/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:18:52,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:18:52,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:18:52,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:18:52,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:18:52,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:18:52,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:18:52,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:18:52,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:18:52,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:18:52,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:18:52,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:18:52,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:18:52,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:18:52,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:18:52,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:18:52,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:18:52,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:18:52,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:18:52,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:18:52,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:18:52,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:18:52,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:18:52,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:18:52,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:18:52,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:18:52,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:18:52,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:18:52,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:18:52,531 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:18:52,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:18:52,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:18:52,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:18:52,536 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:18:52,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:18:52,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:18:52,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:18:52,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:18:52,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:18:52,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:18:52,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:18:52,539 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:18:52,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:18:52,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:18:52,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:18:52,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:18:52,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:18:52,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:18:52,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:18:52,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:18:52,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:18:52,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:18:52,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:18:52,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:18:52,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:18:52,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:18:52,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:18:52,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:18:52,969 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:18:52,970 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:18:52,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label01.c [2020-12-22 10:18:53,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c26cb0e7/487fdfc0291641f4abcf90633905a56e/FLAG580f447d0 [2020-12-22 10:18:54,163 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:18:54,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label01.c [2020-12-22 10:18:54,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c26cb0e7/487fdfc0291641f4abcf90633905a56e/FLAG580f447d0 [2020-12-22 10:18:54,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c26cb0e7/487fdfc0291641f4abcf90633905a56e [2020-12-22 10:18:54,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:18:54,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:18:54,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:18:54,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:18:54,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:18:54,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:18:54" (1/1) ... [2020-12-22 10:18:54,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258badc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:54, skipping insertion in model container [2020-12-22 10:18:54,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:18:54" (1/1) ... [2020-12-22 10:18:54,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:18:54,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:18:55,459 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label01.c[26884,26897] [2020-12-22 10:18:55,538 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label01.c[32196,32209] [2020-12-22 10:18:56,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:18:56,446 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:18:56,541 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label01.c[26884,26897] [2020-12-22 10:18:56,553 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label01.c[32196,32209] [2020-12-22 10:18:57,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:18:57,250 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:18:57,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:57 WrapperNode [2020-12-22 10:18:57,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:18:57,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:18:57,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:18:57,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:18:57,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:57" (1/1) ... [2020-12-22 10:18:57,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:57" (1/1) ... [2020-12-22 10:18:57,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:18:57,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:18:57,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:18:57,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:18:57,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:57" (1/1) ... [2020-12-22 10:18:57,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:57" (1/1) ... [2020-12-22 10:18:57,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:57" (1/1) ... [2020-12-22 10:18:57,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:57" (1/1) ... [2020-12-22 10:18:58,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:57" (1/1) ... [2020-12-22 10:18:58,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:57" (1/1) ... [2020-12-22 10:18:58,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:57" (1/1) ... [2020-12-22 10:18:58,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:18:58,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:18:58,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:18:58,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:18:58,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:18:58,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:18:58,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:18:58,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:18:58,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:19:04,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:19:04,749 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:19:04,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:19:04 BoogieIcfgContainer [2020-12-22 10:19:04,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:19:04,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:19:04,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:19:04,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:19:04,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:18:54" (1/3) ... [2020-12-22 10:19:04,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8a893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:19:04, skipping insertion in model container [2020-12-22 10:19:04,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:57" (2/3) ... [2020-12-22 10:19:04,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8a893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:19:04, skipping insertion in model container [2020-12-22 10:19:04,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:19:04" (3/3) ... [2020-12-22 10:19:04,761 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label01.c [2020-12-22 10:19:04,768 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:19:04,774 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:19:04,793 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:19:04,827 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:19:04,828 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:19:04,828 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:19:04,828 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:19:04,828 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:19:04,828 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:19:04,828 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:19:04,829 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:19:04,863 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:19:04,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:19:04,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:04,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:04,876 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:04,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:04,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2107180874, now seen corresponding path program 1 times [2020-12-22 10:19:04,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:04,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791895992] [2020-12-22 10:19:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:05,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791895992] [2020-12-22 10:19:05,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:05,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:19:05,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816928842] [2020-12-22 10:19:05,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:19:05,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:05,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:19:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:19:05,232 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 2 states. [2020-12-22 10:19:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:05,331 INFO L93 Difference]: Finished difference Result 1859 states and 3512 transitions. [2020-12-22 10:19:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:19:05,333 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:19:05,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:05,369 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:19:05,370 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:19:05,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:19:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:19:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:19:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:19:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1688 transitions. [2020-12-22 10:19:05,499 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1688 transitions. Word has length 46 [2020-12-22 10:19:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:05,500 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1688 transitions. [2020-12-22 10:19:05,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:19:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1688 transitions. [2020-12-22 10:19:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:19:05,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:05,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:05,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:19:05,504 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:05,505 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:19:05,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:05,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919838525] [2020-12-22 10:19:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:05,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919838525] [2020-12-22 10:19:05,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:05,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:19:05,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992337895] [2020-12-22 10:19:05,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:19:05,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:05,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:19:05,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:19:05,754 INFO L87 Difference]: Start difference. First operand 897 states and 1688 transitions. Second operand 5 states. [2020-12-22 10:19:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:05,982 INFO L93 Difference]: Finished difference Result 977 states and 1813 transitions. [2020-12-22 10:19:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:19:05,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:19:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:05,989 INFO L225 Difference]: With dead ends: 977 [2020-12-22 10:19:05,989 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:19:05,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:19:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:19:06,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:19:06,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:19:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1627 transitions. [2020-12-22 10:19:06,020 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1627 transitions. Word has length 46 [2020-12-22 10:19:06,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:06,020 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1627 transitions. [2020-12-22 10:19:06,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:19:06,020 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1627 transitions. [2020-12-22 10:19:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 10:19:06,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:06,022 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] [2020-12-22 10:19:06,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:19:06,023 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:06,024 INFO L82 PathProgramCache]: Analyzing trace with hash 555727445, now seen corresponding path program 1 times [2020-12-22 10:19:06,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:06,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080508672] [2020-12-22 10:19:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:06,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080508672] [2020-12-22 10:19:06,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:06,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:19:06,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217595228] [2020-12-22 10:19:06,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:06,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:06,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:06,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:06,159 INFO L87 Difference]: Start difference. First operand 897 states and 1627 transitions. Second operand 3 states. [2020-12-22 10:19:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:11,272 INFO L93 Difference]: Finished difference Result 2401 states and 4500 transitions. [2020-12-22 10:19:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:11,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 10:19:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:11,283 INFO L225 Difference]: With dead ends: 2401 [2020-12-22 10:19:11,284 INFO L226 Difference]: Without dead ends: 1648 [2020-12-22 10:19:11,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:11,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-12-22 10:19:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1648. [2020-12-22 10:19:11,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1648 states. [2020-12-22 10:19:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 3002 transitions. [2020-12-22 10:19:11,351 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 3002 transitions. Word has length 48 [2020-12-22 10:19:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:11,351 INFO L481 AbstractCegarLoop]: Abstraction has 1648 states and 3002 transitions. [2020-12-22 10:19:11,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:11,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 3002 transitions. [2020-12-22 10:19:11,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:19:11,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:11,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:11,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:19:11,356 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:11,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:19:11,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:11,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322937344] [2020-12-22 10:19:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:11,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322937344] [2020-12-22 10:19:11,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:11,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:11,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107181727] [2020-12-22 10:19:11,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:11,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:11,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:11,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:11,544 INFO L87 Difference]: Start difference. First operand 1648 states and 3002 transitions. Second operand 3 states. [2020-12-22 10:19:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:11,601 INFO L93 Difference]: Finished difference Result 1794 states and 3234 transitions. [2020-12-22 10:19:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:11,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:19:11,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:11,615 INFO L225 Difference]: With dead ends: 1794 [2020-12-22 10:19:11,615 INFO L226 Difference]: Without dead ends: 1718 [2020-12-22 10:19:11,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-12-22 10:19:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1716. [2020-12-22 10:19:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2020-12-22 10:19:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 3111 transitions. [2020-12-22 10:19:11,665 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 3111 transitions. Word has length 106 [2020-12-22 10:19:11,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:11,666 INFO L481 AbstractCegarLoop]: Abstraction has 1716 states and 3111 transitions. [2020-12-22 10:19:11,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 3111 transitions. [2020-12-22 10:19:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:19:11,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:11,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:11,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:19:11,670 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:11,671 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:19:11,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:11,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948966751] [2020-12-22 10:19:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:11,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948966751] [2020-12-22 10:19:11,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:11,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:11,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258205819] [2020-12-22 10:19:11,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:11,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:11,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:11,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:11,814 INFO L87 Difference]: Start difference. First operand 1716 states and 3111 transitions. Second operand 3 states. [2020-12-22 10:19:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:11,867 INFO L93 Difference]: Finished difference Result 1992 states and 3551 transitions. [2020-12-22 10:19:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:11,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:19:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:11,886 INFO L225 Difference]: With dead ends: 1992 [2020-12-22 10:19:11,887 INFO L226 Difference]: Without dead ends: 1848 [2020-12-22 10:19:11,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2020-12-22 10:19:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1846. [2020-12-22 10:19:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1846 states. [2020-12-22 10:19:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 3318 transitions. [2020-12-22 10:19:11,964 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 3318 transitions. Word has length 106 [2020-12-22 10:19:11,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:11,965 INFO L481 AbstractCegarLoop]: Abstraction has 1846 states and 3318 transitions. [2020-12-22 10:19:11,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 3318 transitions. [2020-12-22 10:19:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:19:11,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:11,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:11,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:19:11,978 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:11,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:19:11,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:11,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180329837] [2020-12-22 10:19:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:12,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180329837] [2020-12-22 10:19:12,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:12,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:12,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793992817] [2020-12-22 10:19:12,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:12,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:12,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:12,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:12,216 INFO L87 Difference]: Start difference. First operand 1846 states and 3318 transitions. Second operand 3 states. [2020-12-22 10:19:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:12,294 INFO L93 Difference]: Finished difference Result 2370 states and 4152 transitions. [2020-12-22 10:19:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:12,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:19:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:12,318 INFO L225 Difference]: With dead ends: 2370 [2020-12-22 10:19:12,318 INFO L226 Difference]: Without dead ends: 2096 [2020-12-22 10:19:12,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-12-22 10:19:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2094. [2020-12-22 10:19:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 10:19:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3710 transitions. [2020-12-22 10:19:12,474 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3710 transitions. Word has length 106 [2020-12-22 10:19:12,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:12,475 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3710 transitions. [2020-12-22 10:19:12,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:12,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3710 transitions. [2020-12-22 10:19:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:19:12,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:12,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:12,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:19:12,484 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:12,484 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:19:12,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:12,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225829767] [2020-12-22 10:19:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:12,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225829767] [2020-12-22 10:19:12,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:12,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:12,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319091787] [2020-12-22 10:19:12,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:12,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:12,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:12,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:12,631 INFO L87 Difference]: Start difference. First operand 2094 states and 3710 transitions. Second operand 3 states. [2020-12-22 10:19:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:12,691 INFO L93 Difference]: Finished difference Result 3090 states and 5288 transitions. [2020-12-22 10:19:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:12,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:19:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:12,708 INFO L225 Difference]: With dead ends: 3090 [2020-12-22 10:19:12,708 INFO L226 Difference]: Without dead ends: 2568 [2020-12-22 10:19:12,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2020-12-22 10:19:12,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2566. [2020-12-22 10:19:12,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2566 states. [2020-12-22 10:19:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 4450 transitions. [2020-12-22 10:19:12,789 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 4450 transitions. Word has length 106 [2020-12-22 10:19:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:12,790 INFO L481 AbstractCegarLoop]: Abstraction has 2566 states and 4450 transitions. [2020-12-22 10:19:12,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 4450 transitions. [2020-12-22 10:19:12,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:19:12,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:12,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:12,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:19:12,792 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:12,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:12,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:19:12,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:12,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451811880] [2020-12-22 10:19:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:12,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451811880] [2020-12-22 10:19:12,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:12,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:19:12,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598311705] [2020-12-22 10:19:12,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:19:12,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:12,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:19:12,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:19:12,982 INFO L87 Difference]: Start difference. First operand 2566 states and 4450 transitions. Second operand 10 states. [2020-12-22 10:19:14,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:14,034 INFO L93 Difference]: Finished difference Result 18470 states and 29554 transitions. [2020-12-22 10:19:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:19:14,035 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:19:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:14,144 INFO L225 Difference]: With dead ends: 18470 [2020-12-22 10:19:14,145 INFO L226 Difference]: Without dead ends: 17476 [2020-12-22 10:19:14,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:19:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17476 states. [2020-12-22 10:19:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17476 to 3558. [2020-12-22 10:19:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3558 states. [2020-12-22 10:19:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 5986 transitions. [2020-12-22 10:19:14,490 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 5986 transitions. Word has length 106 [2020-12-22 10:19:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:14,491 INFO L481 AbstractCegarLoop]: Abstraction has 3558 states and 5986 transitions. [2020-12-22 10:19:14,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:19:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 5986 transitions. [2020-12-22 10:19:14,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:19:14,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:14,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:14,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:19:14,494 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:14,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:14,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:19:14,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:14,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121199471] [2020-12-22 10:19:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:14,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121199471] [2020-12-22 10:19:14,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:14,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:14,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274362986] [2020-12-22 10:19:14,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:14,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:14,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:14,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:14,605 INFO L87 Difference]: Start difference. First operand 3558 states and 5986 transitions. Second operand 3 states. [2020-12-22 10:19:14,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:14,909 INFO L93 Difference]: Finished difference Result 6500 states and 10582 transitions. [2020-12-22 10:19:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:14,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:19:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:14,922 INFO L225 Difference]: With dead ends: 6500 [2020-12-22 10:19:14,923 INFO L226 Difference]: Without dead ends: 4514 [2020-12-22 10:19:14,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2020-12-22 10:19:15,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 4512. [2020-12-22 10:19:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4512 states. [2020-12-22 10:19:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 7452 transitions. [2020-12-22 10:19:15,177 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 7452 transitions. Word has length 108 [2020-12-22 10:19:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:15,182 INFO L481 AbstractCegarLoop]: Abstraction has 4512 states and 7452 transitions. [2020-12-22 10:19:15,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:15,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 7452 transitions. [2020-12-22 10:19:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:19:15,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:15,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:15,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:19:15,184 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:19:15,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:15,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823698866] [2020-12-22 10:19:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:15,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823698866] [2020-12-22 10:19:15,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:15,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:19:15,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594153349] [2020-12-22 10:19:15,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:19:15,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:15,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:19:15,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:19:15,625 INFO L87 Difference]: Start difference. First operand 4512 states and 7452 transitions. Second operand 10 states. [2020-12-22 10:19:16,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:16,339 INFO L93 Difference]: Finished difference Result 7452 states and 12022 transitions. [2020-12-22 10:19:16,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:19:16,339 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:19:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:16,351 INFO L225 Difference]: With dead ends: 7452 [2020-12-22 10:19:16,351 INFO L226 Difference]: Without dead ends: 4514 [2020-12-22 10:19:16,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:19:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2020-12-22 10:19:16,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 4512. [2020-12-22 10:19:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4512 states. [2020-12-22 10:19:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 7428 transitions. [2020-12-22 10:19:16,578 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 7428 transitions. Word has length 108 [2020-12-22 10:19:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:16,579 INFO L481 AbstractCegarLoop]: Abstraction has 4512 states and 7428 transitions. [2020-12-22 10:19:16,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:19:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 7428 transitions. [2020-12-22 10:19:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:19:16,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:16,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:16,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:19:16,581 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:16,581 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:19:16,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:16,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170890424] [2020-12-22 10:19:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:16,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170890424] [2020-12-22 10:19:16,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:16,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:16,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360960207] [2020-12-22 10:19:16,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:16,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:16,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:16,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:16,685 INFO L87 Difference]: Start difference. First operand 4512 states and 7428 transitions. Second operand 3 states. [2020-12-22 10:19:17,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:17,025 INFO L93 Difference]: Finished difference Result 10100 states and 16038 transitions. [2020-12-22 10:19:17,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:17,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:19:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:17,043 INFO L225 Difference]: With dead ends: 10100 [2020-12-22 10:19:17,043 INFO L226 Difference]: Without dead ends: 7162 [2020-12-22 10:19:17,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7162 states. [2020-12-22 10:19:17,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7162 to 7160. [2020-12-22 10:19:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7160 states. [2020-12-22 10:19:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 11444 transitions. [2020-12-22 10:19:17,442 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 11444 transitions. Word has length 108 [2020-12-22 10:19:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:17,443 INFO L481 AbstractCegarLoop]: Abstraction has 7160 states and 11444 transitions. [2020-12-22 10:19:17,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 11444 transitions. [2020-12-22 10:19:17,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:19:17,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:17,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:17,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:19:17,446 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:19:17,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:17,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837861097] [2020-12-22 10:19:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:17,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837861097] [2020-12-22 10:19:17,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:17,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:17,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145754014] [2020-12-22 10:19:17,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:17,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:17,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:17,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:17,544 INFO L87 Difference]: Start difference. First operand 7160 states and 11444 transitions. Second operand 3 states. [2020-12-22 10:19:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:18,194 INFO L93 Difference]: Finished difference Result 17756 states and 27606 transitions. [2020-12-22 10:19:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:18,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:19:18,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:18,221 INFO L225 Difference]: With dead ends: 17756 [2020-12-22 10:19:18,221 INFO L226 Difference]: Without dead ends: 12170 [2020-12-22 10:19:18,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-12-22 10:19:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 12168. [2020-12-22 10:19:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-12-22 10:19:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 18948 transitions. [2020-12-22 10:19:19,063 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 18948 transitions. Word has length 108 [2020-12-22 10:19:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:19,064 INFO L481 AbstractCegarLoop]: Abstraction has 12168 states and 18948 transitions. [2020-12-22 10:19:19,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 18948 transitions. [2020-12-22 10:19:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:19:19,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:19,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:19,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:19:19,066 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:19,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:19,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:19:19,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:19,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310619761] [2020-12-22 10:19:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:19,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310619761] [2020-12-22 10:19:19,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:19,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:19,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157862691] [2020-12-22 10:19:19,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:19,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:19,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:19,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:19,191 INFO L87 Difference]: Start difference. First operand 12168 states and 18948 transitions. Second operand 3 states. [2020-12-22 10:19:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:20,102 INFO L93 Difference]: Finished difference Result 32204 states and 49158 transitions. [2020-12-22 10:19:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:20,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:19:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:20,149 INFO L225 Difference]: With dead ends: 32204 [2020-12-22 10:19:20,149 INFO L226 Difference]: Without dead ends: 21610 [2020-12-22 10:19:20,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21610 states. [2020-12-22 10:19:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21610 to 21608. [2020-12-22 10:19:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21608 states. [2020-12-22 10:19:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21608 states to 21608 states and 32900 transitions. [2020-12-22 10:19:21,343 INFO L78 Accepts]: Start accepts. Automaton has 21608 states and 32900 transitions. Word has length 108 [2020-12-22 10:19:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:21,343 INFO L481 AbstractCegarLoop]: Abstraction has 21608 states and 32900 transitions. [2020-12-22 10:19:21,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 21608 states and 32900 transitions. [2020-12-22 10:19:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:19:21,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:21,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:21,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:19:21,346 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:19:21,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:21,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522694829] [2020-12-22 10:19:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:21,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522694829] [2020-12-22 10:19:21,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:21,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:21,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300585691] [2020-12-22 10:19:21,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:21,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:21,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:21,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:21,431 INFO L87 Difference]: Start difference. First operand 21608 states and 32900 transitions. Second operand 3 states. [2020-12-22 10:19:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:23,019 INFO L93 Difference]: Finished difference Result 59372 states and 89094 transitions. [2020-12-22 10:19:23,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:23,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:19:23,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:23,088 INFO L225 Difference]: With dead ends: 59372 [2020-12-22 10:19:23,088 INFO L226 Difference]: Without dead ends: 39338 [2020-12-22 10:19:23,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:23,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39338 states. [2020-12-22 10:19:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39338 to 39336. [2020-12-22 10:19:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39336 states. [2020-12-22 10:19:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39336 states to 39336 states and 58692 transitions. [2020-12-22 10:19:25,203 INFO L78 Accepts]: Start accepts. Automaton has 39336 states and 58692 transitions. Word has length 108 [2020-12-22 10:19:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:25,203 INFO L481 AbstractCegarLoop]: Abstraction has 39336 states and 58692 transitions. [2020-12-22 10:19:25,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 39336 states and 58692 transitions. [2020-12-22 10:19:25,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:19:25,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:25,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:25,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:19:25,205 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:25,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:19:25,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:25,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871240594] [2020-12-22 10:19:25,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:25,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871240594] [2020-12-22 10:19:25,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:25,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:19:25,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668175307] [2020-12-22 10:19:25,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:19:25,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:25,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:19:25,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:19:25,336 INFO L87 Difference]: Start difference. First operand 39336 states and 58692 transitions. Second operand 8 states. [2020-12-22 10:19:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:29,291 INFO L93 Difference]: Finished difference Result 71503 states and 105269 transitions. [2020-12-22 10:19:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:19:29,292 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:19:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:29,429 INFO L225 Difference]: With dead ends: 71503 [2020-12-22 10:19:29,429 INFO L226 Difference]: Without dead ends: 71501 [2020-12-22 10:19:29,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:19:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71501 states. [2020-12-22 10:19:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71501 to 40872. [2020-12-22 10:19:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40872 states. [2020-12-22 10:19:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40872 states to 40872 states and 60100 transitions. [2020-12-22 10:19:32,454 INFO L78 Accepts]: Start accepts. Automaton has 40872 states and 60100 transitions. Word has length 109 [2020-12-22 10:19:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:32,454 INFO L481 AbstractCegarLoop]: Abstraction has 40872 states and 60100 transitions. [2020-12-22 10:19:32,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:19:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 40872 states and 60100 transitions. [2020-12-22 10:19:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 10:19:32,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:32,456 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:32,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:19:32,457 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1519320962, now seen corresponding path program 1 times [2020-12-22 10:19:32,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:32,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497026907] [2020-12-22 10:19:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:32,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497026907] [2020-12-22 10:19:32,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:32,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:19:32,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977673881] [2020-12-22 10:19:32,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:32,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:32,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:32,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:32,580 INFO L87 Difference]: Start difference. First operand 40872 states and 60100 transitions. Second operand 3 states. [2020-12-22 10:19:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:39,982 INFO L93 Difference]: Finished difference Result 43880 states and 65724 transitions. [2020-12-22 10:19:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:39,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 10:19:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:40,043 INFO L225 Difference]: With dead ends: 43880 [2020-12-22 10:19:40,044 INFO L226 Difference]: Without dead ends: 42376 [2020-12-22 10:19:40,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2020-12-22 10:19:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 42374. [2020-12-22 10:19:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42374 states. [2020-12-22 10:19:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42374 states to 42374 states and 62041 transitions. [2020-12-22 10:19:42,343 INFO L78 Accepts]: Start accepts. Automaton has 42374 states and 62041 transitions. Word has length 121 [2020-12-22 10:19:42,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:42,343 INFO L481 AbstractCegarLoop]: Abstraction has 42374 states and 62041 transitions. [2020-12-22 10:19:42,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 42374 states and 62041 transitions. [2020-12-22 10:19:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 10:19:42,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:42,345 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:42,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:19:42,346 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:42,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:42,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1871237977, now seen corresponding path program 1 times [2020-12-22 10:19:42,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:42,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922017674] [2020-12-22 10:19:42,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:42,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922017674] [2020-12-22 10:19:42,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:42,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:19:42,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671375051] [2020-12-22 10:19:42,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:42,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:42,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:42,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:42,429 INFO L87 Difference]: Start difference. First operand 42374 states and 62041 transitions. Second operand 3 states. [2020-12-22 10:19:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:49,580 INFO L93 Difference]: Finished difference Result 48384 states and 71546 transitions. [2020-12-22 10:19:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:49,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2020-12-22 10:19:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:49,643 INFO L225 Difference]: With dead ends: 48384 [2020-12-22 10:19:49,643 INFO L226 Difference]: Without dead ends: 45378 [2020-12-22 10:19:49,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45378 states. [2020-12-22 10:19:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45378 to 45378. [2020-12-22 10:19:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45378 states. [2020-12-22 10:19:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45378 states to 45378 states and 65713 transitions. [2020-12-22 10:19:52,208 INFO L78 Accepts]: Start accepts. Automaton has 45378 states and 65713 transitions. Word has length 123 [2020-12-22 10:19:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:52,208 INFO L481 AbstractCegarLoop]: Abstraction has 45378 states and 65713 transitions. [2020-12-22 10:19:52,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 45378 states and 65713 transitions. [2020-12-22 10:19:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 10:19:52,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:52,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:52,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:19:52,211 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:52,211 INFO L82 PathProgramCache]: Analyzing trace with hash -977766964, now seen corresponding path program 1 times [2020-12-22 10:19:52,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:52,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774431393] [2020-12-22 10:19:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:52,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774431393] [2020-12-22 10:19:52,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:52,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:52,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627890209] [2020-12-22 10:19:52,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:19:52,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:52,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:19:52,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:19:52,349 INFO L87 Difference]: Start difference. First operand 45378 states and 65713 transitions. Second operand 4 states. [2020-12-22 10:20:02,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:02,936 INFO L93 Difference]: Finished difference Result 58147 states and 83397 transitions. [2020-12-22 10:20:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:20:02,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-22 10:20:02,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:03,005 INFO L225 Difference]: With dead ends: 58147 [2020-12-22 10:20:03,006 INFO L226 Difference]: Without dead ends: 52137 [2020-12-22 10:20:03,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:20:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52137 states. [2020-12-22 10:20:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52137 to 51386. [2020-12-22 10:20:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51386 states. [2020-12-22 10:20:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51386 states to 51386 states and 73365 transitions. [2020-12-22 10:20:05,723 INFO L78 Accepts]: Start accepts. Automaton has 51386 states and 73365 transitions. Word has length 125 [2020-12-22 10:20:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:05,723 INFO L481 AbstractCegarLoop]: Abstraction has 51386 states and 73365 transitions. [2020-12-22 10:20:05,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:20:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 51386 states and 73365 transitions. [2020-12-22 10:20:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:20:05,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:05,746 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:05,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:20:05,747 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:05,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:05,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:20:05,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:05,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490535356] [2020-12-22 10:20:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 10:20:05,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490535356] [2020-12-22 10:20:05,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:05,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:05,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004601991] [2020-12-22 10:20:05,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:05,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:05,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:05,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:05,966 INFO L87 Difference]: Start difference. First operand 51386 states and 73365 transitions. Second operand 10 states. [2020-12-22 10:20:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:24,498 INFO L93 Difference]: Finished difference Result 373324 states and 541662 transitions. [2020-12-22 10:20:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:24,499 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:20:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:25,101 INFO L225 Difference]: With dead ends: 373324 [2020-12-22 10:20:25,101 INFO L226 Difference]: Without dead ends: 334026 [2020-12-22 10:20:25,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:20:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334026 states. [2020-12-22 10:20:33,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334026 to 90682. [2020-12-22 10:20:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90682 states. [2020-12-22 10:20:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90682 states to 90682 states and 130197 transitions. [2020-12-22 10:20:33,373 INFO L78 Accepts]: Start accepts. Automaton has 90682 states and 130197 transitions. Word has length 149 [2020-12-22 10:20:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:33,374 INFO L481 AbstractCegarLoop]: Abstraction has 90682 states and 130197 transitions. [2020-12-22 10:20:33,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:20:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 90682 states and 130197 transitions. [2020-12-22 10:20:33,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:20:33,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:33,405 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:33,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:20:33,405 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:33,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:20:33,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:33,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743420531] [2020-12-22 10:20:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:20:33,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743420531] [2020-12-22 10:20:33,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:33,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:33,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890508344] [2020-12-22 10:20:33,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:33,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:33,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:33,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:33,675 INFO L87 Difference]: Start difference. First operand 90682 states and 130197 transitions. Second operand 10 states. [2020-12-22 10:20:58,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:58,198 INFO L93 Difference]: Finished difference Result 412620 states and 598494 transitions. [2020-12-22 10:20:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:58,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:20:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:58,752 INFO L225 Difference]: With dead ends: 412620 [2020-12-22 10:20:58,752 INFO L226 Difference]: Without dead ends: 373322 [2020-12-22 10:20:58,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:20:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373322 states. [2020-12-22 10:21:11,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373322 to 149690. [2020-12-22 10:21:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149690 states. [2020-12-22 10:21:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149690 states to 149690 states and 215125 transitions. [2020-12-22 10:21:11,944 INFO L78 Accepts]: Start accepts. Automaton has 149690 states and 215125 transitions. Word has length 149 [2020-12-22 10:21:11,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:11,945 INFO L481 AbstractCegarLoop]: Abstraction has 149690 states and 215125 transitions. [2020-12-22 10:21:11,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 149690 states and 215125 transitions. [2020-12-22 10:21:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:21:11,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:11,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:11,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:21:11,978 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:11,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:21:11,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:11,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271561377] [2020-12-22 10:21:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:21:12,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271561377] [2020-12-22 10:21:12,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:12,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:12,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698196005] [2020-12-22 10:21:12,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:12,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:12,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:12,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:12,198 INFO L87 Difference]: Start difference. First operand 149690 states and 215125 transitions. Second operand 10 states. [2020-12-22 10:21:41,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:41,414 INFO L93 Difference]: Finished difference Result 451916 states and 655326 transitions. [2020-12-22 10:21:41,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:41,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:21:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:42,308 INFO L225 Difference]: With dead ends: 451916 [2020-12-22 10:21:42,309 INFO L226 Difference]: Without dead ends: 412618 [2020-12-22 10:21:42,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:21:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412618 states.