/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:55:31,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:55:31,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:55:31,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:55:31,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:55:31,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:55:31,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:55:31,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:55:31,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:55:31,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:55:31,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:55:31,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:55:31,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:55:31,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:55:31,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:55:31,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:55:31,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:55:31,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:55:31,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:55:31,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:55:31,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:55:31,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:55:31,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:55:31,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:55:31,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:55:31,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:55:31,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:55:31,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:55:31,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:55:31,473 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:55:31,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:55:31,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:55:31,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:55:31,476 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:55:31,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:55:31,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:55:31,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:55:31,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:55:31,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:55:31,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:55:31,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:55:31,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:55:31,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:55:31,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:55:31,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:55:31,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:55:31,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:55:31,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:55:31,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:55:31,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:55:31,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:55:31,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:55:31,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:55:31,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:55:31,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:55:31,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:55:31,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:55:31,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:55:31,891 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:55:31,892 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:55:31,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c [2020-12-22 09:55:31,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9481cf1ac/4b373193599d4dbc859ae6ed78a3dc0c/FLAGf9d257d53 [2020-12-22 09:55:32,878 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:55:32,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c [2020-12-22 09:55:32,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9481cf1ac/4b373193599d4dbc859ae6ed78a3dc0c/FLAGf9d257d53 [2020-12-22 09:55:33,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9481cf1ac/4b373193599d4dbc859ae6ed78a3dc0c [2020-12-22 09:55:33,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:55:33,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:55:33,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:55:33,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:55:33,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:55:33,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:55:33" (1/1) ... [2020-12-22 09:55:33,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3a942f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:33, skipping insertion in model container [2020-12-22 09:55:33,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:55:33" (1/1) ... [2020-12-22 09:55:33,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:55:33,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:55:33,985 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c[11730,11743] [2020-12-22 09:55:34,044 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c[14304,14317] [2020-12-22 09:55:35,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:55:35,025 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:55:35,091 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c[11730,11743] [2020-12-22 09:55:35,109 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c[14304,14317] [2020-12-22 09:55:35,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:55:35,722 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:55:35,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:35 WrapperNode [2020-12-22 09:55:35,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:55:35,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:55:35,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:55:35,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:55:35,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:35" (1/1) ... [2020-12-22 09:55:35,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:35" (1/1) ... [2020-12-22 09:55:36,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:55:36,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:55:36,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:55:36,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:55:36,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:35" (1/1) ... [2020-12-22 09:55:36,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:35" (1/1) ... [2020-12-22 09:55:36,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:35" (1/1) ... [2020-12-22 09:55:36,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:35" (1/1) ... [2020-12-22 09:55:36,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:35" (1/1) ... [2020-12-22 09:55:36,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:35" (1/1) ... [2020-12-22 09:55:36,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:35" (1/1) ... [2020-12-22 09:55:37,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:55:37,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:55:37,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:55:37,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:55:37,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:55:37,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:55:37,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:55:37,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:55:37,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:55:42,652 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:55:42,653 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:55:42,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:55:42 BoogieIcfgContainer [2020-12-22 09:55:42,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:55:42,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:55:42,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:55:42,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:55:42,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:55:33" (1/3) ... [2020-12-22 09:55:42,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96bb956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:55:42, skipping insertion in model container [2020-12-22 09:55:42,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:35" (2/3) ... [2020-12-22 09:55:42,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96bb956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:55:42, skipping insertion in model container [2020-12-22 09:55:42,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:55:42" (3/3) ... [2020-12-22 09:55:42,666 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c [2020-12-22 09:55:42,674 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:55:42,692 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:55:42,712 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:55:42,749 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:55:42,749 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:55:42,749 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:55:42,749 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:55:42,750 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:55:42,750 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:55:42,750 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:55:42,750 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:55:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states. [2020-12-22 09:55:42,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 09:55:42,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:42,796 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] [2020-12-22 09:55:42,796 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:42,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1870188587, now seen corresponding path program 1 times [2020-12-22 09:55:42,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:42,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017572497] [2020-12-22 09:55:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:43,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017572497] [2020-12-22 09:55:43,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:43,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:55:43,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287260947] [2020-12-22 09:55:43,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:43,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:43,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:43,240 INFO L87 Difference]: Start difference. First operand 909 states. Second operand 3 states. [2020-12-22 09:55:48,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:48,244 INFO L93 Difference]: Finished difference Result 2536 states and 4876 transitions. [2020-12-22 09:55:48,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:48,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 09:55:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:48,294 INFO L225 Difference]: With dead ends: 2536 [2020-12-22 09:55:48,294 INFO L226 Difference]: Without dead ends: 1594 [2020-12-22 09:55:48,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-12-22 09:55:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2020-12-22 09:55:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1594 states. [2020-12-22 09:55:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2616 transitions. [2020-12-22 09:55:48,491 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2616 transitions. Word has length 24 [2020-12-22 09:55:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:48,491 INFO L481 AbstractCegarLoop]: Abstraction has 1594 states and 2616 transitions. [2020-12-22 09:55:48,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:48,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2616 transitions. [2020-12-22 09:55:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:55:48,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:48,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:48,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:55:48,495 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:48,496 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:55:48,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:48,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831232556] [2020-12-22 09:55:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:48,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831232556] [2020-12-22 09:55:48,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:48,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:48,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819213626] [2020-12-22 09:55:48,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:55:48,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:48,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:55:48,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:55:48,673 INFO L87 Difference]: Start difference. First operand 1594 states and 2616 transitions. Second operand 5 states. [2020-12-22 09:55:48,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:48,779 INFO L93 Difference]: Finished difference Result 1650 states and 2702 transitions. [2020-12-22 09:55:48,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:55:48,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:55:48,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:48,789 INFO L225 Difference]: With dead ends: 1650 [2020-12-22 09:55:48,789 INFO L226 Difference]: Without dead ends: 1594 [2020-12-22 09:55:48,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:55:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-12-22 09:55:48,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2020-12-22 09:55:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1594 states. [2020-12-22 09:55:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2585 transitions. [2020-12-22 09:55:48,837 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2585 transitions. Word has length 34 [2020-12-22 09:55:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:48,837 INFO L481 AbstractCegarLoop]: Abstraction has 1594 states and 2585 transitions. [2020-12-22 09:55:48,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:55:48,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2585 transitions. [2020-12-22 09:55:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:48,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:48,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:48,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:55:48,850 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:48,853 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:55:48,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:48,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473903989] [2020-12-22 09:55:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:49,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473903989] [2020-12-22 09:55:49,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:49,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:49,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914144043] [2020-12-22 09:55:49,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:49,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:49,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:49,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:49,106 INFO L87 Difference]: Start difference. First operand 1594 states and 2585 transitions. Second operand 3 states. [2020-12-22 09:55:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:49,155 INFO L93 Difference]: Finished difference Result 1692 states and 2739 transitions. [2020-12-22 09:55:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:49,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:55:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:49,167 INFO L225 Difference]: With dead ends: 1692 [2020-12-22 09:55:49,169 INFO L226 Difference]: Without dead ends: 1640 [2020-12-22 09:55:49,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2020-12-22 09:55:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1638. [2020-12-22 09:55:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1638 states. [2020-12-22 09:55:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2655 transitions. [2020-12-22 09:55:49,236 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2655 transitions. Word has length 64 [2020-12-22 09:55:49,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:49,238 INFO L481 AbstractCegarLoop]: Abstraction has 1638 states and 2655 transitions. [2020-12-22 09:55:49,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:49,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2655 transitions. [2020-12-22 09:55:49,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:49,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:49,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:49,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:55:49,241 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:49,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:49,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:55:49,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:49,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973264132] [2020-12-22 09:55:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:49,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973264132] [2020-12-22 09:55:49,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:49,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:49,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321582359] [2020-12-22 09:55:49,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:49,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:49,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:49,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:49,374 INFO L87 Difference]: Start difference. First operand 1638 states and 2655 transitions. Second operand 3 states. [2020-12-22 09:55:49,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:49,426 INFO L93 Difference]: Finished difference Result 1818 states and 2939 transitions. [2020-12-22 09:55:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:49,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:55:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:49,438 INFO L225 Difference]: With dead ends: 1818 [2020-12-22 09:55:49,438 INFO L226 Difference]: Without dead ends: 1722 [2020-12-22 09:55:49,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2020-12-22 09:55:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1720. [2020-12-22 09:55:49,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1720 states. [2020-12-22 09:55:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2784 transitions. [2020-12-22 09:55:49,496 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2784 transitions. Word has length 64 [2020-12-22 09:55:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:49,497 INFO L481 AbstractCegarLoop]: Abstraction has 1720 states and 2784 transitions. [2020-12-22 09:55:49,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:49,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2784 transitions. [2020-12-22 09:55:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:49,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:49,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:49,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:55:49,499 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:49,500 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:55:49,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:49,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804641097] [2020-12-22 09:55:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:49,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804641097] [2020-12-22 09:55:49,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:49,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:49,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213429633] [2020-12-22 09:55:49,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:49,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:49,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:49,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:49,594 INFO L87 Difference]: Start difference. First operand 1720 states and 2784 transitions. Second operand 3 states. [2020-12-22 09:55:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:49,646 INFO L93 Difference]: Finished difference Result 2052 states and 3306 transitions. [2020-12-22 09:55:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:49,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:55:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:49,658 INFO L225 Difference]: With dead ends: 2052 [2020-12-22 09:55:49,658 INFO L226 Difference]: Without dead ends: 1874 [2020-12-22 09:55:49,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2020-12-22 09:55:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2020-12-22 09:55:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2020-12-22 09:55:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 3020 transitions. [2020-12-22 09:55:49,720 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 3020 transitions. Word has length 64 [2020-12-22 09:55:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:49,720 INFO L481 AbstractCegarLoop]: Abstraction has 1872 states and 3020 transitions. [2020-12-22 09:55:49,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 3020 transitions. [2020-12-22 09:55:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:49,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:49,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:49,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:55:49,722 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:55:49,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:49,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250227158] [2020-12-22 09:55:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:49,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250227158] [2020-12-22 09:55:49,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:49,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:49,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941113102] [2020-12-22 09:55:49,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:49,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:49,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:49,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:49,786 INFO L87 Difference]: Start difference. First operand 1872 states and 3020 transitions. Second operand 3 states. [2020-12-22 09:55:49,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:49,847 INFO L93 Difference]: Finished difference Result 2484 states and 3974 transitions. [2020-12-22 09:55:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:49,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:55:49,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:49,860 INFO L225 Difference]: With dead ends: 2484 [2020-12-22 09:55:49,860 INFO L226 Difference]: Without dead ends: 2154 [2020-12-22 09:55:49,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:49,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2020-12-22 09:55:49,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2020-12-22 09:55:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2152 states. [2020-12-22 09:55:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3448 transitions. [2020-12-22 09:55:49,940 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3448 transitions. Word has length 64 [2020-12-22 09:55:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:49,941 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 3448 transitions. [2020-12-22 09:55:49,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:49,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3448 transitions. [2020-12-22 09:55:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:49,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:49,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:49,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:55:49,943 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:49,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:49,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:55:49,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:49,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706375511] [2020-12-22 09:55:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:50,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706375511] [2020-12-22 09:55:50,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:50,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:50,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321592557] [2020-12-22 09:55:50,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:50,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:50,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:50,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:50,015 INFO L87 Difference]: Start difference. First operand 2152 states and 3448 transitions. Second operand 3 states. [2020-12-22 09:55:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:50,101 INFO L93 Difference]: Finished difference Result 3276 states and 5178 transitions. [2020-12-22 09:55:50,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:50,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:55:50,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:50,116 INFO L225 Difference]: With dead ends: 3276 [2020-12-22 09:55:50,116 INFO L226 Difference]: Without dead ends: 2666 [2020-12-22 09:55:50,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2020-12-22 09:55:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2664. [2020-12-22 09:55:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2664 states. [2020-12-22 09:55:50,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 4216 transitions. [2020-12-22 09:55:50,224 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 4216 transitions. Word has length 64 [2020-12-22 09:55:50,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:50,224 INFO L481 AbstractCegarLoop]: Abstraction has 2664 states and 4216 transitions. [2020-12-22 09:55:50,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:50,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 4216 transitions. [2020-12-22 09:55:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:50,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:50,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:50,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:55:50,226 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:50,227 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:55:50,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:50,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222852454] [2020-12-22 09:55:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:50,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222852454] [2020-12-22 09:55:50,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:50,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:55:50,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952718509] [2020-12-22 09:55:50,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:55:50,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:50,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:55:50,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:55:50,322 INFO L87 Difference]: Start difference. First operand 2664 states and 4216 transitions. Second operand 7 states. [2020-12-22 09:55:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:50,975 INFO L93 Difference]: Finished difference Result 13884 states and 21346 transitions. [2020-12-22 09:55:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:55:50,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:55:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:51,043 INFO L225 Difference]: With dead ends: 13884 [2020-12-22 09:55:51,044 INFO L226 Difference]: Without dead ends: 12762 [2020-12-22 09:55:51,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:55:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12762 states. [2020-12-22 09:55:51,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12762 to 3784. [2020-12-22 09:55:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-12-22 09:55:51,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5864 transitions. [2020-12-22 09:55:51,357 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5864 transitions. Word has length 64 [2020-12-22 09:55:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:51,358 INFO L481 AbstractCegarLoop]: Abstraction has 3784 states and 5864 transitions. [2020-12-22 09:55:51,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:55:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5864 transitions. [2020-12-22 09:55:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:55:51,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:51,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:51,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:55:51,359 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:51,360 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:55:51,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:51,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494137210] [2020-12-22 09:55:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:51,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494137210] [2020-12-22 09:55:51,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:51,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:51,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094811160] [2020-12-22 09:55:51,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:51,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:51,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:51,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:51,416 INFO L87 Difference]: Start difference. First operand 3784 states and 5864 transitions. Second operand 3 states. [2020-12-22 09:55:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:51,628 INFO L93 Difference]: Finished difference Result 7070 states and 10780 transitions. [2020-12-22 09:55:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:51,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:55:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:51,700 INFO L225 Difference]: With dead ends: 7070 [2020-12-22 09:55:51,700 INFO L226 Difference]: Without dead ends: 4828 [2020-12-22 09:55:51,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:51,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2020-12-22 09:55:51,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2020-12-22 09:55:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:55:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7370 transitions. [2020-12-22 09:55:51,966 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7370 transitions. Word has length 66 [2020-12-22 09:55:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:51,966 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7370 transitions. [2020-12-22 09:55:51,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7370 transitions. [2020-12-22 09:55:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:55:51,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:51,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:51,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:55:51,968 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:51,968 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:55:51,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:51,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458773833] [2020-12-22 09:55:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:52,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458773833] [2020-12-22 09:55:52,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:52,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:55:52,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411976709] [2020-12-22 09:55:52,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:55:52,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:52,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:55:52,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:55:52,149 INFO L87 Difference]: Start difference. First operand 4826 states and 7370 transitions. Second operand 7 states. [2020-12-22 09:55:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:52,578 INFO L93 Difference]: Finished difference Result 8110 states and 12236 transitions. [2020-12-22 09:55:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:55:52,579 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:55:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:52,593 INFO L225 Difference]: With dead ends: 8110 [2020-12-22 09:55:52,594 INFO L226 Difference]: Without dead ends: 4828 [2020-12-22 09:55:52,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:55:52,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2020-12-22 09:55:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2020-12-22 09:55:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:55:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7322 transitions. [2020-12-22 09:55:52,870 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7322 transitions. Word has length 66 [2020-12-22 09:55:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:52,870 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7322 transitions. [2020-12-22 09:55:52,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:55:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7322 transitions. [2020-12-22 09:55:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:55:52,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:52,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:52,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:55:52,872 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:52,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:55:52,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:52,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235116523] [2020-12-22 09:55:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:52,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235116523] [2020-12-22 09:55:52,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:52,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:52,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717770242] [2020-12-22 09:55:52,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:55:52,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:52,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:55:52,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:55:52,993 INFO L87 Difference]: Start difference. First operand 4826 states and 7322 transitions. Second operand 6 states. [2020-12-22 09:55:53,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:53,356 INFO L93 Difference]: Finished difference Result 8108 states and 12139 transitions. [2020-12-22 09:55:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:55:53,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:55:53,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:53,368 INFO L225 Difference]: With dead ends: 8108 [2020-12-22 09:55:53,368 INFO L226 Difference]: Without dead ends: 4826 [2020-12-22 09:55:53,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:55:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2020-12-22 09:55:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2020-12-22 09:55:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:55:53,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7274 transitions. [2020-12-22 09:55:53,654 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7274 transitions. Word has length 67 [2020-12-22 09:55:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:53,655 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7274 transitions. [2020-12-22 09:55:53,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:55:53,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7274 transitions. [2020-12-22 09:55:53,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:55:53,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:53,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:53,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:55:53,656 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:53,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:55:53,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:53,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867256885] [2020-12-22 09:55:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:53,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867256885] [2020-12-22 09:55:53,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:53,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:53,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219321735] [2020-12-22 09:55:53,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:55:53,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:53,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:55:53,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:55:53,769 INFO L87 Difference]: Start difference. First operand 4826 states and 7274 transitions. Second operand 6 states. [2020-12-22 09:55:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:54,197 INFO L93 Difference]: Finished difference Result 8108 states and 12043 transitions. [2020-12-22 09:55:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:55:54,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:55:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:54,210 INFO L225 Difference]: With dead ends: 8108 [2020-12-22 09:55:54,210 INFO L226 Difference]: Without dead ends: 4826 [2020-12-22 09:55:54,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:55:54,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2020-12-22 09:55:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2020-12-22 09:55:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:55:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7226 transitions. [2020-12-22 09:55:54,492 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7226 transitions. Word has length 67 [2020-12-22 09:55:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:54,492 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7226 transitions. [2020-12-22 09:55:54,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:55:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7226 transitions. [2020-12-22 09:55:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:55:54,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:54,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:54,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:55:54,494 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:54,494 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:55:54,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:54,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206682576] [2020-12-22 09:55:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:54,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206682576] [2020-12-22 09:55:54,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:54,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:54,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451310604] [2020-12-22 09:55:54,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:55:54,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:54,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:55:54,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:55:54,591 INFO L87 Difference]: Start difference. First operand 4826 states and 7226 transitions. Second operand 5 states. [2020-12-22 09:55:55,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:55,051 INFO L93 Difference]: Finished difference Result 7669 states and 11200 transitions. [2020-12-22 09:55:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:55:55,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:55:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:55,070 INFO L225 Difference]: With dead ends: 7669 [2020-12-22 09:55:55,070 INFO L226 Difference]: Without dead ends: 7667 [2020-12-22 09:55:55,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:55:55,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2020-12-22 09:55:55,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 5018. [2020-12-22 09:55:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:55:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7402 transitions. [2020-12-22 09:55:55,434 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7402 transitions. Word has length 67 [2020-12-22 09:55:55,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:55,434 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7402 transitions. [2020-12-22 09:55:55,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:55:55,435 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7402 transitions. [2020-12-22 09:55:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:55:55,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:55,439 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:55,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:55:55,439 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:55,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2020-12-22 09:55:55,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:55,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793336356] [2020-12-22 09:55:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:55:55,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793336356] [2020-12-22 09:55:55,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:55,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:55:55,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467389116] [2020-12-22 09:55:55,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:55:55,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:55,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:55:55,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:55:55,660 INFO L87 Difference]: Start difference. First operand 5018 states and 7402 transitions. Second operand 7 states. [2020-12-22 09:55:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:57,006 INFO L93 Difference]: Finished difference Result 23094 states and 32832 transitions. [2020-12-22 09:55:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:55:57,006 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:55:57,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:57,051 INFO L225 Difference]: With dead ends: 23094 [2020-12-22 09:55:57,051 INFO L226 Difference]: Without dead ends: 19620 [2020-12-22 09:55:57,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:55:57,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2020-12-22 09:55:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 8490. [2020-12-22 09:55:57,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8490 states. [2020-12-22 09:55:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12250 transitions. [2020-12-22 09:55:58,005 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12250 transitions. Word has length 95 [2020-12-22 09:55:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:58,006 INFO L481 AbstractCegarLoop]: Abstraction has 8490 states and 12250 transitions. [2020-12-22 09:55:58,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:55:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12250 transitions. [2020-12-22 09:55:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:55:58,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:58,016 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:58,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:55:58,016 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:58,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2020-12-22 09:55:58,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:58,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042889656] [2020-12-22 09:55:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:55:58,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042889656] [2020-12-22 09:55:58,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:58,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:55:58,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231680446] [2020-12-22 09:55:58,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:55:58,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:58,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:55:58,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:55:58,188 INFO L87 Difference]: Start difference. First operand 8490 states and 12250 transitions. Second operand 7 states. [2020-12-22 09:56:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:00,048 INFO L93 Difference]: Finished difference Result 26566 states and 37680 transitions. [2020-12-22 09:56:00,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:00,048 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:00,097 INFO L225 Difference]: With dead ends: 26566 [2020-12-22 09:56:00,097 INFO L226 Difference]: Without dead ends: 23092 [2020-12-22 09:56:00,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2020-12-22 09:56:01,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 13706. [2020-12-22 09:56:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13706 states. [2020-12-22 09:56:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13706 states to 13706 states and 19482 transitions. [2020-12-22 09:56:01,349 INFO L78 Accepts]: Start accepts. Automaton has 13706 states and 19482 transitions. Word has length 95 [2020-12-22 09:56:01,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:01,349 INFO L481 AbstractCegarLoop]: Abstraction has 13706 states and 19482 transitions. [2020-12-22 09:56:01,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 13706 states and 19482 transitions. [2020-12-22 09:56:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:01,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:01,356 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:01,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:56:01,357 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:01,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2020-12-22 09:56:01,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:01,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97126110] [2020-12-22 09:56:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:56:01,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97126110] [2020-12-22 09:56:01,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:01,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:01,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353726612] [2020-12-22 09:56:01,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:01,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:01,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:01,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:01,482 INFO L87 Difference]: Start difference. First operand 13706 states and 19482 transitions. Second operand 7 states. [2020-12-22 09:56:03,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:03,096 INFO L93 Difference]: Finished difference Result 30038 states and 42528 transitions. [2020-12-22 09:56:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:03,096 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:03,156 INFO L225 Difference]: With dead ends: 30038 [2020-12-22 09:56:03,156 INFO L226 Difference]: Without dead ends: 26564 [2020-12-22 09:56:03,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26564 states. [2020-12-22 09:56:04,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26564 to 17178. [2020-12-22 09:56:04,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17178 states. [2020-12-22 09:56:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17178 states to 17178 states and 24330 transitions. [2020-12-22 09:56:04,494 INFO L78 Accepts]: Start accepts. Automaton has 17178 states and 24330 transitions. Word has length 95 [2020-12-22 09:56:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:04,494 INFO L481 AbstractCegarLoop]: Abstraction has 17178 states and 24330 transitions. [2020-12-22 09:56:04,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 17178 states and 24330 transitions. [2020-12-22 09:56:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:04,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:04,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:04,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:56:04,502 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:04,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:04,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2020-12-22 09:56:04,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:04,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803872483] [2020-12-22 09:56:04,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:56:04,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803872483] [2020-12-22 09:56:04,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:04,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:04,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466397435] [2020-12-22 09:56:04,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:04,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:04,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:04,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:04,639 INFO L87 Difference]: Start difference. First operand 17178 states and 24330 transitions. Second operand 7 states. [2020-12-22 09:56:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:06,303 INFO L93 Difference]: Finished difference Result 33510 states and 47376 transitions. [2020-12-22 09:56:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:06,304 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:06,366 INFO L225 Difference]: With dead ends: 33510 [2020-12-22 09:56:06,366 INFO L226 Difference]: Without dead ends: 30036 [2020-12-22 09:56:06,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30036 states. [2020-12-22 09:56:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30036 to 20650. [2020-12-22 09:56:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20650 states. [2020-12-22 09:56:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 29178 transitions. [2020-12-22 09:56:07,724 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 29178 transitions. Word has length 95 [2020-12-22 09:56:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:07,724 INFO L481 AbstractCegarLoop]: Abstraction has 20650 states and 29178 transitions. [2020-12-22 09:56:07,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 29178 transitions. [2020-12-22 09:56:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:07,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:07,731 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:07,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:56:07,731 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:07,732 INFO L82 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2020-12-22 09:56:07,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:07,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282980767] [2020-12-22 09:56:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:56:07,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282980767] [2020-12-22 09:56:07,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:07,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:07,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168745728] [2020-12-22 09:56:07,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:07,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:07,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:07,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:07,839 INFO L87 Difference]: Start difference. First operand 20650 states and 29178 transitions. Second operand 7 states. [2020-12-22 09:56:09,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:09,772 INFO L93 Difference]: Finished difference Result 34902 states and 49344 transitions. [2020-12-22 09:56:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:09,772 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:09,835 INFO L225 Difference]: With dead ends: 34902 [2020-12-22 09:56:09,835 INFO L226 Difference]: Without dead ends: 32468 [2020-12-22 09:56:09,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32468 states. [2020-12-22 09:56:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32468 to 23082. [2020-12-22 09:56:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23082 states. [2020-12-22 09:56:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23082 states to 23082 states and 32602 transitions. [2020-12-22 09:56:11,402 INFO L78 Accepts]: Start accepts. Automaton has 23082 states and 32602 transitions. Word has length 95 [2020-12-22 09:56:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:11,403 INFO L481 AbstractCegarLoop]: Abstraction has 23082 states and 32602 transitions. [2020-12-22 09:56:11,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 23082 states and 32602 transitions. [2020-12-22 09:56:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:11,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:11,411 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:11,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:56:11,411 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:11,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1978530522, now seen corresponding path program 1 times [2020-12-22 09:56:11,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:11,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008947669] [2020-12-22 09:56:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 09:56:11,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008947669] [2020-12-22 09:56:11,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:11,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:56:11,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284418835] [2020-12-22 09:56:11,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:11,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:11,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:11,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:11,619 INFO L87 Difference]: Start difference. First operand 23082 states and 32602 transitions. Second operand 3 states. [2020-12-22 09:56:17,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:17,834 INFO L93 Difference]: Finished difference Result 26088 states and 37529 transitions. [2020-12-22 09:56:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:17,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 09:56:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:17,870 INFO L225 Difference]: With dead ends: 26088 [2020-12-22 09:56:17,870 INFO L226 Difference]: Without dead ends: 24584 [2020-12-22 09:56:17,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24584 states. [2020-12-22 09:56:19,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24584 to 24584. [2020-12-22 09:56:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-12-22 09:56:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 34422 transitions. [2020-12-22 09:56:19,455 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 34422 transitions. Word has length 95 [2020-12-22 09:56:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:19,456 INFO L481 AbstractCegarLoop]: Abstraction has 24584 states and 34422 transitions. [2020-12-22 09:56:19,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 34422 transitions. [2020-12-22 09:56:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:56:19,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:19,463 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:19,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:56:19,464 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:19,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2020-12-22 09:56:19,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:19,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152663708] [2020-12-22 09:56:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:19,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152663708] [2020-12-22 09:56:19,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552259301] [2020-12-22 09:56:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:56:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:19,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 09:56:19,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:56:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:56:20,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:56:20,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:56:20,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241995700] [2020-12-22 09:56:20,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 09:56:20,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:20,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 09:56:20,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 09:56:20,299 INFO L87 Difference]: Start difference. First operand 24584 states and 34422 transitions. Second operand 21 states. [2020-12-22 09:56:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:34,557 INFO L93 Difference]: Finished difference Result 141385 states and 195903 transitions. [2020-12-22 09:56:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:56:34,557 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 09:56:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:34,965 INFO L225 Difference]: With dead ends: 141385 [2020-12-22 09:56:34,966 INFO L226 Difference]: Without dead ends: 119847 [2020-12-22 09:56:35,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2354, Invalid=10078, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 09:56:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119847 states. [2020-12-22 09:56:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119847 to 75264. [2020-12-22 09:56:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75264 states. [2020-12-22 09:56:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75264 states to 75264 states and 103830 transitions. [2020-12-22 09:56:42,087 INFO L78 Accepts]: Start accepts. Automaton has 75264 states and 103830 transitions. Word has length 96 [2020-12-22 09:56:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:42,087 INFO L481 AbstractCegarLoop]: Abstraction has 75264 states and 103830 transitions. [2020-12-22 09:56:42,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 09:56:42,087 INFO L276 IsEmpty]: Start isEmpty. Operand 75264 states and 103830 transitions. [2020-12-22 09:56:42,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:56:42,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:42,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:42,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:56:42,310 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:42,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:42,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1879245087, now seen corresponding path program 1 times [2020-12-22 09:56:42,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:42,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270695026] [2020-12-22 09:56:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:42,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270695026] [2020-12-22 09:56:42,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812952995] [2020-12-22 09:56:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:56:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:42,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:56:42,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:56:42,926 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:56:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:43,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:56:43,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:56:43,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327532002] [2020-12-22 09:56:43,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:56:43,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:56:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:56:43,312 INFO L87 Difference]: Start difference. First operand 75264 states and 103830 transitions. Second operand 17 states. [2020-12-22 09:56:44,965 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-22 09:56:46,727 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:56:47,212 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:56:48,100 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:56:48,927 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:58:12,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:12,834 INFO L93 Difference]: Finished difference Result 951470 states and 1295905 transitions. [2020-12-22 09:58:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:58:12,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 09:58:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:15,060 INFO L225 Difference]: With dead ends: 951470 [2020-12-22 09:58:15,060 INFO L226 Difference]: Without dead ends: 879252 [2020-12-22 09:58:15,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6261 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2263, Invalid=14249, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 09:58:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879252 states. [2020-12-22 09:58:53,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879252 to 338020. [2020-12-22 09:58:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338020 states. [2020-12-22 09:58:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338020 states to 338020 states and 460894 transitions. [2020-12-22 09:58:54,596 INFO L78 Accepts]: Start accepts. Automaton has 338020 states and 460894 transitions. Word has length 97 [2020-12-22 09:58:54,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:54,596 INFO L481 AbstractCegarLoop]: Abstraction has 338020 states and 460894 transitions. [2020-12-22 09:58:54,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:58:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 338020 states and 460894 transitions. [2020-12-22 09:58:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:58:54,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:54,612 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:54,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:58:54,813 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:54,814 INFO L82 PathProgramCache]: Analyzing trace with hash -135405655, now seen corresponding path program 1 times [2020-12-22 09:58:54,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:54,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166865225] [2020-12-22 09:58:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:54,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166865225] [2020-12-22 09:58:54,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:54,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:54,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7295240] [2020-12-22 09:58:54,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:54,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:54,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:54,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:54,881 INFO L87 Difference]: Start difference. First operand 338020 states and 460894 transitions. Second operand 3 states.