/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/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:20:31,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:20:31,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:20:31,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:20:31,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:20:31,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:20:31,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:20:31,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:20:31,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:20:31,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:20:31,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:20:31,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:20:31,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:20:31,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:20:31,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:20:31,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:20:31,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:20:31,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:20:31,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:20:31,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:20:31,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:20:31,537 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:20:31,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:20:31,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:20:31,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:20:31,543 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:20:31,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:20:31,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:20:31,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:20:31,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:20:31,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:20:31,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:20:31,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:20:31,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:20:31,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:20:31,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:20:31,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:20:31,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:20:31,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:20:31,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:20:31,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:20:31,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:20:31,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:20:31,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:20:31,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:20:31,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:20:31,549 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:20:32,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:20:32,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:20:32,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:20:32,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:20:32,124 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:20:32,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c [2020-12-22 07:20:32,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f363e544/83f835708d37496aa1da15a694939065/FLAG3f69df429 [2020-12-22 07:20:32,909 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:20:32,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c [2020-12-22 07:20:32,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f363e544/83f835708d37496aa1da15a694939065/FLAG3f69df429 [2020-12-22 07:20:33,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f363e544/83f835708d37496aa1da15a694939065 [2020-12-22 07:20:33,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:20:33,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:20:33,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:20:33,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:20:33,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:20:33,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:33" (1/1) ... [2020-12-22 07:20:33,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2e3c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33, skipping insertion in model container [2020-12-22 07:20:33,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:33" (1/1) ... [2020-12-22 07:20:33,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:20:33,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:20:33,720 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/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c[12762,12775] [2020-12-22 07:20:33,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:20:33,743 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:20:33,809 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/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c[12762,12775] [2020-12-22 07:20:33,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:20:33,833 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:20:33,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33 WrapperNode [2020-12-22 07:20:33,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:20:33,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:20:33,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:20:33,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:20:33,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33" (1/1) ... [2020-12-22 07:20:33,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33" (1/1) ... [2020-12-22 07:20:33,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:20:33,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:20:33,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:20:33,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:20:33,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33" (1/1) ... [2020-12-22 07:20:33,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33" (1/1) ... [2020-12-22 07:20:33,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33" (1/1) ... [2020-12-22 07:20:33,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33" (1/1) ... [2020-12-22 07:20:33,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33" (1/1) ... [2020-12-22 07:20:33,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33" (1/1) ... [2020-12-22 07:20:33,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33" (1/1) ... [2020-12-22 07:20:33,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:20:33,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:20:33,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:20:33,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:20:33,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33" (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 07:20:34,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:20:34,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:20:34,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:20:34,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:20:35,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:20:35,219 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 07:20:35,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:35 BoogieIcfgContainer [2020-12-22 07:20:35,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:20:35,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:20:35,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:20:35,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:20:35,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:20:33" (1/3) ... [2020-12-22 07:20:35,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5f7f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:35, skipping insertion in model container [2020-12-22 07:20:35,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:33" (2/3) ... [2020-12-22 07:20:35,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5f7f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:35, skipping insertion in model container [2020-12-22 07:20:35,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:35" (3/3) ... [2020-12-22 07:20:35,233 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c [2020-12-22 07:20:35,240 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:20:35,246 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:20:35,270 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:20:35,304 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:20:35,304 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:20:35,305 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:20:35,305 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:20:35,305 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:20:35,305 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:20:35,305 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:20:35,305 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:20:35,326 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states. [2020-12-22 07:20:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:20:35,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:35,338 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] [2020-12-22 07:20:35,339 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:35,347 INFO L82 PathProgramCache]: Analyzing trace with hash -306716250, now seen corresponding path program 1 times [2020-12-22 07:20:35,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:35,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305808424] [2020-12-22 07:20:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:35,650 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 07:20:35,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305808424] [2020-12-22 07:20:35,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:35,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:20:35,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616167575] [2020-12-22 07:20:35,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:20:35,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:35,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:20:35,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:20:35,681 INFO L87 Difference]: Start difference. First operand 131 states. Second operand 2 states. [2020-12-22 07:20:35,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:35,718 INFO L93 Difference]: Finished difference Result 206 states and 352 transitions. [2020-12-22 07:20:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:20:35,720 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:20:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:35,734 INFO L225 Difference]: With dead ends: 206 [2020-12-22 07:20:35,735 INFO L226 Difference]: Without dead ends: 127 [2020-12-22 07:20:35,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:20:35,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-22 07:20:35,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-12-22 07:20:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 07:20:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 220 transitions. [2020-12-22 07:20:35,799 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 220 transitions. Word has length 37 [2020-12-22 07:20:35,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:35,800 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 220 transitions. [2020-12-22 07:20:35,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:20:35,800 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 220 transitions. [2020-12-22 07:20:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:20:35,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:35,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:35,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:20:35,804 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1124364700, now seen corresponding path program 1 times [2020-12-22 07:20:35,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:35,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415641623] [2020-12-22 07:20:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:36,038 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 07:20:36,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415641623] [2020-12-22 07:20:36,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:36,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:20:36,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865075454] [2020-12-22 07:20:36,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:20:36,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:36,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:20:36,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:36,047 INFO L87 Difference]: Start difference. First operand 127 states and 220 transitions. Second operand 5 states. [2020-12-22 07:20:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:36,292 INFO L93 Difference]: Finished difference Result 271 states and 460 transitions. [2020-12-22 07:20:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:20:36,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:20:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:36,296 INFO L225 Difference]: With dead ends: 271 [2020-12-22 07:20:36,297 INFO L226 Difference]: Without dead ends: 197 [2020-12-22 07:20:36,299 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 07:20:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-22 07:20:36,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2020-12-22 07:20:36,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 07:20:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 193 transitions. [2020-12-22 07:20:36,316 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 193 transitions. Word has length 37 [2020-12-22 07:20:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:36,317 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 193 transitions. [2020-12-22 07:20:36,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:20:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 193 transitions. [2020-12-22 07:20:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:20:36,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:36,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:36,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:20:36,321 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:36,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:36,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1313145683, now seen corresponding path program 1 times [2020-12-22 07:20:36,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:36,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702835021] [2020-12-22 07:20:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:36,555 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 07:20:36,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702835021] [2020-12-22 07:20:36,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:36,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:36,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565688068] [2020-12-22 07:20:36,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:36,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:36,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:36,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:36,559 INFO L87 Difference]: Start difference. First operand 127 states and 193 transitions. Second operand 3 states. [2020-12-22 07:20:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:36,613 INFO L93 Difference]: Finished difference Result 258 states and 412 transitions. [2020-12-22 07:20:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:36,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:20:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:36,617 INFO L225 Difference]: With dead ends: 258 [2020-12-22 07:20:36,618 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 07:20:36,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:20:36,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 07:20:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-12-22 07:20:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-22 07:20:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 288 transitions. [2020-12-22 07:20:36,640 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 288 transitions. Word has length 63 [2020-12-22 07:20:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:36,640 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 288 transitions. [2020-12-22 07:20:36,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 288 transitions. [2020-12-22 07:20:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:20:36,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:36,644 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] [2020-12-22 07:20:36,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:20:36,645 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:36,646 INFO L82 PathProgramCache]: Analyzing trace with hash -255493166, now seen corresponding path program 1 times [2020-12-22 07:20:36,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:36,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794562500] [2020-12-22 07:20:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:36,752 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 07:20:36,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794562500] [2020-12-22 07:20:36,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:36,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:36,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246032029] [2020-12-22 07:20:36,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:36,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:36,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:36,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:36,759 INFO L87 Difference]: Start difference. First operand 186 states and 288 transitions. Second operand 3 states. [2020-12-22 07:20:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:36,792 INFO L93 Difference]: Finished difference Result 313 states and 501 transitions. [2020-12-22 07:20:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:36,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:20:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:36,796 INFO L225 Difference]: With dead ends: 313 [2020-12-22 07:20:36,796 INFO L226 Difference]: Without dead ends: 243 [2020-12-22 07:20:36,797 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 07:20:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-22 07:20:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2020-12-22 07:20:36,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-22 07:20:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 380 transitions. [2020-12-22 07:20:36,816 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 380 transitions. Word has length 65 [2020-12-22 07:20:36,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:36,817 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 380 transitions. [2020-12-22 07:20:36,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:36,817 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 380 transitions. [2020-12-22 07:20:36,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:20:36,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:36,820 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] [2020-12-22 07:20:36,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:20:36,821 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:36,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:36,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1395779292, now seen corresponding path program 1 times [2020-12-22 07:20:36,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:36,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954242635] [2020-12-22 07:20:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:36,932 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 07:20:36,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954242635] [2020-12-22 07:20:36,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:36,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:36,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330976341] [2020-12-22 07:20:36,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:36,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:36,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:36,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:36,935 INFO L87 Difference]: Start difference. First operand 241 states and 380 transitions. Second operand 3 states. [2020-12-22 07:20:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:36,972 INFO L93 Difference]: Finished difference Result 584 states and 947 transitions. [2020-12-22 07:20:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:36,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:20:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:36,976 INFO L225 Difference]: With dead ends: 584 [2020-12-22 07:20:36,976 INFO L226 Difference]: Without dead ends: 402 [2020-12-22 07:20:36,978 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 07:20:36,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-22 07:20:37,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-12-22 07:20:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-12-22 07:20:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 640 transitions. [2020-12-22 07:20:37,003 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 640 transitions. Word has length 65 [2020-12-22 07:20:37,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:37,004 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 640 transitions. [2020-12-22 07:20:37,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:37,004 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 640 transitions. [2020-12-22 07:20:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:20:37,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:37,007 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 07:20:37,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:20:37,007 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:37,008 INFO L82 PathProgramCache]: Analyzing trace with hash -812427391, now seen corresponding path program 1 times [2020-12-22 07:20:37,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:37,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89005410] [2020-12-22 07:20:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:37,078 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 07:20:37,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89005410] [2020-12-22 07:20:37,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:37,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:37,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903171241] [2020-12-22 07:20:37,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:37,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:37,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:37,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:37,082 INFO L87 Difference]: Start difference. First operand 400 states and 640 transitions. Second operand 3 states. [2020-12-22 07:20:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:37,126 INFO L93 Difference]: Finished difference Result 729 states and 1183 transitions. [2020-12-22 07:20:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:37,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:20:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:37,132 INFO L225 Difference]: With dead ends: 729 [2020-12-22 07:20:37,132 INFO L226 Difference]: Without dead ends: 547 [2020-12-22 07:20:37,133 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 07:20:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-12-22 07:20:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2020-12-22 07:20:37,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2020-12-22 07:20:37,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 875 transitions. [2020-12-22 07:20:37,161 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 875 transitions. Word has length 67 [2020-12-22 07:20:37,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:37,162 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 875 transitions. [2020-12-22 07:20:37,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:37,162 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 875 transitions. [2020-12-22 07:20:37,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:20:37,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:37,164 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 07:20:37,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:20:37,164 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:37,165 INFO L82 PathProgramCache]: Analyzing trace with hash 221435787, now seen corresponding path program 1 times [2020-12-22 07:20:37,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:37,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417373668] [2020-12-22 07:20:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:37,343 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 07:20:37,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417373668] [2020-12-22 07:20:37,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:37,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:37,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119214451] [2020-12-22 07:20:37,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:37,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:37,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:37,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:37,351 INFO L87 Difference]: Start difference. First operand 545 states and 875 transitions. Second operand 3 states. [2020-12-22 07:20:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:37,416 INFO L93 Difference]: Finished difference Result 1434 states and 2326 transitions. [2020-12-22 07:20:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:37,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:20:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:37,424 INFO L225 Difference]: With dead ends: 1434 [2020-12-22 07:20:37,424 INFO L226 Difference]: Without dead ends: 958 [2020-12-22 07:20:37,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:20:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2020-12-22 07:20:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 956. [2020-12-22 07:20:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2020-12-22 07:20:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1532 transitions. [2020-12-22 07:20:37,470 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1532 transitions. Word has length 67 [2020-12-22 07:20:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:37,472 INFO L481 AbstractCegarLoop]: Abstraction has 956 states and 1532 transitions. [2020-12-22 07:20:37,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:37,472 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1532 transitions. [2020-12-22 07:20:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:20:37,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:37,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:37,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:20:37,477 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:37,477 INFO L82 PathProgramCache]: Analyzing trace with hash 664156592, now seen corresponding path program 1 times [2020-12-22 07:20:37,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:37,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298881661] [2020-12-22 07:20:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:37,576 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 07:20:37,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298881661] [2020-12-22 07:20:37,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:37,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:37,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061745560] [2020-12-22 07:20:37,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:37,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:37,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:37,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:37,579 INFO L87 Difference]: Start difference. First operand 956 states and 1532 transitions. Second operand 3 states. [2020-12-22 07:20:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:37,641 INFO L93 Difference]: Finished difference Result 1783 states and 2881 transitions. [2020-12-22 07:20:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:37,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 07:20:37,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:37,650 INFO L225 Difference]: With dead ends: 1783 [2020-12-22 07:20:37,651 INFO L226 Difference]: Without dead ends: 1307 [2020-12-22 07:20:37,652 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 07:20:37,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-12-22 07:20:37,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1305. [2020-12-22 07:20:37,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1305 states. [2020-12-22 07:20:37,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 2086 transitions. [2020-12-22 07:20:37,719 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 2086 transitions. Word has length 69 [2020-12-22 07:20:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:37,720 INFO L481 AbstractCegarLoop]: Abstraction has 1305 states and 2086 transitions. [2020-12-22 07:20:37,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:37,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 2086 transitions. [2020-12-22 07:20:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:20:37,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:37,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:37,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:20:37,729 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:37,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:37,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1757720902, now seen corresponding path program 1 times [2020-12-22 07:20:37,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:37,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588947183] [2020-12-22 07:20:37,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:37,868 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 07:20:37,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588947183] [2020-12-22 07:20:37,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:37,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:20:37,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311937127] [2020-12-22 07:20:37,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:20:37,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:37,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:20:37,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:37,871 INFO L87 Difference]: Start difference. First operand 1305 states and 2086 transitions. Second operand 5 states. [2020-12-22 07:20:38,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:38,244 INFO L93 Difference]: Finished difference Result 6582 states and 10723 transitions. [2020-12-22 07:20:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:20:38,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 07:20:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:38,282 INFO L225 Difference]: With dead ends: 6582 [2020-12-22 07:20:38,282 INFO L226 Difference]: Without dead ends: 5356 [2020-12-22 07:20:38,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:20:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2020-12-22 07:20:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 2452. [2020-12-22 07:20:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2452 states. [2020-12-22 07:20:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3914 transitions. [2020-12-22 07:20:38,448 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3914 transitions. Word has length 69 [2020-12-22 07:20:38,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:38,449 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 3914 transitions. [2020-12-22 07:20:38,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:20:38,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3914 transitions. [2020-12-22 07:20:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:20:38,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:38,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:38,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:20:38,451 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:38,452 INFO L82 PathProgramCache]: Analyzing trace with hash -577605759, now seen corresponding path program 1 times [2020-12-22 07:20:38,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:38,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120959003] [2020-12-22 07:20:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:38,540 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 07:20:38,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120959003] [2020-12-22 07:20:38,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:38,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:38,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351804358] [2020-12-22 07:20:38,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:38,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:38,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:38,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:38,543 INFO L87 Difference]: Start difference. First operand 2452 states and 3914 transitions. Second operand 4 states. [2020-12-22 07:20:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:38,869 INFO L93 Difference]: Finished difference Result 7943 states and 12835 transitions. [2020-12-22 07:20:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:38,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 07:20:38,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:38,906 INFO L225 Difference]: With dead ends: 7943 [2020-12-22 07:20:38,906 INFO L226 Difference]: Without dead ends: 5570 [2020-12-22 07:20:38,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2020-12-22 07:20:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 3992. [2020-12-22 07:20:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3992 states. [2020-12-22 07:20:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 6384 transitions. [2020-12-22 07:20:39,184 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 6384 transitions. Word has length 70 [2020-12-22 07:20:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:39,184 INFO L481 AbstractCegarLoop]: Abstraction has 3992 states and 6384 transitions. [2020-12-22 07:20:39,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:39,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 6384 transitions. [2020-12-22 07:20:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:20:39,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:39,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:39,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:20:39,186 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1815229649, now seen corresponding path program 1 times [2020-12-22 07:20:39,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:39,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389003213] [2020-12-22 07:20:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:39,384 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 07:20:39,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389003213] [2020-12-22 07:20:39,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:39,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:39,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051806570] [2020-12-22 07:20:39,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:39,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:39,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:39,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:39,392 INFO L87 Difference]: Start difference. First operand 3992 states and 6384 transitions. Second operand 4 states. [2020-12-22 07:20:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:39,931 INFO L93 Difference]: Finished difference Result 13018 states and 20914 transitions. [2020-12-22 07:20:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:39,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 07:20:39,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:40,023 INFO L225 Difference]: With dead ends: 13018 [2020-12-22 07:20:40,024 INFO L226 Difference]: Without dead ends: 9105 [2020-12-22 07:20:40,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:40,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2020-12-22 07:20:40,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 6388. [2020-12-22 07:20:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6388 states. [2020-12-22 07:20:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6388 states to 6388 states and 10164 transitions. [2020-12-22 07:20:40,495 INFO L78 Accepts]: Start accepts. Automaton has 6388 states and 10164 transitions. Word has length 71 [2020-12-22 07:20:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:40,495 INFO L481 AbstractCegarLoop]: Abstraction has 6388 states and 10164 transitions. [2020-12-22 07:20:40,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 6388 states and 10164 transitions. [2020-12-22 07:20:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:20:40,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:40,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:40,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:20:40,497 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:40,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:40,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1147279688, now seen corresponding path program 1 times [2020-12-22 07:20:40,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:40,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381487756] [2020-12-22 07:20:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:40,589 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 07:20:40,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381487756] [2020-12-22 07:20:40,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:40,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:40,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669921140] [2020-12-22 07:20:40,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:40,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:40,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:40,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:40,592 INFO L87 Difference]: Start difference. First operand 6388 states and 10164 transitions. Second operand 4 states. [2020-12-22 07:20:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:41,394 INFO L93 Difference]: Finished difference Result 20047 states and 32019 transitions. [2020-12-22 07:20:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:41,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:20:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:41,442 INFO L225 Difference]: With dead ends: 20047 [2020-12-22 07:20:41,442 INFO L226 Difference]: Without dead ends: 13738 [2020-12-22 07:20:41,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:41,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13738 states. [2020-12-22 07:20:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13738 to 10020. [2020-12-22 07:20:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10020 states. [2020-12-22 07:20:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10020 states to 10020 states and 15856 transitions. [2020-12-22 07:20:42,251 INFO L78 Accepts]: Start accepts. Automaton has 10020 states and 15856 transitions. Word has length 72 [2020-12-22 07:20:42,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:42,251 INFO L481 AbstractCegarLoop]: Abstraction has 10020 states and 15856 transitions. [2020-12-22 07:20:42,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 10020 states and 15856 transitions. [2020-12-22 07:20:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:20:42,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:42,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:42,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:20:42,254 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:42,254 INFO L82 PathProgramCache]: Analyzing trace with hash -856706640, now seen corresponding path program 1 times [2020-12-22 07:20:42,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:42,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077131294] [2020-12-22 07:20:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:42,448 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 07:20:42,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077131294] [2020-12-22 07:20:42,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:42,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:42,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522575806] [2020-12-22 07:20:42,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:42,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:42,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:42,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:42,452 INFO L87 Difference]: Start difference. First operand 10020 states and 15856 transitions. Second operand 4 states. [2020-12-22 07:20:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:43,586 INFO L93 Difference]: Finished difference Result 29688 states and 46962 transitions. [2020-12-22 07:20:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:43,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:20:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:43,658 INFO L225 Difference]: With dead ends: 29688 [2020-12-22 07:20:43,659 INFO L226 Difference]: Without dead ends: 19677 [2020-12-22 07:20:43,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19677 states. [2020-12-22 07:20:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19677 to 19675. [2020-12-22 07:20:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19675 states. [2020-12-22 07:20:45,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19675 states to 19675 states and 30894 transitions. [2020-12-22 07:20:45,057 INFO L78 Accepts]: Start accepts. Automaton has 19675 states and 30894 transitions. Word has length 74 [2020-12-22 07:20:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:45,057 INFO L481 AbstractCegarLoop]: Abstraction has 19675 states and 30894 transitions. [2020-12-22 07:20:45,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand 19675 states and 30894 transitions. [2020-12-22 07:20:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:20:45,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:45,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:45,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:20:45,059 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:45,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:45,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1857988380, now seen corresponding path program 1 times [2020-12-22 07:20:45,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:45,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187492751] [2020-12-22 07:20:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:45,094 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 07:20:45,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187492751] [2020-12-22 07:20:45,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:45,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:45,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135839294] [2020-12-22 07:20:45,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:45,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:45,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:45,097 INFO L87 Difference]: Start difference. First operand 19675 states and 30894 transitions. Second operand 3 states. [2020-12-22 07:20:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:47,112 INFO L93 Difference]: Finished difference Result 58987 states and 92620 transitions. [2020-12-22 07:20:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:47,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 07:20:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:47,236 INFO L225 Difference]: With dead ends: 58987 [2020-12-22 07:20:47,237 INFO L226 Difference]: Without dead ends: 39340 [2020-12-22 07:20:47,271 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 07:20:47,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39340 states. [2020-12-22 07:20:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39340 to 19677. [2020-12-22 07:20:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19677 states. [2020-12-22 07:20:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19677 states to 19677 states and 30896 transitions. [2020-12-22 07:20:48,858 INFO L78 Accepts]: Start accepts. Automaton has 19677 states and 30896 transitions. Word has length 75 [2020-12-22 07:20:48,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:48,859 INFO L481 AbstractCegarLoop]: Abstraction has 19677 states and 30896 transitions. [2020-12-22 07:20:48,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 19677 states and 30896 transitions. [2020-12-22 07:20:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:20:48,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:48,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:48,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:20:48,861 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:48,863 INFO L82 PathProgramCache]: Analyzing trace with hash 424514133, now seen corresponding path program 1 times [2020-12-22 07:20:48,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:48,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087747168] [2020-12-22 07:20:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:49,038 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 07:20:49,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087747168] [2020-12-22 07:20:49,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:49,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:49,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599823529] [2020-12-22 07:20:49,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:49,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:49,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:49,042 INFO L87 Difference]: Start difference. First operand 19677 states and 30896 transitions. Second operand 4 states. [2020-12-22 07:20:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:50,795 INFO L93 Difference]: Finished difference Result 58291 states and 91488 transitions. [2020-12-22 07:20:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:50,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:20:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:50,888 INFO L225 Difference]: With dead ends: 58291 [2020-12-22 07:20:50,889 INFO L226 Difference]: Without dead ends: 38626 [2020-12-22 07:20:50,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38626 states. [2020-12-22 07:20:52,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38626 to 38624. [2020-12-22 07:20:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38624 states. [2020-12-22 07:20:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38624 states to 38624 states and 60157 transitions. [2020-12-22 07:20:53,013 INFO L78 Accepts]: Start accepts. Automaton has 38624 states and 60157 transitions. Word has length 76 [2020-12-22 07:20:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:53,015 INFO L481 AbstractCegarLoop]: Abstraction has 38624 states and 60157 transitions. [2020-12-22 07:20:53,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 38624 states and 60157 transitions. [2020-12-22 07:20:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:20:53,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:53,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:53,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:20:53,026 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:53,027 INFO L82 PathProgramCache]: Analyzing trace with hash 551656516, now seen corresponding path program 1 times [2020-12-22 07:20:53,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:53,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018519676] [2020-12-22 07:20:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:53,260 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 07:20:53,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018519676] [2020-12-22 07:20:53,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:53,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:53,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664808636] [2020-12-22 07:20:53,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:53,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:53,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:53,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:53,264 INFO L87 Difference]: Start difference. First operand 38624 states and 60157 transitions. Second operand 4 states. [2020-12-22 07:20:55,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:55,835 INFO L93 Difference]: Finished difference Result 114364 states and 178019 transitions. [2020-12-22 07:20:55,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:55,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:20:55,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:56,041 INFO L225 Difference]: With dead ends: 114364 [2020-12-22 07:20:56,041 INFO L226 Difference]: Without dead ends: 75786 [2020-12-22 07:20:56,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75786 states. [2020-12-22 07:20:59,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75786 to 75784. [2020-12-22 07:20:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75784 states. [2020-12-22 07:20:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75784 states to 75784 states and 117031 transitions. [2020-12-22 07:20:59,627 INFO L78 Accepts]: Start accepts. Automaton has 75784 states and 117031 transitions. Word has length 76 [2020-12-22 07:20:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:59,627 INFO L481 AbstractCegarLoop]: Abstraction has 75784 states and 117031 transitions. [2020-12-22 07:20:59,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 75784 states and 117031 transitions. [2020-12-22 07:20:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:20:59,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:59,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:59,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:20:59,630 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:59,630 INFO L82 PathProgramCache]: Analyzing trace with hash -656359944, now seen corresponding path program 1 times [2020-12-22 07:20:59,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:59,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519029765] [2020-12-22 07:20:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:20:59,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519029765] [2020-12-22 07:20:59,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:59,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:59,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257472418] [2020-12-22 07:20:59,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:59,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:59,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:59,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:59,670 INFO L87 Difference]: Start difference. First operand 75784 states and 117031 transitions. Second operand 3 states. [2020-12-22 07:21:05,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:05,075 INFO L93 Difference]: Finished difference Result 227228 states and 350901 transitions. [2020-12-22 07:21:05,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:05,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 07:21:05,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:05,519 INFO L225 Difference]: With dead ends: 227228 [2020-12-22 07:21:05,519 INFO L226 Difference]: Without dead ends: 151518 [2020-12-22 07:21:05,676 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 07:21:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151518 states. [2020-12-22 07:21:09,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151518 to 75792. [2020-12-22 07:21:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75792 states. [2020-12-22 07:21:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75792 states to 75792 states and 117039 transitions. [2020-12-22 07:21:10,054 INFO L78 Accepts]: Start accepts. Automaton has 75792 states and 117039 transitions. Word has length 77 [2020-12-22 07:21:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:10,054 INFO L481 AbstractCegarLoop]: Abstraction has 75792 states and 117039 transitions. [2020-12-22 07:21:10,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 75792 states and 117039 transitions. [2020-12-22 07:21:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:21:10,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:10,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:10,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:21:10,057 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:10,057 INFO L82 PathProgramCache]: Analyzing trace with hash 834408617, now seen corresponding path program 1 times [2020-12-22 07:21:10,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:10,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263287858] [2020-12-22 07:21:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:10,165 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 07:21:10,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263287858] [2020-12-22 07:21:10,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:10,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:10,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807921253] [2020-12-22 07:21:10,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:10,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:10,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:10,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:10,174 INFO L87 Difference]: Start difference. First operand 75792 states and 117039 transitions. Second operand 4 states. [2020-12-22 07:21:15,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:15,860 INFO L93 Difference]: Finished difference Result 224404 states and 346298 transitions. [2020-12-22 07:21:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:15,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:21:15,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:16,277 INFO L225 Difference]: With dead ends: 224404 [2020-12-22 07:21:16,277 INFO L226 Difference]: Without dead ends: 148667 [2020-12-22 07:21:16,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:16,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148667 states. [2020-12-22 07:21:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148667 to 148665. [2020-12-22 07:21:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148665 states. [2020-12-22 07:21:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148665 states to 148665 states and 227541 transitions. [2020-12-22 07:21:23,212 INFO L78 Accepts]: Start accepts. Automaton has 148665 states and 227541 transitions. Word has length 78 [2020-12-22 07:21:23,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:23,212 INFO L481 AbstractCegarLoop]: Abstraction has 148665 states and 227541 transitions. [2020-12-22 07:21:23,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 148665 states and 227541 transitions. [2020-12-22 07:21:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:21:23,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:23,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:23,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:21:23,216 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:23,217 INFO L82 PathProgramCache]: Analyzing trace with hash 640680152, now seen corresponding path program 1 times [2020-12-22 07:21:23,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:23,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033619334] [2020-12-22 07:21:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:23,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033619334] [2020-12-22 07:21:23,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:23,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:23,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274960757] [2020-12-22 07:21:23,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:23,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:23,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:23,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:23,314 INFO L87 Difference]: Start difference. First operand 148665 states and 227541 transitions. Second operand 4 states. [2020-12-22 07:21:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:35,738 INFO L93 Difference]: Finished difference Result 440021 states and 672927 transitions. [2020-12-22 07:21:35,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:35,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:21:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:36,325 INFO L225 Difference]: With dead ends: 440021 [2020-12-22 07:21:36,326 INFO L226 Difference]: Without dead ends: 291515 [2020-12-22 07:21:36,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291515 states. [2020-12-22 07:21:49,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291515 to 291513. [2020-12-22 07:21:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291513 states. [2020-12-22 07:21:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291513 states to 291513 states and 442037 transitions. [2020-12-22 07:21:50,410 INFO L78 Accepts]: Start accepts. Automaton has 291513 states and 442037 transitions. Word has length 78 [2020-12-22 07:21:50,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:50,410 INFO L481 AbstractCegarLoop]: Abstraction has 291513 states and 442037 transitions. [2020-12-22 07:21:50,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:50,410 INFO L276 IsEmpty]: Start isEmpty. Operand 291513 states and 442037 transitions. [2020-12-22 07:21:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:21:50,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:50,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:50,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:21:50,415 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:50,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:50,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1890599668, now seen corresponding path program 1 times [2020-12-22 07:21:50,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:50,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448929111] [2020-12-22 07:21:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:50,454 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 07:21:50,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448929111] [2020-12-22 07:21:50,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:50,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:50,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891446580] [2020-12-22 07:21:50,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:50,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:50,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:50,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:50,456 INFO L87 Difference]: Start difference. First operand 291513 states and 442037 transitions. Second operand 3 states. [2020-12-22 07:22:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:14,838 INFO L93 Difference]: Finished difference Result 873245 states and 1324519 transitions. [2020-12-22 07:22:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:14,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:22:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:16,043 INFO L225 Difference]: With dead ends: 873245 [2020-12-22 07:22:16,043 INFO L226 Difference]: Without dead ends: 582795 [2020-12-22 07:22:16,347 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 07:22:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582795 states. [2020-12-22 07:22:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582795 to 291545. [2020-12-22 07:22:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291545 states. [2020-12-22 07:22:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291545 states to 291545 states and 442069 transitions. [2020-12-22 07:22:34,819 INFO L78 Accepts]: Start accepts. Automaton has 291545 states and 442069 transitions. Word has length 79 [2020-12-22 07:22:34,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:34,819 INFO L481 AbstractCegarLoop]: Abstraction has 291545 states and 442069 transitions. [2020-12-22 07:22:34,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 291545 states and 442069 transitions. [2020-12-22 07:22:34,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:22:34,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:34,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:34,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:22:34,846 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:34,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1453451011, now seen corresponding path program 1 times [2020-12-22 07:22:34,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:34,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053369025] [2020-12-22 07:22:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:35,073 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 07:22:35,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053369025] [2020-12-22 07:22:35,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:35,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:35,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919821538] [2020-12-22 07:22:35,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:35,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:35,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:35,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:35,075 INFO L87 Difference]: Start difference. First operand 291545 states and 442069 transitions. Second operand 4 states. [2020-12-22 07:23:05,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:05,594 INFO L93 Difference]: Finished difference Result 862768 states and 1306995 transitions. [2020-12-22 07:23:05,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:05,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 07:23:05,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:07,072 INFO L225 Difference]: With dead ends: 862768 [2020-12-22 07:23:07,073 INFO L226 Difference]: Without dead ends: 571474 [2020-12-22 07:23:07,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571474 states. [2020-12-22 07:23:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571474 to 571472. [2020-12-22 07:23:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571472 states. [2020-12-22 07:23:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571472 states to 571472 states and 858117 transitions. [2020-12-22 07:23:43,508 INFO L78 Accepts]: Start accepts. Automaton has 571472 states and 858117 transitions. Word has length 80 [2020-12-22 07:23:43,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:43,509 INFO L481 AbstractCegarLoop]: Abstraction has 571472 states and 858117 transitions. [2020-12-22 07:23:43,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:43,509 INFO L276 IsEmpty]: Start isEmpty. Operand 571472 states and 858117 transitions. [2020-12-22 07:23:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:23:43,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:43,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:23:43,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:23:43,557 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:43,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:43,558 INFO L82 PathProgramCache]: Analyzing trace with hash -194781332, now seen corresponding path program 1 times [2020-12-22 07:23:43,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:43,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285372633] [2020-12-22 07:23:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:43,660 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 07:23:43,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285372633] [2020-12-22 07:23:43,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:43,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:43,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854838650] [2020-12-22 07:23:43,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:43,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:43,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:43,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:43,668 INFO L87 Difference]: Start difference. First operand 571472 states and 858117 transitions. Second operand 4 states.