. First operand 1640 states and 2659 transitions. Second operand 7 states. [2020-12-22 09:57:01,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:01,204 INFO L93 Difference]: Finished difference Result 2620 states and 4219 transitions. [2020-12-22 09:57:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:57:01,204 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:57:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:01,223 INFO L225 Difference]: With dead ends: 2620 [2020-12-22 09:57:01,223 INFO L226 Difference]: Without dead ends: 2522 [2020-12-22 09:57:01,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:57:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2020-12-22 09:57:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 1736. [2020-12-22 09:57:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-12-22 09:57:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2810 transitions. [2020-12-22 09:57:01,289 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2810 transitions. Word has length 64 [2020-12-22 09:57:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:01,291 INFO L481 AbstractCegarLoop]: Abstraction has 1736 states and 2810 transitions. [2020-12-22 09:57:01,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2810 transitions. [2020-12-22 09:57:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:01,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:01,293 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] [2020-12-22 09:57:01,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:57:01,294 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:01,294 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:57:01,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:01,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862818046] [2020-12-22 09:57:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:01,458 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 09:57:01,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862818046] [2020-12-22 09:57:01,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:01,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:01,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908184339] [2020-12-22 09:57:01,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:01,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:01,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:01,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:01,462 INFO L87 Difference]: Start difference. First operand 1736 states and 2810 transitions. Second operand 3 states. [2020-12-22 09:57:01,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:01,531 INFO L93 Difference]: Finished difference Result 2102 states and 3386 transitions. [2020-12-22 09:57:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:01,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:01,544 INFO L225 Difference]: With dead ends: 2102 [2020-12-22 09:57:01,544 INFO L226 Difference]: Without dead ends: 1908 [2020-12-22 09:57:01,545 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 09:57:01,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2020-12-22 09:57:01,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1902. [2020-12-22 09:57:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 09:57:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3064 transitions. [2020-12-22 09:57:01,616 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3064 transitions. Word has length 66 [2020-12-22 09:57:01,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:01,619 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 3064 transitions. [2020-12-22 09:57:01,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:01,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3064 transitions. [2020-12-22 09:57:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:01,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:01,622 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] [2020-12-22 09:57:01,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:57:01,622 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:01,623 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:57:01,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:01,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437028985] [2020-12-22 09:57:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:01,900 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 09:57:01,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437028985] [2020-12-22 09:57:01,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:01,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:01,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681441090] [2020-12-22 09:57:01,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:01,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:01,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:01,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:01,903 INFO L87 Difference]: Start difference. First operand 1902 states and 3064 transitions. Second operand 7 states. [2020-12-22 09:57:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:02,165 INFO L93 Difference]: Finished difference Result 2264 states and 3626 transitions. [2020-12-22 09:57:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:02,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:57:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:02,177 INFO L225 Difference]: With dead ends: 2264 [2020-12-22 09:57:02,177 INFO L226 Difference]: Without dead ends: 1904 [2020-12-22 09:57:02,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:57:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-12-22 09:57:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1902. [2020-12-22 09:57:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 09:57:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3060 transitions. [2020-12-22 09:57:02,238 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3060 transitions. Word has length 66 [2020-12-22 09:57:02,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:02,239 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 3060 transitions. [2020-12-22 09:57:02,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:02,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3060 transitions. [2020-12-22 09:57:02,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:02,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:02,240 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] [2020-12-22 09:57:02,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:57:02,241 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:57:02,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:02,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304084837] [2020-12-22 09:57:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:02,373 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 09:57:02,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304084837] [2020-12-22 09:57:02,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:02,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:02,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117430834] [2020-12-22 09:57:02,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:02,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:02,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:02,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:02,377 INFO L87 Difference]: Start difference. First operand 1902 states and 3060 transitions. Second operand 3 states. [2020-12-22 09:57:02,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:02,449 INFO L93 Difference]: Finished difference Result 2574 states and 4094 transitions. [2020-12-22 09:57:02,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:02,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:02,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:02,463 INFO L225 Difference]: With dead ends: 2574 [2020-12-22 09:57:02,464 INFO L226 Difference]: Without dead ends: 2214 [2020-12-22 09:57:02,466 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 09:57:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2020-12-22 09:57:02,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2212. [2020-12-22 09:57:02,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2020-12-22 09:57:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3528 transitions. [2020-12-22 09:57:02,550 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3528 transitions. Word has length 66 [2020-12-22 09:57:02,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:02,550 INFO L481 AbstractCegarLoop]: Abstraction has 2212 states and 3528 transitions. [2020-12-22 09:57:02,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:02,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3528 transitions. [2020-12-22 09:57:02,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:02,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:02,552 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] [2020-12-22 09:57:02,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:57:02,552 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:57:02,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:02,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227208084] [2020-12-22 09:57:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:02,606 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 09:57:02,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227208084] [2020-12-22 09:57:02,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:02,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:02,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652508769] [2020-12-22 09:57:02,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:02,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:02,609 INFO L87 Difference]: Start difference. First operand 2212 states and 3528 transitions. Second operand 3 states. [2020-12-22 09:57:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:02,711 INFO L93 Difference]: Finished difference Result 3456 states and 5418 transitions. [2020-12-22 09:57:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:02,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:02,727 INFO L225 Difference]: With dead ends: 3456 [2020-12-22 09:57:02,727 INFO L226 Difference]: Without dead ends: 2786 [2020-12-22 09:57:02,730 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 09:57:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2020-12-22 09:57:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2784. [2020-12-22 09:57:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2784 states. [2020-12-22 09:57:02,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 4376 transitions. [2020-12-22 09:57:02,856 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 4376 transitions. Word has length 66 [2020-12-22 09:57:02,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:02,857 INFO L481 AbstractCegarLoop]: Abstraction has 2784 states and 4376 transitions. [2020-12-22 09:57:02,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:02,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 4376 transitions. [2020-12-22 09:57:02,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:02,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:02,858 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] [2020-12-22 09:57:02,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:57:02,859 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:02,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:02,859 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:57:02,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:02,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485163649] [2020-12-22 09:57:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:02,934 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 09:57:02,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485163649] [2020-12-22 09:57:02,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:02,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:02,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510900272] [2020-12-22 09:57:02,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:02,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:02,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:02,939 INFO L87 Difference]: Start difference. First operand 2784 states and 4376 transitions. Second operand 3 states. [2020-12-22 09:57:03,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:03,112 INFO L93 Difference]: Finished difference Result 5076 states and 7802 transitions. [2020-12-22 09:57:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:03,112 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:03,135 INFO L225 Difference]: With dead ends: 5076 [2020-12-22 09:57:03,135 INFO L226 Difference]: Without dead ends: 3834 [2020-12-22 09:57:03,139 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 09:57:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2020-12-22 09:57:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3832. [2020-12-22 09:57:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3832 states. [2020-12-22 09:57:03,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 5896 transitions. [2020-12-22 09:57:03,340 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 5896 transitions. Word has length 66 [2020-12-22 09:57:03,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:03,341 INFO L481 AbstractCegarLoop]: Abstraction has 3832 states and 5896 transitions. [2020-12-22 09:57:03,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 5896 transitions. [2020-12-22 09:57:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:57:03,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:03,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:03,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:57:03,349 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:57:03,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:03,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145237772] [2020-12-22 09:57:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:03,464 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 09:57:03,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145237772] [2020-12-22 09:57:03,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:03,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:57:03,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057566498] [2020-12-22 09:57:03,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:57:03,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:03,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:57:03,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:57:03,467 INFO L87 Difference]: Start difference. First operand 3832 states and 5896 transitions. Second operand 5 states. [2020-12-22 09:57:03,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:03,846 INFO L93 Difference]: Finished difference Result 5558 states and 8398 transitions. [2020-12-22 09:57:03,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:03,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:57:03,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:03,894 INFO L225 Difference]: With dead ends: 5558 [2020-12-22 09:57:03,894 INFO L226 Difference]: Without dead ends: 5556 [2020-12-22 09:57:03,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:57:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2020-12-22 09:57:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 3928. [2020-12-22 09:57:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-12-22 09:57:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5976 transitions. [2020-12-22 09:57:04,157 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5976 transitions. Word has length 67 [2020-12-22 09:57:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:04,158 INFO L481 AbstractCegarLoop]: Abstraction has 3928 states and 5976 transitions. [2020-12-22 09:57:04,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:57:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5976 transitions. [2020-12-22 09:57:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:57:04,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:04,159 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] [2020-12-22 09:57:04,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:57:04,160 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:04,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:57:04,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:04,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991672404] [2020-12-22 09:57:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:04,226 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 09:57:04,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991672404] [2020-12-22 09:57:04,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:04,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:04,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433737154] [2020-12-22 09:57:04,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:04,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:04,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:04,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:04,230 INFO L87 Difference]: Start difference. First operand 3928 states and 5976 transitions. Second operand 3 states. [2020-12-22 09:57:04,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:04,489 INFO L93 Difference]: Finished difference Result 6367 states and 9566 transitions. [2020-12-22 09:57:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:04,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:57:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:04,502 INFO L225 Difference]: With dead ends: 6367 [2020-12-22 09:57:04,503 INFO L226 Difference]: Without dead ends: 5020 [2020-12-22 09:57:04,507 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 09:57:04,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2020-12-22 09:57:04,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 5018. [2020-12-22 09:57:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:57:04,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7530 transitions. [2020-12-22 09:57:04,811 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7530 transitions. Word has length 68 [2020-12-22 09:57:04,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:04,811 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7530 transitions. [2020-12-22 09:57:04,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:04,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7530 transitions. [2020-12-22 09:57:04,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 09:57:04,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:04,815 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:57:04,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:57:04,815 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:04,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:04,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1080984668, now seen corresponding path program 1 times [2020-12-22 09:57:04,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:04,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12700250] [2020-12-22 09:57:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:04,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12700250] [2020-12-22 09:57:04,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565387099] [2020-12-22 09:57:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:05,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 09:57:05,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:05,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:57:05,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 09:57:05,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546390399] [2020-12-22 09:57:05,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:05,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:05,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:05,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:57:05,463 INFO L87 Difference]: Start difference. First operand 5018 states and 7530 transitions. Second operand 3 states. [2020-12-22 09:57:11,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:11,971 INFO L93 Difference]: Finished difference Result 8024 states and 12457 transitions. [2020-12-22 09:57:11,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:11,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 09:57:11,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:11,986 INFO L225 Difference]: With dead ends: 8024 [2020-12-22 09:57:11,986 INFO L226 Difference]: Without dead ends: 6520 [2020-12-22 09:57:11,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:57:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2020-12-22 09:57:12,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 6520. [2020-12-22 09:57:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6520 states. [2020-12-22 09:57:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6520 states to 6520 states and 9350 transitions. [2020-12-22 09:57:12,331 INFO L78 Accepts]: Start accepts. Automaton has 6520 states and 9350 transitions. Word has length 91 [2020-12-22 09:57:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:12,332 INFO L481 AbstractCegarLoop]: Abstraction has 6520 states and 9350 transitions. [2020-12-22 09:57:12,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 6520 states and 9350 transitions. [2020-12-22 09:57:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:12,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:12,336 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] [2020-12-22 09:57:12,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 09:57:12,552 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:12,553 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:57:12,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:12,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991332630] [2020-12-22 09:57:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:57:12,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991332630] [2020-12-22 09:57:12,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:12,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:12,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685697505] [2020-12-22 09:57:12,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:12,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:12,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:12,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:12,708 INFO L87 Difference]: Start difference. First operand 6520 states and 9350 transitions. Second operand 7 states. [2020-12-22 09:57:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:13,942 INFO L93 Difference]: Finished difference Result 24596 states and 35452 transitions. [2020-12-22 09:57:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:13,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:13,980 INFO L225 Difference]: With dead ends: 24596 [2020-12-22 09:57:13,980 INFO L226 Difference]: Without dead ends: 21122 [2020-12-22 09:57:13,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21122 states. [2020-12-22 09:57:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21122 to 9992. [2020-12-22 09:57:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9992 states. [2020-12-22 09:57:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9992 states to 9992 states and 14326 transitions. [2020-12-22 09:57:14,845 INFO L78 Accepts]: Start accepts. Automaton has 9992 states and 14326 transitions. Word has length 94 [2020-12-22 09:57:14,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:14,845 INFO L481 AbstractCegarLoop]: Abstraction has 9992 states and 14326 transitions. [2020-12-22 09:57:14,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 9992 states and 14326 transitions. [2020-12-22 09:57:14,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:14,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:14,850 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:57:14,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:57:14,850 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:14,851 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:57:14,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:14,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661099901] [2020-12-22 09:57:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:57:14,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661099901] [2020-12-22 09:57:14,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:14,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:14,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023264219] [2020-12-22 09:57:14,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:14,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:14,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:14,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:14,991 INFO L87 Difference]: Start difference. First operand 9992 states and 14326 transitions. Second operand 7 states. [2020-12-22 09:57:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:16,158 INFO L93 Difference]: Finished difference Result 28068 states and 40428 transitions. [2020-12-22 09:57:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:16,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:16,214 INFO L225 Difference]: With dead ends: 28068 [2020-12-22 09:57:16,214 INFO L226 Difference]: Without dead ends: 24594 [2020-12-22 09:57:16,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24594 states. [2020-12-22 09:57:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24594 to 15208. [2020-12-22 09:57:17,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15208 states. [2020-12-22 09:57:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15208 states to 15208 states and 21750 transitions. [2020-12-22 09:57:17,081 INFO L78 Accepts]: Start accepts. Automaton has 15208 states and 21750 transitions. Word has length 94 [2020-12-22 09:57:17,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:17,082 INFO L481 AbstractCegarLoop]: Abstraction has 15208 states and 21750 transitions. [2020-12-22 09:57:17,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 15208 states and 21750 transitions. [2020-12-22 09:57:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:17,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:17,087 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:57:17,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:57:17,087 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:17,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:17,088 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:57:17,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:17,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911367333] [2020-12-22 09:57:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:57:17,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911367333] [2020-12-22 09:57:17,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:17,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:17,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792469579] [2020-12-22 09:57:17,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:17,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:17,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:17,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:17,209 INFO L87 Difference]: Start difference. First operand 15208 states and 21750 transitions. Second operand 7 states. [2020-12-22 09:57:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:18,431 INFO L93 Difference]: Finished difference Result 31540 states and 45404 transitions. [2020-12-22 09:57:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:18,431 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:18,474 INFO L225 Difference]: With dead ends: 31540 [2020-12-22 09:57:18,475 INFO L226 Difference]: Without dead ends: 28066 [2020-12-22 09:57:18,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:18,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28066 states. [2020-12-22 09:57:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28066 to 18680. [2020-12-22 09:57:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18680 states. [2020-12-22 09:57:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18680 states to 18680 states and 26726 transitions. [2020-12-22 09:57:19,766 INFO L78 Accepts]: Start accepts. Automaton has 18680 states and 26726 transitions. Word has length 94 [2020-12-22 09:57:19,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:19,766 INFO L481 AbstractCegarLoop]: Abstraction has 18680 states and 26726 transitions. [2020-12-22 09:57:19,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 18680 states and 26726 transitions. [2020-12-22 09:57:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:19,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:19,771 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:57:19,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:57:19,772 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:19,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:57:19,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:19,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724857754] [2020-12-22 09:57:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:57:19,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724857754] [2020-12-22 09:57:19,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:19,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:19,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030430345] [2020-12-22 09:57:19,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:19,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:19,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:19,892 INFO L87 Difference]: Start difference. First operand 18680 states and 26726 transitions. Second operand 7 states. [2020-12-22 09:57:21,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:21,962 INFO L93 Difference]: Finished difference Result 35012 states and 50380 transitions. [2020-12-22 09:57:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:21,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:21,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:22,003 INFO L225 Difference]: With dead ends: 35012 [2020-12-22 09:57:22,003 INFO L226 Difference]: Without dead ends: 31538 [2020-12-22 09:57:22,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:22,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31538 states. [2020-12-22 09:57:23,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31538 to 22152. [2020-12-22 09:57:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22152 states. [2020-12-22 09:57:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22152 states to 22152 states and 31702 transitions. [2020-12-22 09:57:23,276 INFO L78 Accepts]: Start accepts. Automaton has 22152 states and 31702 transitions. Word has length 94 [2020-12-22 09:57:23,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:23,276 INFO L481 AbstractCegarLoop]: Abstraction has 22152 states and 31702 transitions. [2020-12-22 09:57:23,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 22152 states and 31702 transitions. [2020-12-22 09:57:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:57:23,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:23,284 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:57:23,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:57:23,284 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:23,285 INFO L82 PathProgramCache]: Analyzing trace with hash 996608486, now seen corresponding path program 1 times [2020-12-22 09:57:23,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:23,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107055663] [2020-12-22 09:57:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:23,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107055663] [2020-12-22 09:57:23,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:23,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:57:23,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056369693] [2020-12-22 09:57:23,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:23,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:23,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:23,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:23,355 INFO L87 Difference]: Start difference. First operand 22152 states and 31702 transitions. Second operand 3 states. [2020-12-22 09:57:30,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:30,714 INFO L93 Difference]: Finished difference Result 28162 states and 40269 transitions. [2020-12-22 09:57:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:30,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 09:57:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:30,742 INFO L225 Difference]: With dead ends: 28162 [2020-12-22 09:57:30,743 INFO L226 Difference]: Without dead ends: 25156 [2020-12-22 09:57:30,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25156 states. [2020-12-22 09:57:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25156 to 25156. [2020-12-22 09:57:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25156 states. [2020-12-22 09:57:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25156 states to 25156 states and 35018 transitions. [2020-12-22 09:57:32,057 INFO L78 Accepts]: Start accepts. Automaton has 25156 states and 35018 transitions. Word has length 95 [2020-12-22 09:57:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:32,058 INFO L481 AbstractCegarLoop]: Abstraction has 25156 states and 35018 transitions. [2020-12-22 09:57:32,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:32,058 INFO L276 IsEmpty]: Start isEmpty. Operand 25156 states and 35018 transitions. [2020-12-22 09:57:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:57:32,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:32,065 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:32,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:57:32,065 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:32,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:57:32,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:32,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696420706] [2020-12-22 09:57:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:32,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696420706] [2020-12-22 09:57:32,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:32,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:32,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389249711] [2020-12-22 09:57:32,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:32,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:32,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:32,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:32,141 INFO L87 Difference]: Start difference. First operand 25156 states and 35018 transitions. Second operand 3 states. [2020-12-22 09:57:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:32,887 INFO L93 Difference]: Finished difference Result 38565 states and 54415 transitions. [2020-12-22 09:57:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:32,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:57:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:32,910 INFO L225 Difference]: With dead ends: 38565 [2020-12-22 09:57:32,911 INFO L226 Difference]: Without dead ends: 19459 [2020-12-22 09:57:32,930 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 09:57:32,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19459 states. [2020-12-22 09:57:33,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19459 to 19457. [2020-12-22 09:57:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19457 states. [2020-12-22 09:57:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19457 states to 19457 states and 26860 transitions. [2020-12-22 09:57:33,868 INFO L78 Accepts]: Start accepts. Automaton has 19457 states and 26860 transitions. Word has length 96 [2020-12-22 09:57:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:33,868 INFO L481 AbstractCegarLoop]: Abstraction has 19457 states and 26860 transitions. [2020-12-22 09:57:33,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19457 states and 26860 transitions. [2020-12-22 09:57:33,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:57:33,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:33,874 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:57:33,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:57:33,874 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:33,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:33,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:57:33,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:33,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617340640] [2020-12-22 09:57:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:57:34,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617340640] [2020-12-22 09:57:34,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:34,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:34,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128734332] [2020-12-22 09:57:34,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:34,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:34,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:34,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:34,005 INFO L87 Difference]: Start difference. First operand 19457 states and 26860 transitions. Second operand 7 states. [2020-12-22 09:57:35,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:35,936 INFO L93 Difference]: Finished difference Result 31629 states and 44466 transitions. [2020-12-22 09:57:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:35,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:57:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:35,966 INFO L225 Difference]: With dead ends: 31629 [2020-12-22 09:57:35,966 INFO L226 Difference]: Without dead ends: 29195 [2020-12-22 09:57:35,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29195 states. [2020-12-22 09:57:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29195 to 21889. [2020-12-22 09:57:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21889 states. [2020-12-22 09:57:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21889 states to 21889 states and 30348 transitions. [2020-12-22 09:57:36,954 INFO L78 Accepts]: Start accepts. Automaton has 21889 states and 30348 transitions. Word has length 96 [2020-12-22 09:57:36,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:36,954 INFO L481 AbstractCegarLoop]: Abstraction has 21889 states and 30348 transitions. [2020-12-22 09:57:36,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 21889 states and 30348 transitions. [2020-12-22 09:57:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:36,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:36,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:36,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:57:36,960 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:57:36,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:36,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748739522] [2020-12-22 09:57:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:37,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748739522] [2020-12-22 09:57:37,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:37,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:37,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969068068] [2020-12-22 09:57:37,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:37,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:37,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:37,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:37,066 INFO L87 Difference]: Start difference. First operand 21889 states and 30348 transitions. Second operand 3 states. [2020-12-22 09:57:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:37,917 INFO L93 Difference]: Finished difference Result 29797 states and 41686 transitions. [2020-12-22 09:57:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:37,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:37,932 INFO L225 Difference]: With dead ends: 29797 [2020-12-22 09:57:37,932 INFO L226 Difference]: Without dead ends: 13987 [2020-12-22 09:57:37,946 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 09:57:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13987 states. [2020-12-22 09:57:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13987 to 13985. [2020-12-22 09:57:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13985 states. [2020-12-22 09:57:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13985 states to 13985 states and 18908 transitions. [2020-12-22 09:57:38,505 INFO L78 Accepts]: Start accepts. Automaton has 13985 states and 18908 transitions. Word has length 97 [2020-12-22 09:57:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:38,505 INFO L481 AbstractCegarLoop]: Abstraction has 13985 states and 18908 transitions. [2020-12-22 09:57:38,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:38,505 INFO L276 IsEmpty]: Start isEmpty. Operand 13985 states and 18908 transitions. [2020-12-22 09:57:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:38,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:38,509 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:57:38,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:57:38,509 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:38,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:57:38,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:38,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452114623] [2020-12-22 09:57:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:38,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452114623] [2020-12-22 09:57:38,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:38,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:38,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317576123] [2020-12-22 09:57:38,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:38,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:38,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:38,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:38,572 INFO L87 Difference]: Start difference. First operand 13985 states and 18908 transitions. Second operand 3 states. [2020-12-22 09:57:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:38,872 INFO L93 Difference]: Finished difference Result 17941 states and 24526 transitions. [2020-12-22 09:57:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:38,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:38,882 INFO L225 Difference]: With dead ends: 17941 [2020-12-22 09:57:38,882 INFO L226 Difference]: Without dead ends: 10035 [2020-12-22 09:57:38,890 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 09:57:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10035 states. [2020-12-22 09:57:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10035 to 10033. [2020-12-22 09:57:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10033 states. [2020-12-22 09:57:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10033 states to 10033 states and 13240 transitions. [2020-12-22 09:57:39,160 INFO L78 Accepts]: Start accepts. Automaton has 10033 states and 13240 transitions. Word has length 97 [2020-12-22 09:57:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:39,161 INFO L481 AbstractCegarLoop]: Abstraction has 10033 states and 13240 transitions. [2020-12-22 09:57:39,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 10033 states and 13240 transitions. [2020-12-22 09:57:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:39,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:39,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:39,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:57:39,163 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:39,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:57:39,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:39,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705323949] [2020-12-22 09:57:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:39,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705323949] [2020-12-22 09:57:39,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:39,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:39,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762961335] [2020-12-22 09:57:39,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:39,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:39,230 INFO L87 Difference]: Start difference. First operand 10033 states and 13240 transitions. Second operand 3 states. [2020-12-22 09:57:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:39,431 INFO L93 Difference]: Finished difference Result 12013 states and 16024 transitions. [2020-12-22 09:57:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:39,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:39,443 INFO L225 Difference]: With dead ends: 12013 [2020-12-22 09:57:39,443 INFO L226 Difference]: Without dead ends: 8059 [2020-12-22 09:57:39,448 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 09:57:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2020-12-22 09:57:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 8057. [2020-12-22 09:57:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8057 states. [2020-12-22 09:57:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8057 states to 8057 states and 10432 transitions. [2020-12-22 09:57:39,687 INFO L78 Accepts]: Start accepts. Automaton has 8057 states and 10432 transitions. Word has length 97 [2020-12-22 09:57:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:39,687 INFO L481 AbstractCegarLoop]: Abstraction has 8057 states and 10432 transitions. [2020-12-22 09:57:39,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:39,687 INFO L276 IsEmpty]: Start isEmpty. Operand 8057 states and 10432 transitions. [2020-12-22 09:57:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:39,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:39,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:39,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:57:39,690 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:39,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:39,691 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:57:39,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:39,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224165424] [2020-12-22 09:57:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:40,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224165424] [2020-12-22 09:57:40,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15621017] [2020-12-22 09:57:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:40,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:57:40,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:57:40,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:40,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:57:40,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716039464] [2020-12-22 09:57:40,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:57:40,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:40,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:57:40,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:57:40,463 INFO L87 Difference]: Start difference. First operand 8057 states and 10432 transitions. Second operand 16 states. [2020-12-22 09:57:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:44,332 INFO L93 Difference]: Finished difference Result 19128 states and 25451 transitions. [2020-12-22 09:57:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:57:44,332 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:57:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:44,365 INFO L225 Difference]: With dead ends: 19128 [2020-12-22 09:57:44,365 INFO L226 Difference]: Without dead ends: 17150 [2020-12-22 09:57:44,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:57:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17150 states. [2020-12-22 09:57:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17150 to 13779. [2020-12-22 09:57:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13779 states. [2020-12-22 09:57:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13779 states to 13779 states and 17994 transitions. [2020-12-22 09:57:45,470 INFO L78 Accepts]: Start accepts. Automaton has 13779 states and 17994 transitions. Word has length 97 [2020-12-22 09:57:45,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:45,470 INFO L481 AbstractCegarLoop]: Abstraction has 13779 states and 17994 transitions. [2020-12-22 09:57:45,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:57:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 13779 states and 17994 transitions. [2020-12-22 09:57:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:57:45,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:45,474 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:57:45,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:57:45,690 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:45,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:57:45,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:45,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510728795] [2020-12-22 09:57:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:46,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510728795] [2020-12-22 09:57:46,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656323369] [2020-12-22 09:57:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:46,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:57:46,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:46,376 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:57:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:46,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:46,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:57:46,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160982751] [2020-12-22 09:57:46,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:57:46,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:46,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:57:46,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:57:46,741 INFO L87 Difference]: Start difference. First operand 13779 states and 17994 transitions. Second operand 22 states. [2020-12-22 09:57:48,828 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 09:57:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:51,539 INFO L93 Difference]: Finished difference Result 44580 states and 59060 transitions. [2020-12-22 09:57:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:57:51,539 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:57:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:51,604 INFO L225 Difference]: With dead ends: 44580 [2020-12-22 09:57:51,604 INFO L226 Difference]: Without dead ends: 38077 [2020-12-22 09:57:51,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:57:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38077 states. [2020-12-22 09:57:53,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38077 to 26282. [2020-12-22 09:57:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26282 states. [2020-12-22 09:57:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26282 states to 26282 states and 34533 transitions. [2020-12-22 09:57:53,843 INFO L78 Accepts]: Start accepts. Automaton has 26282 states and 34533 transitions. Word has length 98 [2020-12-22 09:57:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:53,843 INFO L481 AbstractCegarLoop]: Abstraction has 26282 states and 34533 transitions. [2020-12-22 09:57:53,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:57:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 26282 states and 34533 transitions. [2020-12-22 09:57:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:57:53,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:53,846 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:57:54,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:57:54,061 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:54,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:54,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:57:54,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:54,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085738774] [2020-12-22 09:57:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:54,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085738774] [2020-12-22 09:57:54,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47734860] [2020-12-22 09:57:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:54,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:57:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:54,643 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:57:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:54,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:54,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:57:54,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910543796] [2020-12-22 09:57:54,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:57:54,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:54,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:57:54,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:57:54,958 INFO L87 Difference]: Start difference. First operand 26282 states and 34533 transitions. Second operand 17 states. [2020-12-22 09:58:21,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:21,079 INFO L93 Difference]: Finished difference Result 220837 states and 292343 transitions. [2020-12-22 09:58:21,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:58:21,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 09:58:21,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:21,606 INFO L225 Difference]: With dead ends: 220837 [2020-12-22 09:58:21,606 INFO L226 Difference]: Without dead ends: 201280 [2020-12-22 09:58:21,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 09:58:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201280 states. [2020-12-22 09:58:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201280 to 116555. [2020-12-22 09:58:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116555 states. [2020-12-22 09:58:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116555 states to 116555 states and 151916 transitions. [2020-12-22 09:58:34,787 INFO L78 Accepts]: Start accepts. Automaton has 116555 states and 151916 transitions. Word has length 98 [2020-12-22 09:58:34,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:34,787 INFO L481 AbstractCegarLoop]: Abstraction has 116555 states and 151916 transitions. [2020-12-22 09:58:34,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:58:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 116555 states and 151916 transitions. [2020-12-22 09:58:34,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:34,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:34,791 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:58:34,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:58:34,995 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:34,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 09:58:34,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:34,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961913087] [2020-12-22 09:58:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:58:35,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961913087] [2020-12-22 09:58:35,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:35,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:58:35,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566052426] [2020-12-22 09:58:35,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:58:35,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:58:35,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:58:35,082 INFO L87 Difference]: Start difference. First operand 116555 states and 151916 transitions. Second operand 6 states. [2020-12-22 09:58:46,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:46,250 INFO L93 Difference]: Finished difference Result 217000 states and 283697 transitions. [2020-12-22 09:58:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:58:46,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:58:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:46,462 INFO L225 Difference]: With dead ends: 217000 [2020-12-22 09:58:46,462 INFO L226 Difference]: Without dead ends: 106696 [2020-12-22 09:58:46,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:58:46,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106696 states. [2020-12-22 09:58:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106696 to 106696. [2020-12-22 09:58:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106696 states. [2020-12-22 09:58:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106696 states to 106696 states and 138155 transitions. [2020-12-22 09:58:57,881 INFO L78 Accepts]: Start accepts. Automaton has 106696 states and 138155 transitions. Word has length 98 [2020-12-22 09:58:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:57,881 INFO L481 AbstractCegarLoop]: Abstraction has 106696 states and 138155 transitions. [2020-12-22 09:58:57,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:58:57,882 INFO L276 IsEmpty]: Start isEmpty. Operand 106696 states and 138155 transitions. [2020-12-22 09:58:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:57,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:57,885 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:58:57,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:58:57,886 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:57,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:57,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 09:58:57,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:57,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49307001] [2020-12-22 09:58:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:58:57,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49307001] [2020-12-22 09:58:57,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:57,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:58:57,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575630465] [2020-12-22 09:58:57,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:58:57,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:57,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:58:57,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:58:57,998 INFO L87 Difference]: Start difference. First operand 106696 states and 138155 transitions. Second operand 6 states. [2020-12-22 09:59:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:07,119 INFO L93 Difference]: Finished difference Result 180234 states and 233606 transitions. [2020-12-22 09:59:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:07,119 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:59:07,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:07,220 INFO L225 Difference]: With dead ends: 180234 [2020-12-22 09:59:07,220 INFO L226 Difference]: Without dead ends: 79955 [2020-12-22 09:59:07,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79955 states. [2020-12-22 09:59:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79955 to 79955. [2020-12-22 09:59:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79955 states. [2020-12-22 09:59:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79955 states to 79955 states and 102083 transitions. [2020-12-22 09:59:15,764 INFO L78 Accepts]: Start accepts. Automaton has 79955 states and 102083 transitions. Word has length 98 [2020-12-22 09:59:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:15,764 INFO L481 AbstractCegarLoop]: Abstraction has 79955 states and 102083 transitions. [2020-12-22 09:59:15,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 79955 states and 102083 transitions. [2020-12-22 09:59:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:15,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:15,767 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:59:15,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:59:15,768 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:15,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 09:59:15,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:15,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287429868] [2020-12-22 09:59:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:59:15,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287429868] [2020-12-22 09:59:15,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:15,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:15,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952024198] [2020-12-22 09:59:15,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:15,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:15,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:15,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:15,849 INFO L87 Difference]: Start difference. First operand 79955 states and 102083 transitions. Second operand 6 states. [2020-12-22 09:59:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:22,734 INFO L93 Difference]: Finished difference Result 135745 states and 173747 transitions. [2020-12-22 09:59:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:22,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:59:22,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:22,805 INFO L225 Difference]: With dead ends: 135745 [2020-12-22 09:59:22,805 INFO L226 Difference]: Without dead ends: 61925 [2020-12-22 09:59:22,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61925 states. [2020-12-22 09:59:29,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61925 to 61925. [2020-12-22 09:59:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61925 states. [2020-12-22 09:59:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61925 states to 61925 states and 78777 transitions. [2020-12-22 09:59:29,570 INFO L78 Accepts]: Start accepts. Automaton has 61925 states and 78777 transitions. Word has length 98 [2020-12-22 09:59:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:29,570 INFO L481 AbstractCegarLoop]: Abstraction has 61925 states and 78777 transitions. [2020-12-22 09:59:29,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 61925 states and 78777 transitions. [2020-12-22 09:59:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 09:59:29,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:29,573 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:59:29,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 09:59:29,574 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:29,575 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 09:59:29,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:29,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139454147] [2020-12-22 09:59:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:59:29,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139454147] [2020-12-22 09:59:29,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:29,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:29,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768076722] [2020-12-22 09:59:29,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:29,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:29,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:29,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:29,658 INFO L87 Difference]: Start difference. First operand 61925 states and 78777 transitions. Second operand 6 states. [2020-12-22 09:59:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:35,671 INFO L93 Difference]: Finished difference Result 104979 states and 133680 transitions. [2020-12-22 09:59:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:35,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 09:59:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:35,730 INFO L225 Difference]: With dead ends: 104979 [2020-12-22 09:59:35,730 INFO L226 Difference]: Without dead ends: 49191 [2020-12-22 09:59:35,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:35,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49191 states. [2020-12-22 09:59:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49191 to 49191. [2020-12-22 09:59:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49191 states. [2020-12-22 09:59:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49191 states to 49191 states and 62020 transitions. [2020-12-22 09:59:41,487 INFO L78 Accepts]: Start accepts. Automaton has 49191 states and 62020 transitions. Word has length 99 [2020-12-22 09:59:41,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:41,487 INFO L481 AbstractCegarLoop]: Abstraction has 49191 states and 62020 transitions. [2020-12-22 09:59:41,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 49191 states and 62020 transitions. [2020-12-22 09:59:41,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 09:59:41,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:41,491 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:59:41,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 09:59:41,491 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:41,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:41,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 09:59:41,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:41,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682349533] [2020-12-22 09:59:41,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:41,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682349533] [2020-12-22 09:59:41,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153011871] [2020-12-22 09:59:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:59:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:41,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:59:41,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:42,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:59:42,551 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 09:59:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:43,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:43,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 09:59:43,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754601978] [2020-12-22 09:59:43,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 09:59:43,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:43,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 09:59:43,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 09:59:43,204 INFO L87 Difference]: Start difference. First operand 49191 states and 62020 transitions. Second operand 20 states. [2020-12-22 09:59:44,139 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 09:59:44,653 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 09:59:45,610 WARN L197 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 09:59:46,277 WARN L197 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 09:59:46,890 WARN L197 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:47,742 WARN L197 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:48,592 WARN L197 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:59:49,255 WARN L197 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 09:59:50,109 WARN L197 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:59:50,793 WARN L197 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 09:59:51,575 WARN L197 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:59:52,341 WARN L197 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:59:53,443 WARN L197 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:59:54,560 WARN L197 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:59:55,405 WARN L197 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:59:56,695 WARN L197 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:00:00,802 WARN L197 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:00:01,796 WARN L197 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 10:00:03,040 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:03,678 WARN L197 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:00:05,122 WARN L197 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 10:00:05,637 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:06,140 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:00:06,687 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:07,531 WARN L197 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 10:00:08,037 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:09,707 WARN L197 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 10:00:10,591 WARN L197 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:11,318 WARN L197 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 10:00:11,947 WARN L197 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:00:13,314 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:14,012 WARN L197 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:00:15,220 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:16,011 WARN L197 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:00:16,576 WARN L197 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:20,561 WARN L197 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 10:00:22,258 WARN L197 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 10:00:23,221 WARN L197 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:00:23,742 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:24,237 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:00:25,015 WARN L197 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 10:00:25,499 WARN L197 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:26,238 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:00:26,619 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 10:00:27,228 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:00:27,569 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 80