/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.ufo.BOUNDED-16.pals+Problem12_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:22:44,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:22:44,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:22:44,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:22:44,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:22:44,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:22:44,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:22:44,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:22:44,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:22:44,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:22:44,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:22:44,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:22:44,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:22:44,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:22:44,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:22:44,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:22:44,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:22:44,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:22:44,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:22:44,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:22:44,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:22:44,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:22:44,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:22:44,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:22:44,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:22:44,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:22:44,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:22:44,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:22:44,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:22:44,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:22:44,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:22:44,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:22:44,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:22:44,934 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:22:44,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:22:44,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:22:44,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:22:44,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:22:44,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:22:44,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:22:44,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:22:44,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:22:44,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:22:44,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:22:44,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:22:44,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:22:44,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:22:44,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:22:44,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:22:44,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:22:44,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:22:44,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:22:44,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:22:44,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:22:44,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:22:45,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:22:45,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:22:45,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:22:45,324 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:22:45,325 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:22:45,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label06.c [2020-12-22 10:22:45,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0db604953/8a837fce7764437ebdcc09e1efae082d/FLAG217c0f766 [2020-12-22 10:22:46,369 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:22:46,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label06.c [2020-12-22 10:22:46,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0db604953/8a837fce7764437ebdcc09e1efae082d/FLAG217c0f766 [2020-12-22 10:22:46,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0db604953/8a837fce7764437ebdcc09e1efae082d [2020-12-22 10:22:46,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:22:46,859 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:22:46,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:22:46,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:22:46,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:22:46,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:22:46" (1/1) ... [2020-12-22 10:22:46,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3937bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:46, skipping insertion in model container [2020-12-22 10:22:46,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:22:46" (1/1) ... [2020-12-22 10:22:46,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:22:47,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:22:47,600 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.ufo.BOUNDED-16.pals+Problem12_label06.c[26847,26860] [2020-12-22 10:22:47,674 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.ufo.BOUNDED-16.pals+Problem12_label06.c[29421,29434] [2020-12-22 10:22:48,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:22:48,696 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:22:48,793 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.ufo.BOUNDED-16.pals+Problem12_label06.c[26847,26860] [2020-12-22 10:22:48,800 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.ufo.BOUNDED-16.pals+Problem12_label06.c[29421,29434] [2020-12-22 10:22:49,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:22:49,451 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:22:49,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:49 WrapperNode [2020-12-22 10:22:49,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:22:49,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:22:49,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:22:49,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:22:49,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:49" (1/1) ... [2020-12-22 10:22:49,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:49" (1/1) ... [2020-12-22 10:22:50,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:22:50,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:22:50,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:22:50,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:22:50,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:49" (1/1) ... [2020-12-22 10:22:50,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:49" (1/1) ... [2020-12-22 10:22:50,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:49" (1/1) ... [2020-12-22 10:22:50,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:49" (1/1) ... [2020-12-22 10:22:50,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:49" (1/1) ... [2020-12-22 10:22:50,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:49" (1/1) ... [2020-12-22 10:22:50,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:49" (1/1) ... [2020-12-22 10:22:50,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:22:50,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:22:50,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:22:50,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:22:50,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:49" (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 10:22:51,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:22:51,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:22:51,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:22:51,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:22:57,103 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:22:57,104 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:22:57,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:22:57 BoogieIcfgContainer [2020-12-22 10:22:57,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:22:57,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:22:57,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:22:57,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:22:57,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:22:46" (1/3) ... [2020-12-22 10:22:57,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7fa1fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:22:57, skipping insertion in model container [2020-12-22 10:22:57,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:49" (2/3) ... [2020-12-22 10:22:57,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7fa1fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:22:57, skipping insertion in model container [2020-12-22 10:22:57,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:22:57" (3/3) ... [2020-12-22 10:22:57,118 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label06.c [2020-12-22 10:22:57,125 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:22:57,132 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:22:57,152 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:22:57,189 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:22:57,189 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:22:57,189 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:22:57,189 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:22:57,189 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:22:57,190 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:22:57,190 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:22:57,190 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:22:57,235 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:22:57,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:22:57,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:57,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:57,248 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1031297163, now seen corresponding path program 1 times [2020-12-22 10:22:57,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:57,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805622688] [2020-12-22 10:22:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:57,656 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 10:22:57,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805622688] [2020-12-22 10:22:57,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:57,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:22:57,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695621252] [2020-12-22 10:22:57,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:57,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:57,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:57,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:57,691 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 3 states. [2020-12-22 10:23:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:04,127 INFO L93 Difference]: Finished difference Result 2614 states and 5014 transitions. [2020-12-22 10:23:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:04,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 10:23:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:04,183 INFO L225 Difference]: With dead ends: 2614 [2020-12-22 10:23:04,184 INFO L226 Difference]: Without dead ends: 1648 [2020-12-22 10:23:04,195 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 10:23:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-12-22 10:23:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1648. [2020-12-22 10:23:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1648 states. [2020-12-22 10:23:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2715 transitions. [2020-12-22 10:23:04,386 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2715 transitions. Word has length 24 [2020-12-22 10:23:04,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:04,386 INFO L481 AbstractCegarLoop]: Abstraction has 1648 states and 2715 transitions. [2020-12-22 10:23:04,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2715 transitions. [2020-12-22 10:23:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:23:04,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:04,390 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 10:23:04,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:23:04,391 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:23:04,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:04,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832143974] [2020-12-22 10:23:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:04,520 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 10:23:04,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832143974] [2020-12-22 10:23:04,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:04,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:23:04,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716204398] [2020-12-22 10:23:04,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:23:04,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:04,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:23:04,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:23:04,529 INFO L87 Difference]: Start difference. First operand 1648 states and 2715 transitions. Second operand 5 states. [2020-12-22 10:23:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:04,700 INFO L93 Difference]: Finished difference Result 1728 states and 2840 transitions. [2020-12-22 10:23:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:23:04,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:23:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:04,712 INFO L225 Difference]: With dead ends: 1728 [2020-12-22 10:23:04,712 INFO L226 Difference]: Without dead ends: 1648 [2020-12-22 10:23:04,715 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 10:23:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-12-22 10:23:04,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1648. [2020-12-22 10:23:04,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1648 states. [2020-12-22 10:23:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2654 transitions. [2020-12-22 10:23:04,766 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2654 transitions. Word has length 46 [2020-12-22 10:23:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:04,767 INFO L481 AbstractCegarLoop]: Abstraction has 1648 states and 2654 transitions. [2020-12-22 10:23:04,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:23:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2654 transitions. [2020-12-22 10:23:04,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:23:04,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:04,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:04,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:23:04,773 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:04,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:04,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1346326019, now seen corresponding path program 1 times [2020-12-22 10:23:04,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:04,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089226787] [2020-12-22 10:23:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:23:05,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089226787] [2020-12-22 10:23:05,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539450239] [2020-12-22 10:23:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:23:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:05,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 10:23:05,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:23:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:23:05,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 10:23:05,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 10:23:05,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048956678] [2020-12-22 10:23:05,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:05,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:05,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:05,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:23:05,450 INFO L87 Difference]: Start difference. First operand 1648 states and 2654 transitions. Second operand 3 states. [2020-12-22 10:23:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:11,520 INFO L93 Difference]: Finished difference Result 4654 states and 7581 transitions. [2020-12-22 10:23:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:11,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:23:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:11,551 INFO L225 Difference]: With dead ends: 4654 [2020-12-22 10:23:11,551 INFO L226 Difference]: Without dead ends: 3150 [2020-12-22 10:23:11,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:23:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2020-12-22 10:23:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 3150. [2020-12-22 10:23:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3150 states. [2020-12-22 10:23:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 4474 transitions. [2020-12-22 10:23:11,639 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 4474 transitions. Word has length 95 [2020-12-22 10:23:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:11,640 INFO L481 AbstractCegarLoop]: Abstraction has 3150 states and 4474 transitions. [2020-12-22 10:23:11,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 4474 transitions. [2020-12-22 10:23:11,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 10:23:11,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:11,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:11,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 10:23:11,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:11,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1184591431, now seen corresponding path program 1 times [2020-12-22 10:23:11,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:11,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207961140] [2020-12-22 10:23:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:23:12,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207961140] [2020-12-22 10:23:12,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:12,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:23:12,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053239049] [2020-12-22 10:23:12,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:12,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:12,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:12,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:12,066 INFO L87 Difference]: Start difference. First operand 3150 states and 4474 transitions. Second operand 3 states. [2020-12-22 10:23:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:18,311 INFO L93 Difference]: Finished difference Result 9160 states and 13041 transitions. [2020-12-22 10:23:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:18,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-12-22 10:23:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:18,340 INFO L225 Difference]: With dead ends: 9160 [2020-12-22 10:23:18,340 INFO L226 Difference]: Without dead ends: 6154 [2020-12-22 10:23:18,346 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 10:23:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2020-12-22 10:23:18,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 6154. [2020-12-22 10:23:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6154 states. [2020-12-22 10:23:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 7971 transitions. [2020-12-22 10:23:18,477 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 7971 transitions. Word has length 99 [2020-12-22 10:23:18,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:18,478 INFO L481 AbstractCegarLoop]: Abstraction has 6154 states and 7971 transitions. [2020-12-22 10:23:18,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 7971 transitions. [2020-12-22 10:23:18,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 10:23:18,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:18,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:18,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:23:18,481 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:18,481 INFO L82 PathProgramCache]: Analyzing trace with hash 879254198, now seen corresponding path program 1 times [2020-12-22 10:23:18,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:18,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408440474] [2020-12-22 10:23:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:23:18,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408440474] [2020-12-22 10:23:18,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:18,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:18,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940649243] [2020-12-22 10:23:18,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:23:18,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:18,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:23:18,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:23:18,733 INFO L87 Difference]: Start difference. First operand 6154 states and 7971 transitions. Second operand 4 states. [2020-12-22 10:23:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:27,828 INFO L93 Difference]: Finished difference Result 16670 states and 20816 transitions. [2020-12-22 10:23:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:23:27,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 10:23:27,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:27,868 INFO L225 Difference]: With dead ends: 16670 [2020-12-22 10:23:27,868 INFO L226 Difference]: Without dead ends: 10660 [2020-12-22 10:23:27,877 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 10:23:27,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10660 states. [2020-12-22 10:23:28,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10660 to 9909. [2020-12-22 10:23:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9909 states. [2020-12-22 10:23:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9909 states to 9909 states and 12020 transitions. [2020-12-22 10:23:28,069 INFO L78 Accepts]: Start accepts. Automaton has 9909 states and 12020 transitions. Word has length 105 [2020-12-22 10:23:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:28,070 INFO L481 AbstractCegarLoop]: Abstraction has 9909 states and 12020 transitions. [2020-12-22 10:23:28,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:23:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 9909 states and 12020 transitions. [2020-12-22 10:23:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:23:28,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:28,074 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 10:23:28,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:23:28,074 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:28,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:28,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:23:28,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:28,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318343454] [2020-12-22 10:23:28,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:28,240 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 10:23:28,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318343454] [2020-12-22 10:23:28,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:28,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:28,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525004991] [2020-12-22 10:23:28,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:28,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:28,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:28,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:28,243 INFO L87 Difference]: Start difference. First operand 9909 states and 12020 transitions. Second operand 3 states. [2020-12-22 10:23:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:28,320 INFO L93 Difference]: Finished difference Result 10055 states and 12252 transitions. [2020-12-22 10:23:28,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:28,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:23:28,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:28,372 INFO L225 Difference]: With dead ends: 10055 [2020-12-22 10:23:28,373 INFO L226 Difference]: Without dead ends: 9979 [2020-12-22 10:23:28,376 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 10:23:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9979 states. [2020-12-22 10:23:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9979 to 9977. [2020-12-22 10:23:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9977 states. [2020-12-22 10:23:28,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9977 states to 9977 states and 12129 transitions. [2020-12-22 10:23:28,556 INFO L78 Accepts]: Start accepts. Automaton has 9977 states and 12129 transitions. Word has length 106 [2020-12-22 10:23:28,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:28,557 INFO L481 AbstractCegarLoop]: Abstraction has 9977 states and 12129 transitions. [2020-12-22 10:23:28,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 9977 states and 12129 transitions. [2020-12-22 10:23:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:23:28,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:28,559 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 10:23:28,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:23:28,559 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:28,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:28,560 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:23:28,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:28,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289962835] [2020-12-22 10:23:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:23:28,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289962835] [2020-12-22 10:23:28,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:28,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:28,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19163035] [2020-12-22 10:23:28,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:28,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:28,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:28,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:28,653 INFO L87 Difference]: Start difference. First operand 9977 states and 12129 transitions. Second operand 3 states. [2020-12-22 10:23:28,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:28,724 INFO L93 Difference]: Finished difference Result 10253 states and 12569 transitions. [2020-12-22 10:23:28,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:28,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:23:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:28,748 INFO L225 Difference]: With dead ends: 10253 [2020-12-22 10:23:28,749 INFO L226 Difference]: Without dead ends: 10109 [2020-12-22 10:23:28,753 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 10:23:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10109 states. [2020-12-22 10:23:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10109 to 10107. [2020-12-22 10:23:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10107 states. [2020-12-22 10:23:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 12336 transitions. [2020-12-22 10:23:28,924 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 12336 transitions. Word has length 106 [2020-12-22 10:23:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:28,924 INFO L481 AbstractCegarLoop]: Abstraction has 10107 states and 12336 transitions. [2020-12-22 10:23:28,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 12336 transitions. [2020-12-22 10:23:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:23:28,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:28,926 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 10:23:28,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:23:28,927 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:28,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:28,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:23:28,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:28,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966358351] [2020-12-22 10:23:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:29,031 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 10:23:29,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966358351] [2020-12-22 10:23:29,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:29,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:29,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085989727] [2020-12-22 10:23:29,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:29,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:29,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:29,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:29,035 INFO L87 Difference]: Start difference. First operand 10107 states and 12336 transitions. Second operand 3 states. [2020-12-22 10:23:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:29,112 INFO L93 Difference]: Finished difference Result 10631 states and 13170 transitions. [2020-12-22 10:23:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:29,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:23:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:29,134 INFO L225 Difference]: With dead ends: 10631 [2020-12-22 10:23:29,135 INFO L226 Difference]: Without dead ends: 10357 [2020-12-22 10:23:29,145 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 10:23:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10357 states. [2020-12-22 10:23:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10357 to 10355. [2020-12-22 10:23:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10355 states. [2020-12-22 10:23:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10355 states to 10355 states and 12728 transitions. [2020-12-22 10:23:29,453 INFO L78 Accepts]: Start accepts. Automaton has 10355 states and 12728 transitions. Word has length 106 [2020-12-22 10:23:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:29,454 INFO L481 AbstractCegarLoop]: Abstraction has 10355 states and 12728 transitions. [2020-12-22 10:23:29,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:29,454 INFO L276 IsEmpty]: Start isEmpty. Operand 10355 states and 12728 transitions. [2020-12-22 10:23:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:23:29,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:29,459 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 10:23:29,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:23:29,459 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:23:29,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:29,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93306507] [2020-12-22 10:23:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:29,556 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 10:23:29,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93306507] [2020-12-22 10:23:29,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:29,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:29,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803110729] [2020-12-22 10:23:29,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:29,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:29,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:29,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:29,559 INFO L87 Difference]: Start difference. First operand 10355 states and 12728 transitions. Second operand 3 states. [2020-12-22 10:23:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:29,646 INFO L93 Difference]: Finished difference Result 11351 states and 14306 transitions. [2020-12-22 10:23:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:29,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:23:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:29,668 INFO L225 Difference]: With dead ends: 11351 [2020-12-22 10:23:29,669 INFO L226 Difference]: Without dead ends: 10829 [2020-12-22 10:23:29,673 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 10:23:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10829 states. [2020-12-22 10:23:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10829 to 10827. [2020-12-22 10:23:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10827 states. [2020-12-22 10:23:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10827 states to 10827 states and 13468 transitions. [2020-12-22 10:23:29,860 INFO L78 Accepts]: Start accepts. Automaton has 10827 states and 13468 transitions. Word has length 106 [2020-12-22 10:23:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:29,861 INFO L481 AbstractCegarLoop]: Abstraction has 10827 states and 13468 transitions. [2020-12-22 10:23:29,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10827 states and 13468 transitions. [2020-12-22 10:23:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:23:29,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:29,863 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 10:23:29,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:23:29,863 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:29,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:29,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:23:29,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:29,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80820785] [2020-12-22 10:23:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:30,059 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 10:23:30,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80820785] [2020-12-22 10:23:30,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:30,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:30,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384135566] [2020-12-22 10:23:30,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:30,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:30,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:30,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:30,067 INFO L87 Difference]: Start difference. First operand 10827 states and 13468 transitions. Second operand 10 states. [2020-12-22 10:23:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:31,277 INFO L93 Difference]: Finished difference Result 26731 states and 38572 transitions. [2020-12-22 10:23:31,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:23:31,278 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:23:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:31,332 INFO L225 Difference]: With dead ends: 26731 [2020-12-22 10:23:31,332 INFO L226 Difference]: Without dead ends: 25737 [2020-12-22 10:23:31,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:23:31,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25737 states. [2020-12-22 10:23:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25737 to 11819. [2020-12-22 10:23:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11819 states. [2020-12-22 10:23:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11819 states to 11819 states and 15004 transitions. [2020-12-22 10:23:31,747 INFO L78 Accepts]: Start accepts. Automaton has 11819 states and 15004 transitions. Word has length 106 [2020-12-22 10:23:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:31,748 INFO L481 AbstractCegarLoop]: Abstraction has 11819 states and 15004 transitions. [2020-12-22 10:23:31,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 11819 states and 15004 transitions. [2020-12-22 10:23:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:31,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:31,749 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 10:23:31,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:23:31,750 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:31,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:31,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:23:31,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:31,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323845390] [2020-12-22 10:23:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:31,847 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 10:23:31,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323845390] [2020-12-22 10:23:31,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:31,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:31,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254495572] [2020-12-22 10:23:31,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:31,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:31,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:31,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:31,850 INFO L87 Difference]: Start difference. First operand 11819 states and 15004 transitions. Second operand 3 states. [2020-12-22 10:23:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:32,184 INFO L93 Difference]: Finished difference Result 14761 states and 19600 transitions. [2020-12-22 10:23:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:32,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:32,211 INFO L225 Difference]: With dead ends: 14761 [2020-12-22 10:23:32,211 INFO L226 Difference]: Without dead ends: 12775 [2020-12-22 10:23:32,218 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 10:23:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12775 states. [2020-12-22 10:23:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12775 to 12773. [2020-12-22 10:23:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12773 states. [2020-12-22 10:23:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12773 states to 12773 states and 16470 transitions. [2020-12-22 10:23:32,564 INFO L78 Accepts]: Start accepts. Automaton has 12773 states and 16470 transitions. Word has length 108 [2020-12-22 10:23:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:32,565 INFO L481 AbstractCegarLoop]: Abstraction has 12773 states and 16470 transitions. [2020-12-22 10:23:32,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 12773 states and 16470 transitions. [2020-12-22 10:23:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:32,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:32,567 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 10:23:32,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:23:32,567 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:32,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:23:32,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:32,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511634552] [2020-12-22 10:23:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:33,048 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 10:23:33,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511634552] [2020-12-22 10:23:33,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:33,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:33,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147463614] [2020-12-22 10:23:33,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:33,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:33,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:33,055 INFO L87 Difference]: Start difference. First operand 12773 states and 16470 transitions. Second operand 10 states. [2020-12-22 10:23:33,602 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 10:23:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:34,010 INFO L93 Difference]: Finished difference Result 15713 states and 21040 transitions. [2020-12-22 10:23:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:34,011 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:23:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:34,039 INFO L225 Difference]: With dead ends: 15713 [2020-12-22 10:23:34,039 INFO L226 Difference]: Without dead ends: 12775 [2020-12-22 10:23:34,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:23:34,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12775 states. [2020-12-22 10:23:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12775 to 12773. [2020-12-22 10:23:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12773 states. [2020-12-22 10:23:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12773 states to 12773 states and 16446 transitions. [2020-12-22 10:23:34,384 INFO L78 Accepts]: Start accepts. Automaton has 12773 states and 16446 transitions. Word has length 108 [2020-12-22 10:23:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:34,385 INFO L481 AbstractCegarLoop]: Abstraction has 12773 states and 16446 transitions. [2020-12-22 10:23:34,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:34,385 INFO L276 IsEmpty]: Start isEmpty. Operand 12773 states and 16446 transitions. [2020-12-22 10:23:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:34,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:34,386 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 10:23:34,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:23:34,387 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:34,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:34,387 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:23:34,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:34,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187063362] [2020-12-22 10:23:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:34,476 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 10:23:34,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187063362] [2020-12-22 10:23:34,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:34,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:34,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269725971] [2020-12-22 10:23:34,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:34,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:34,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:34,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:34,478 INFO L87 Difference]: Start difference. First operand 12773 states and 16446 transitions. Second operand 3 states. [2020-12-22 10:23:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:35,086 INFO L93 Difference]: Finished difference Result 18361 states and 25056 transitions. [2020-12-22 10:23:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:35,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:35,118 INFO L225 Difference]: With dead ends: 18361 [2020-12-22 10:23:35,118 INFO L226 Difference]: Without dead ends: 15423 [2020-12-22 10:23:35,126 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 10:23:35,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15423 states. [2020-12-22 10:23:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15423 to 15421. [2020-12-22 10:23:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15421 states. [2020-12-22 10:23:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15421 states to 15421 states and 20462 transitions. [2020-12-22 10:23:35,671 INFO L78 Accepts]: Start accepts. Automaton has 15421 states and 20462 transitions. Word has length 108 [2020-12-22 10:23:35,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:35,672 INFO L481 AbstractCegarLoop]: Abstraction has 15421 states and 20462 transitions. [2020-12-22 10:23:35,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 15421 states and 20462 transitions. [2020-12-22 10:23:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:35,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:35,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:35,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:23:35,674 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:35,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:35,674 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:23:35,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:35,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31865862] [2020-12-22 10:23:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:35,761 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 10:23:35,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31865862] [2020-12-22 10:23:35,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:35,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:35,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182963795] [2020-12-22 10:23:35,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:35,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:35,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:35,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:35,765 INFO L87 Difference]: Start difference. First operand 15421 states and 20462 transitions. Second operand 3 states. [2020-12-22 10:23:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:36,547 INFO L93 Difference]: Finished difference Result 26017 states and 36624 transitions. [2020-12-22 10:23:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:36,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:36,584 INFO L225 Difference]: With dead ends: 26017 [2020-12-22 10:23:36,584 INFO L226 Difference]: Without dead ends: 20431 [2020-12-22 10:23:36,597 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 10:23:36,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20431 states. [2020-12-22 10:23:37,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20431 to 20429. [2020-12-22 10:23:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20429 states. [2020-12-22 10:23:37,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20429 states to 20429 states and 27966 transitions. [2020-12-22 10:23:37,672 INFO L78 Accepts]: Start accepts. Automaton has 20429 states and 27966 transitions. Word has length 108 [2020-12-22 10:23:37,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:37,673 INFO L481 AbstractCegarLoop]: Abstraction has 20429 states and 27966 transitions. [2020-12-22 10:23:37,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:37,674 INFO L276 IsEmpty]: Start isEmpty. Operand 20429 states and 27966 transitions. [2020-12-22 10:23:37,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:37,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:37,676 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 10:23:37,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:23:37,676 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:37,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:23:37,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:37,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929556107] [2020-12-22 10:23:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:37,781 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 10:23:37,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929556107] [2020-12-22 10:23:37,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:37,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:37,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388894304] [2020-12-22 10:23:37,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:37,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:37,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:37,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:37,784 INFO L87 Difference]: Start difference. First operand 20429 states and 27966 transitions. Second operand 3 states. [2020-12-22 10:23:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:38,892 INFO L93 Difference]: Finished difference Result 40465 states and 58176 transitions. [2020-12-22 10:23:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:38,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:38,944 INFO L225 Difference]: With dead ends: 40465 [2020-12-22 10:23:38,944 INFO L226 Difference]: Without dead ends: 29871 [2020-12-22 10:23:38,962 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 10:23:38,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29871 states. [2020-12-22 10:23:40,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29871 to 29869. [2020-12-22 10:23:40,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29869 states. [2020-12-22 10:23:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29869 states to 29869 states and 41918 transitions. [2020-12-22 10:23:40,421 INFO L78 Accepts]: Start accepts. Automaton has 29869 states and 41918 transitions. Word has length 108 [2020-12-22 10:23:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:40,421 INFO L481 AbstractCegarLoop]: Abstraction has 29869 states and 41918 transitions. [2020-12-22 10:23:40,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 29869 states and 41918 transitions. [2020-12-22 10:23:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:40,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:40,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:40,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:23:40,424 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:23:40,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:40,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364530064] [2020-12-22 10:23:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:40,514 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 10:23:40,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364530064] [2020-12-22 10:23:40,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:40,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:40,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966595805] [2020-12-22 10:23:40,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:40,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:40,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:40,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:40,517 INFO L87 Difference]: Start difference. First operand 29869 states and 41918 transitions. Second operand 3 states. [2020-12-22 10:23:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:42,482 INFO L93 Difference]: Finished difference Result 67633 states and 98112 transitions. [2020-12-22 10:23:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:42,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:42,542 INFO L225 Difference]: With dead ends: 67633 [2020-12-22 10:23:42,543 INFO L226 Difference]: Without dead ends: 47599 [2020-12-22 10:23:42,569 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 10:23:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47599 states. [2020-12-22 10:23:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47599 to 47597. [2020-12-22 10:23:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47597 states. [2020-12-22 10:23:45,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47597 states to 47597 states and 67710 transitions. [2020-12-22 10:23:45,247 INFO L78 Accepts]: Start accepts. Automaton has 47597 states and 67710 transitions. Word has length 108 [2020-12-22 10:23:45,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:45,247 INFO L481 AbstractCegarLoop]: Abstraction has 47597 states and 67710 transitions. [2020-12-22 10:23:45,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:45,248 INFO L276 IsEmpty]: Start isEmpty. Operand 47597 states and 67710 transitions. [2020-12-22 10:23:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:23:45,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:45,257 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 10:23:45,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:23:45,258 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:45,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:23:45,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:45,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699781208] [2020-12-22 10:23:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:45,428 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 10:23:45,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699781208] [2020-12-22 10:23:45,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:45,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:23:45,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526211479] [2020-12-22 10:23:45,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:23:45,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:45,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:23:45,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:23:45,430 INFO L87 Difference]: Start difference. First operand 47597 states and 67710 transitions. Second operand 8 states. [2020-12-22 10:23:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:49,894 INFO L93 Difference]: Finished difference Result 79764 states and 114287 transitions. [2020-12-22 10:23:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:49,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:23:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:49,990 INFO L225 Difference]: With dead ends: 79764 [2020-12-22 10:23:49,990 INFO L226 Difference]: Without dead ends: 79762 [2020-12-22 10:23:50,008 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 10:23:50,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79762 states. [2020-12-22 10:23:53,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79762 to 49133. [2020-12-22 10:23:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49133 states. [2020-12-22 10:23:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49133 states to 49133 states and 69118 transitions. [2020-12-22 10:23:53,379 INFO L78 Accepts]: Start accepts. Automaton has 49133 states and 69118 transitions. Word has length 109 [2020-12-22 10:23:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:53,380 INFO L481 AbstractCegarLoop]: Abstraction has 49133 states and 69118 transitions. [2020-12-22 10:23:53,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:23:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 49133 states and 69118 transitions. [2020-12-22 10:23:53,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:23:53,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:53,405 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, 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 10:23:53,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:23:53,405 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:53,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:53,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:23:53,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:53,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211748222] [2020-12-22 10:23:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:53,673 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 10:23:53,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211748222] [2020-12-22 10:23:53,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:53,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:53,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138437499] [2020-12-22 10:23:53,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:53,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:53,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:53,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:53,680 INFO L87 Difference]: Start difference. First operand 49133 states and 69118 transitions. Second operand 10 states. [2020-12-22 10:24:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:14,240 INFO L93 Difference]: Finished difference Result 371071 states and 537415 transitions. [2020-12-22 10:24:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:14,241 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:24:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:14,778 INFO L225 Difference]: With dead ends: 371071 [2020-12-22 10:24:14,778 INFO L226 Difference]: Without dead ends: 331773 [2020-12-22 10:24:14,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:24:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331773 states. [2020-12-22 10:24:22,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331773 to 88429. [2020-12-22 10:24:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88429 states. [2020-12-22 10:24:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88429 states to 88429 states and 125950 transitions. [2020-12-22 10:24:22,905 INFO L78 Accepts]: Start accepts. Automaton has 88429 states and 125950 transitions. Word has length 149 [2020-12-22 10:24:22,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:22,906 INFO L481 AbstractCegarLoop]: Abstraction has 88429 states and 125950 transitions. [2020-12-22 10:24:22,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 88429 states and 125950 transitions. [2020-12-22 10:24:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:24:22,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:22,939 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 10:24:22,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:24:22,940 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:22,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:22,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:24:22,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:22,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563534372] [2020-12-22 10:24:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:23,191 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 10:24:23,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563534372] [2020-12-22 10:24:23,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:23,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:23,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519030674] [2020-12-22 10:24:23,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:23,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:23,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:23,197 INFO L87 Difference]: Start difference. First operand 88429 states and 125950 transitions. Second operand 10 states. [2020-12-22 10:24:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:48,447 INFO L93 Difference]: Finished difference Result 410367 states and 594247 transitions. [2020-12-22 10:24:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:48,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:24:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:49,265 INFO L225 Difference]: With dead ends: 410367 [2020-12-22 10:24:49,265 INFO L226 Difference]: Without dead ends: 371069 [2020-12-22 10:24:49,400 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 10:24:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371069 states. [2020-12-22 10:25:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371069 to 147437. [2020-12-22 10:25:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147437 states. [2020-12-22 10:25:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147437 states to 147437 states and 210878 transitions. [2020-12-22 10:25:02,602 INFO L78 Accepts]: Start accepts. Automaton has 147437 states and 210878 transitions. Word has length 149 [2020-12-22 10:25:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:02,602 INFO L481 AbstractCegarLoop]: Abstraction has 147437 states and 210878 transitions. [2020-12-22 10:25:02,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:25:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 147437 states and 210878 transitions. [2020-12-22 10:25:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:25:02,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:02,637 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 10:25:02,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:25:02,637 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:02,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:25:02,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:02,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539947195] [2020-12-22 10:25:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:03,185 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 10:25:03,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539947195] [2020-12-22 10:25:03,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:03,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:03,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180208639] [2020-12-22 10:25:03,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:03,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:03,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:03,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:03,190 INFO L87 Difference]: Start difference. First operand 147437 states and 210878 transitions. Second operand 10 states. [2020-12-22 10:25:33,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:33,361 INFO L93 Difference]: Finished difference Result 449663 states and 651079 transitions. [2020-12-22 10:25:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:33,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:25:33,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:34,266 INFO L225 Difference]: With dead ends: 449663 [2020-12-22 10:25:34,267 INFO L226 Difference]: Without dead ends: 410365 [2020-12-22 10:25:34,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:25:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410365 states. [2020-12-22 10:25:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410365 to 186733. [2020-12-22 10:25:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186733 states. [2020-12-22 10:25:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186733 states to 186733 states and 267710 transitions. [2020-12-22 10:25:51,857 INFO L78 Accepts]: Start accepts. Automaton has 186733 states and 267710 transitions. Word has length 149 [2020-12-22 10:25:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:51,858 INFO L481 AbstractCegarLoop]: Abstraction has 186733 states and 267710 transitions. [2020-12-22 10:25:51,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:25:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 186733 states and 267710 transitions. [2020-12-22 10:25:51,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:25:51,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:51,883 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 10:25:51,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:25:51,883 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:51,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:51,885 INFO L82 PathProgramCache]: Analyzing trace with hash -928927789, now seen corresponding path program 1 times [2020-12-22 10:25:51,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:51,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464187636] [2020-12-22 10:25:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:25:52,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464187636] [2020-12-22 10:25:52,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:52,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:52,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110576331] [2020-12-22 10:25:52,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:52,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:52,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:52,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:52,120 INFO L87 Difference]: Start difference. First operand 186733 states and 267710 transitions. Second operand 10 states.