/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.6.ufo.BOUNDED-12.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:04:13,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:04:13,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:04:13,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:04:13,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:04:13,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:04:13,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:04:13,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:04:13,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:04:13,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:04:13,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:04:13,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:04:13,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:04:13,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:04:13,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:04:13,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:04:13,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:04:13,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:04:13,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:04:13,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:04:13,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:04:13,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:04:13,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:04:13,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:04:13,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:04:13,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:04:13,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:04:13,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:04:13,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:04:13,861 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:04:13,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:04:13,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:04:13,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:04:13,864 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:04:13,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:04:13,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:04:13,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:04:13,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:04:13,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:04:13,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:04:13,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:04:13,866 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:04:13,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:04:13,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:04:13,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:04:13,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:04:13,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:04:13,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:04:13,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:04:13,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:04:13,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:04:13,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:04:13,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:04:13,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:04:13,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:04:14,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:04:14,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:04:14,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:04:14,265 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:04:14,266 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:04:14,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label05.c [2020-12-22 10:04:14,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c0752d58/fd8508ca2f774997a17129dfb7fb00a6/FLAG7887e0ad9 [2020-12-22 10:04:15,276 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:04:15,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label05.c [2020-12-22 10:04:15,322 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c0752d58/fd8508ca2f774997a17129dfb7fb00a6/FLAG7887e0ad9 [2020-12-22 10:04:15,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c0752d58/fd8508ca2f774997a17129dfb7fb00a6 [2020-12-22 10:04:15,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:04:15,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:04:15,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:04:15,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:04:15,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:04:15,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:04:15" (1/1) ... [2020-12-22 10:04:15,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6167afa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:15, skipping insertion in model container [2020-12-22 10:04:15,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:04:15" (1/1) ... [2020-12-22 10:04:15,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:04:15,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:04:16,544 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.6.ufo.BOUNDED-12.pals+Problem12_label05.c[15586,15599] [2020-12-22 10:04:16,651 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.6.ufo.BOUNDED-12.pals+Problem12_label05.c[22279,22292] [2020-12-22 10:04:17,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:04:17,671 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:04:17,754 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.6.ufo.BOUNDED-12.pals+Problem12_label05.c[15586,15599] [2020-12-22 10:04:17,772 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.6.ufo.BOUNDED-12.pals+Problem12_label05.c[22279,22292] [2020-12-22 10:04:18,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:04:18,406 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:04:18,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:18 WrapperNode [2020-12-22 10:04:18,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:04:18,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:04:18,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:04:18,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:04:18,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:18" (1/1) ... [2020-12-22 10:04:18,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:18" (1/1) ... [2020-12-22 10:04:18,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:04:18,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:04:18,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:04:18,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:04:19,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:18" (1/1) ... [2020-12-22 10:04:19,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:18" (1/1) ... [2020-12-22 10:04:19,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:18" (1/1) ... [2020-12-22 10:04:19,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:18" (1/1) ... [2020-12-22 10:04:19,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:18" (1/1) ... [2020-12-22 10:04:19,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:18" (1/1) ... [2020-12-22 10:04:19,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:18" (1/1) ... [2020-12-22 10:04:19,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:04:19,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:04:19,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:04:19,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:04:19,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:18" (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 10:04:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:04:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:04:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:04:19,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:04:25,796 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:04:25,797 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:04:25,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:04:25 BoogieIcfgContainer [2020-12-22 10:04:25,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:04:25,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:04:25,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:04:25,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:04:25,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:04:15" (1/3) ... [2020-12-22 10:04:25,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db3170e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:04:25, skipping insertion in model container [2020-12-22 10:04:25,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:18" (2/3) ... [2020-12-22 10:04:25,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db3170e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:04:25, skipping insertion in model container [2020-12-22 10:04:25,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:04:25" (3/3) ... [2020-12-22 10:04:25,817 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label05.c [2020-12-22 10:04:25,825 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:04:25,831 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:04:25,854 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:04:25,903 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:04:25,903 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:04:25,907 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:04:25,907 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:04:25,908 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:04:25,908 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:04:25,908 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:04:25,908 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:04:25,950 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2020-12-22 10:04:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:04:25,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:25,961 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] [2020-12-22 10:04:25,961 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:25,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2020-12-22 10:04:25,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:25,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51870105] [2020-12-22 10:04:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:26,223 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 10:04:26,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51870105] [2020-12-22 10:04:26,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:26,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:04:26,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095048743] [2020-12-22 10:04:26,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:04:26,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:26,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:04:26,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:04:26,254 INFO L87 Difference]: Start difference. First operand 926 states. Second operand 2 states. [2020-12-22 10:04:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:26,355 INFO L93 Difference]: Finished difference Result 1806 states and 3418 transitions. [2020-12-22 10:04:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:04:26,357 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:04:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:26,388 INFO L225 Difference]: With dead ends: 1806 [2020-12-22 10:04:26,388 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:04:26,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:04:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:04:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:04:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:04:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1620 transitions. [2020-12-22 10:04:26,538 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1620 transitions. Word has length 38 [2020-12-22 10:04:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:26,539 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1620 transitions. [2020-12-22 10:04:26,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:04:26,539 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1620 transitions. [2020-12-22 10:04:26,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:04:26,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:26,542 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] [2020-12-22 10:04:26,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:04:26,543 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:26,546 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:04:26,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:26,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083178289] [2020-12-22 10:04:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:26,769 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 10:04:26,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083178289] [2020-12-22 10:04:26,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:26,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:04:26,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249225136] [2020-12-22 10:04:26,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:04:26,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:26,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:04:26,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:04:26,775 INFO L87 Difference]: Start difference. First operand 860 states and 1620 transitions. Second operand 5 states. [2020-12-22 10:04:27,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:27,000 INFO L93 Difference]: Finished difference Result 924 states and 1719 transitions. [2020-12-22 10:04:27,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:04:27,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:04:27,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:27,008 INFO L225 Difference]: With dead ends: 924 [2020-12-22 10:04:27,008 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:04:27,010 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 10:04:27,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:04:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:04:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:04:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1580 transitions. [2020-12-22 10:04:27,047 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1580 transitions. Word has length 38 [2020-12-22 10:04:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:27,047 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1580 transitions. [2020-12-22 10:04:27,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:04:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1580 transitions. [2020-12-22 10:04:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 10:04:27,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:27,058 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] [2020-12-22 10:04:27,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:04:27,059 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash -117834811, now seen corresponding path program 1 times [2020-12-22 10:04:27,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:27,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604244468] [2020-12-22 10:04:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:27,378 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 10:04:27,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604244468] [2020-12-22 10:04:27,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:27,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:27,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125938934] [2020-12-22 10:04:27,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:04:27,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:27,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:04:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:04:27,389 INFO L87 Difference]: Start difference. First operand 860 states and 1580 transitions. Second operand 4 states. [2020-12-22 10:04:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:39,051 INFO L93 Difference]: Finished difference Result 3115 states and 5889 transitions. [2020-12-22 10:04:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:04:39,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 10:04:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:39,065 INFO L225 Difference]: With dead ends: 3115 [2020-12-22 10:04:39,066 INFO L226 Difference]: Without dead ends: 2362 [2020-12-22 10:04:39,068 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 10:04:39,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2020-12-22 10:04:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2362. [2020-12-22 10:04:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2362 states. [2020-12-22 10:04:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3556 transitions. [2020-12-22 10:04:39,132 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3556 transitions. Word has length 60 [2020-12-22 10:04:39,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:39,133 INFO L481 AbstractCegarLoop]: Abstraction has 2362 states and 3556 transitions. [2020-12-22 10:04:39,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:04:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3556 transitions. [2020-12-22 10:04:39,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:04:39,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:39,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:39,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:04:39,135 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:39,136 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:04:39,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:39,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912775364] [2020-12-22 10:04:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:39,227 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 10:04:39,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912775364] [2020-12-22 10:04:39,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:39,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:39,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566882375] [2020-12-22 10:04:39,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:39,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:39,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:39,230 INFO L87 Difference]: Start difference. First operand 2362 states and 3556 transitions. Second operand 3 states. [2020-12-22 10:04:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:39,278 INFO L93 Difference]: Finished difference Result 2476 states and 3736 transitions. [2020-12-22 10:04:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:39,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:04:39,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:39,292 INFO L225 Difference]: With dead ends: 2476 [2020-12-22 10:04:39,293 INFO L226 Difference]: Without dead ends: 2416 [2020-12-22 10:04:39,294 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 10:04:39,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2020-12-22 10:04:39,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2414. [2020-12-22 10:04:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2414 states. [2020-12-22 10:04:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3639 transitions. [2020-12-22 10:04:39,356 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3639 transitions. Word has length 77 [2020-12-22 10:04:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:39,357 INFO L481 AbstractCegarLoop]: Abstraction has 2414 states and 3639 transitions. [2020-12-22 10:04:39,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3639 transitions. [2020-12-22 10:04:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:04:39,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:39,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:39,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:04:39,359 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:39,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:04:39,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:39,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093642313] [2020-12-22 10:04:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:39,442 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 10:04:39,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093642313] [2020-12-22 10:04:39,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:39,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:39,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921137741] [2020-12-22 10:04:39,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:39,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:39,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:39,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:39,445 INFO L87 Difference]: Start difference. First operand 2414 states and 3639 transitions. Second operand 3 states. [2020-12-22 10:04:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:39,497 INFO L93 Difference]: Finished difference Result 2626 states and 3975 transitions. [2020-12-22 10:04:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:39,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:04:39,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:39,511 INFO L225 Difference]: With dead ends: 2626 [2020-12-22 10:04:39,511 INFO L226 Difference]: Without dead ends: 2514 [2020-12-22 10:04:39,513 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 10:04:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2020-12-22 10:04:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2512. [2020-12-22 10:04:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2512 states. [2020-12-22 10:04:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 3794 transitions. [2020-12-22 10:04:39,578 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 3794 transitions. Word has length 77 [2020-12-22 10:04:39,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:39,578 INFO L481 AbstractCegarLoop]: Abstraction has 2512 states and 3794 transitions. [2020-12-22 10:04:39,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 3794 transitions. [2020-12-22 10:04:39,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:04:39,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:39,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:39,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:04:39,580 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:39,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:04:39,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:39,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021213467] [2020-12-22 10:04:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:39,712 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 10:04:39,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021213467] [2020-12-22 10:04:39,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:39,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:39,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694429983] [2020-12-22 10:04:39,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:39,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:39,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:39,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:39,715 INFO L87 Difference]: Start difference. First operand 2512 states and 3794 transitions. Second operand 8 states. [2020-12-22 10:04:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:40,171 INFO L93 Difference]: Finished difference Result 5032 states and 7790 transitions. [2020-12-22 10:04:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:04:40,172 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:04:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:40,201 INFO L225 Difference]: With dead ends: 5032 [2020-12-22 10:04:40,201 INFO L226 Difference]: Without dead ends: 4822 [2020-12-22 10:04:40,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:04:40,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4822 states. [2020-12-22 10:04:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4822 to 2720. [2020-12-22 10:04:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2720 states. [2020-12-22 10:04:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 4118 transitions. [2020-12-22 10:04:40,310 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 4118 transitions. Word has length 77 [2020-12-22 10:04:40,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:40,311 INFO L481 AbstractCegarLoop]: Abstraction has 2720 states and 4118 transitions. [2020-12-22 10:04:40,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:40,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 4118 transitions. [2020-12-22 10:04:40,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:40,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:40,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:40,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:04:40,314 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:40,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:40,318 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:04:40,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:40,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218795098] [2020-12-22 10:04:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:40,444 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 10:04:40,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218795098] [2020-12-22 10:04:40,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:40,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:40,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846995407] [2020-12-22 10:04:40,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:40,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:40,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:40,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:40,447 INFO L87 Difference]: Start difference. First operand 2720 states and 4118 transitions. Second operand 3 states. [2020-12-22 10:04:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:40,524 INFO L93 Difference]: Finished difference Result 3340 states and 5090 transitions. [2020-12-22 10:04:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:40,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:40,540 INFO L225 Difference]: With dead ends: 3340 [2020-12-22 10:04:40,540 INFO L226 Difference]: Without dead ends: 2922 [2020-12-22 10:04:40,544 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 10:04:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2020-12-22 10:04:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2020-12-22 10:04:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2920 states. [2020-12-22 10:04:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4426 transitions. [2020-12-22 10:04:40,643 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4426 transitions. Word has length 79 [2020-12-22 10:04:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:40,643 INFO L481 AbstractCegarLoop]: Abstraction has 2920 states and 4426 transitions. [2020-12-22 10:04:40,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:40,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4426 transitions. [2020-12-22 10:04:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:40,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:40,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:40,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:04:40,651 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:40,652 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:04:40,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:40,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446845427] [2020-12-22 10:04:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:41,040 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 10:04:41,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446845427] [2020-12-22 10:04:41,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:41,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:41,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063179843] [2020-12-22 10:04:41,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:41,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:41,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:41,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:41,043 INFO L87 Difference]: Start difference. First operand 2920 states and 4426 transitions. Second operand 8 states. [2020-12-22 10:04:41,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:41,432 INFO L93 Difference]: Finished difference Result 3538 states and 5390 transitions. [2020-12-22 10:04:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:41,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:04:41,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:41,450 INFO L225 Difference]: With dead ends: 3538 [2020-12-22 10:04:41,450 INFO L226 Difference]: Without dead ends: 2922 [2020-12-22 10:04:41,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:04:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2020-12-22 10:04:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2020-12-22 10:04:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2920 states. [2020-12-22 10:04:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4420 transitions. [2020-12-22 10:04:41,552 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4420 transitions. Word has length 79 [2020-12-22 10:04:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:41,552 INFO L481 AbstractCegarLoop]: Abstraction has 2920 states and 4420 transitions. [2020-12-22 10:04:41,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:41,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4420 transitions. [2020-12-22 10:04:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:41,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:41,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:41,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:04:41,554 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:41,555 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:04:41,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:41,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924445625] [2020-12-22 10:04:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:41,621 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 10:04:41,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924445625] [2020-12-22 10:04:41,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:41,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:41,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421102259] [2020-12-22 10:04:41,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:41,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:41,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:41,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:41,624 INFO L87 Difference]: Start difference. First operand 2920 states and 4420 transitions. Second operand 3 states. [2020-12-22 10:04:41,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:41,726 INFO L93 Difference]: Finished difference Result 4080 states and 6214 transitions. [2020-12-22 10:04:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:41,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:41,744 INFO L225 Difference]: With dead ends: 4080 [2020-12-22 10:04:41,745 INFO L226 Difference]: Without dead ends: 3464 [2020-12-22 10:04:41,747 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 10:04:41,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2020-12-22 10:04:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3462. [2020-12-22 10:04:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3462 states. [2020-12-22 10:04:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 5244 transitions. [2020-12-22 10:04:41,886 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 5244 transitions. Word has length 79 [2020-12-22 10:04:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:41,887 INFO L481 AbstractCegarLoop]: Abstraction has 3462 states and 5244 transitions. [2020-12-22 10:04:41,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 5244 transitions. [2020-12-22 10:04:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:41,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:41,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:41,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:04:41,889 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:41,889 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:04:41,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:41,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914235805] [2020-12-22 10:04:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:41,950 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 10:04:41,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914235805] [2020-12-22 10:04:41,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:41,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:41,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4683226] [2020-12-22 10:04:41,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:41,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:41,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:41,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:41,957 INFO L87 Difference]: Start difference. First operand 3462 states and 5244 transitions. Second operand 3 states. [2020-12-22 10:04:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:42,129 INFO L93 Difference]: Finished difference Result 5634 states and 8566 transitions. [2020-12-22 10:04:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:42,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:42,165 INFO L225 Difference]: With dead ends: 5634 [2020-12-22 10:04:42,165 INFO L226 Difference]: Without dead ends: 4476 [2020-12-22 10:04:42,169 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 10:04:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2020-12-22 10:04:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 4474. [2020-12-22 10:04:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4474 states. [2020-12-22 10:04:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 6760 transitions. [2020-12-22 10:04:42,404 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 6760 transitions. Word has length 79 [2020-12-22 10:04:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:42,405 INFO L481 AbstractCegarLoop]: Abstraction has 4474 states and 6760 transitions. [2020-12-22 10:04:42,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:42,405 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 6760 transitions. [2020-12-22 10:04:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:42,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:42,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:42,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:04:42,406 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:42,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:04:42,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:42,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494467129] [2020-12-22 10:04:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:42,465 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 10:04:42,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494467129] [2020-12-22 10:04:42,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:42,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:42,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579664186] [2020-12-22 10:04:42,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:42,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:42,468 INFO L87 Difference]: Start difference. First operand 4474 states and 6760 transitions. Second operand 3 states. [2020-12-22 10:04:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:42,764 INFO L93 Difference]: Finished difference Result 8526 states and 12874 transitions. [2020-12-22 10:04:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:42,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:42,782 INFO L225 Difference]: With dead ends: 8526 [2020-12-22 10:04:42,782 INFO L226 Difference]: Without dead ends: 6356 [2020-12-22 10:04:42,788 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 10:04:42,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6356 states. [2020-12-22 10:04:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6356 to 6354. [2020-12-22 10:04:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6354 states. [2020-12-22 10:04:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 9528 transitions. [2020-12-22 10:04:43,259 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 9528 transitions. Word has length 79 [2020-12-22 10:04:43,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:43,260 INFO L481 AbstractCegarLoop]: Abstraction has 6354 states and 9528 transitions. [2020-12-22 10:04:43,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 9528 transitions. [2020-12-22 10:04:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:43,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:43,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:43,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:04:43,262 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:43,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:43,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:04:43,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:43,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386626850] [2020-12-22 10:04:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:43,334 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 10:04:43,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386626850] [2020-12-22 10:04:43,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:43,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:43,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138247432] [2020-12-22 10:04:43,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:43,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:43,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:43,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:43,337 INFO L87 Difference]: Start difference. First operand 6354 states and 9528 transitions. Second operand 3 states. [2020-12-22 10:04:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:43,917 INFO L93 Difference]: Finished difference Result 13878 states and 20698 transitions. [2020-12-22 10:04:43,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:43,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:43,941 INFO L225 Difference]: With dead ends: 13878 [2020-12-22 10:04:43,942 INFO L226 Difference]: Without dead ends: 9828 [2020-12-22 10:04:43,951 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 10:04:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9828 states. [2020-12-22 10:04:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9828 to 9826. [2020-12-22 10:04:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9826 states. [2020-12-22 10:04:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9826 states to 9826 states and 14536 transitions. [2020-12-22 10:04:44,560 INFO L78 Accepts]: Start accepts. Automaton has 9826 states and 14536 transitions. Word has length 79 [2020-12-22 10:04:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:44,561 INFO L481 AbstractCegarLoop]: Abstraction has 9826 states and 14536 transitions. [2020-12-22 10:04:44,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 9826 states and 14536 transitions. [2020-12-22 10:04:44,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:04:44,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:44,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:44,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:04:44,563 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:44,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:44,563 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:04:44,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:44,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394677717] [2020-12-22 10:04:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:44,716 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 10:04:44,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394677717] [2020-12-22 10:04:44,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:44,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:44,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652871210] [2020-12-22 10:04:44,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:44,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:44,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:44,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:44,719 INFO L87 Difference]: Start difference. First operand 9826 states and 14536 transitions. Second operand 8 states. [2020-12-22 10:04:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:45,921 INFO L93 Difference]: Finished difference Result 16289 states and 23807 transitions. [2020-12-22 10:04:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:04:45,922 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:04:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:45,959 INFO L225 Difference]: With dead ends: 16289 [2020-12-22 10:04:45,959 INFO L226 Difference]: Without dead ends: 16287 [2020-12-22 10:04:45,966 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 10:04:45,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16287 states. [2020-12-22 10:04:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16287 to 10210. [2020-12-22 10:04:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10210 states. [2020-12-22 10:04:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 14888 transitions. [2020-12-22 10:04:46,721 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 14888 transitions. Word has length 80 [2020-12-22 10:04:46,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:46,721 INFO L481 AbstractCegarLoop]: Abstraction has 10210 states and 14888 transitions. [2020-12-22 10:04:46,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 14888 transitions. [2020-12-22 10:04:46,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:46,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:46,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:46,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:04:46,729 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:46,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:46,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2020-12-22 10:04:46,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:46,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353302015] [2020-12-22 10:04:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:04:47,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353302015] [2020-12-22 10:04:47,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:47,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:47,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481175493] [2020-12-22 10:04:47,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:47,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:47,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:47,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:47,006 INFO L87 Difference]: Start difference. First operand 10210 states and 14888 transitions. Second operand 8 states. [2020-12-22 10:04:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:49,895 INFO L93 Difference]: Finished difference Result 59216 states and 85599 transitions. [2020-12-22 10:04:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:49,896 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:50,012 INFO L225 Difference]: With dead ends: 59216 [2020-12-22 10:04:50,013 INFO L226 Difference]: Without dead ends: 51310 [2020-12-22 10:04:50,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51310 states. [2020-12-22 10:04:51,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51310 to 18114. [2020-12-22 10:04:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18114 states. [2020-12-22 10:04:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18114 states to 18114 states and 26216 transitions. [2020-12-22 10:04:51,511 INFO L78 Accepts]: Start accepts. Automaton has 18114 states and 26216 transitions. Word has length 112 [2020-12-22 10:04:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:51,512 INFO L481 AbstractCegarLoop]: Abstraction has 18114 states and 26216 transitions. [2020-12-22 10:04:51,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:51,512 INFO L276 IsEmpty]: Start isEmpty. Operand 18114 states and 26216 transitions. [2020-12-22 10:04:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:51,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:51,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:51,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:04:51,521 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:51,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:51,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2020-12-22 10:04:51,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:51,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029443435] [2020-12-22 10:04:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:04:51,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029443435] [2020-12-22 10:04:51,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:51,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:51,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497154508] [2020-12-22 10:04:51,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:51,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:51,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:51,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:51,684 INFO L87 Difference]: Start difference. First operand 18114 states and 26216 transitions. Second operand 8 states. [2020-12-22 10:04:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:54,984 INFO L93 Difference]: Finished difference Result 67120 states and 96927 transitions. [2020-12-22 10:04:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:54,986 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:55,127 INFO L225 Difference]: With dead ends: 67120 [2020-12-22 10:04:55,127 INFO L226 Difference]: Without dead ends: 59214 [2020-12-22 10:04:55,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:55,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59214 states. [2020-12-22 10:04:56,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59214 to 29986. [2020-12-22 10:04:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29986 states. [2020-12-22 10:04:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29986 states to 29986 states and 43128 transitions. [2020-12-22 10:04:57,151 INFO L78 Accepts]: Start accepts. Automaton has 29986 states and 43128 transitions. Word has length 112 [2020-12-22 10:04:57,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:57,155 INFO L481 AbstractCegarLoop]: Abstraction has 29986 states and 43128 transitions. [2020-12-22 10:04:57,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 29986 states and 43128 transitions. [2020-12-22 10:04:57,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:57,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:57,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:57,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:04:57,170 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:57,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:57,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2020-12-22 10:04:57,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:57,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879201614] [2020-12-22 10:04:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:04:57,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879201614] [2020-12-22 10:04:57,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:57,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:57,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055827103] [2020-12-22 10:04:57,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:57,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:57,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:57,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:57,340 INFO L87 Difference]: Start difference. First operand 29986 states and 43128 transitions. Second operand 8 states. [2020-12-22 10:05:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:01,126 INFO L93 Difference]: Finished difference Result 75024 states and 108255 transitions. [2020-12-22 10:05:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:01,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:01,249 INFO L225 Difference]: With dead ends: 75024 [2020-12-22 10:05:01,249 INFO L226 Difference]: Without dead ends: 67118 [2020-12-22 10:05:01,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:01,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67118 states. [2020-12-22 10:05:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67118 to 37890. [2020-12-22 10:05:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37890 states. [2020-12-22 10:05:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37890 states to 37890 states and 54456 transitions. [2020-12-22 10:05:04,578 INFO L78 Accepts]: Start accepts. Automaton has 37890 states and 54456 transitions. Word has length 112 [2020-12-22 10:05:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:04,578 INFO L481 AbstractCegarLoop]: Abstraction has 37890 states and 54456 transitions. [2020-12-22 10:05:04,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 37890 states and 54456 transitions. [2020-12-22 10:05:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:04,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:04,589 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:04,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:05:04,589 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:04,590 INFO L82 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2020-12-22 10:05:04,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:04,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021805983] [2020-12-22 10:05:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:05:04,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021805983] [2020-12-22 10:05:04,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:04,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:04,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549889473] [2020-12-22 10:05:04,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:04,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:04,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:04,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:04,749 INFO L87 Difference]: Start difference. First operand 37890 states and 54456 transitions. Second operand 8 states. [2020-12-22 10:05:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:09,427 INFO L93 Difference]: Finished difference Result 82928 states and 119583 transitions. [2020-12-22 10:05:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:09,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:09,518 INFO L225 Difference]: With dead ends: 82928 [2020-12-22 10:05:09,519 INFO L226 Difference]: Without dead ends: 75022 [2020-12-22 10:05:09,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75022 states. [2020-12-22 10:05:13,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75022 to 45794. [2020-12-22 10:05:13,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45794 states. [2020-12-22 10:05:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45794 states to 45794 states and 65784 transitions. [2020-12-22 10:05:13,215 INFO L78 Accepts]: Start accepts. Automaton has 45794 states and 65784 transitions. Word has length 112 [2020-12-22 10:05:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:13,216 INFO L481 AbstractCegarLoop]: Abstraction has 45794 states and 65784 transitions. [2020-12-22 10:05:13,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 45794 states and 65784 transitions. [2020-12-22 10:05:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:13,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:13,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:13,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:05:13,227 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2020-12-22 10:05:13,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:13,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639758603] [2020-12-22 10:05:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:05:13,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639758603] [2020-12-22 10:05:13,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:13,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:13,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378805753] [2020-12-22 10:05:13,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:13,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:13,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:13,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:13,376 INFO L87 Difference]: Start difference. First operand 45794 states and 65784 transitions. Second operand 8 states. [2020-12-22 10:05:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:19,608 INFO L93 Difference]: Finished difference Result 90832 states and 130911 transitions. [2020-12-22 10:05:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:19,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:19,701 INFO L225 Difference]: With dead ends: 90832 [2020-12-22 10:05:19,702 INFO L226 Difference]: Without dead ends: 82926 [2020-12-22 10:05:19,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82926 states. [2020-12-22 10:05:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82926 to 53698. [2020-12-22 10:05:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53698 states. [2020-12-22 10:05:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53698 states to 53698 states and 77112 transitions. [2020-12-22 10:05:23,940 INFO L78 Accepts]: Start accepts. Automaton has 53698 states and 77112 transitions. Word has length 112 [2020-12-22 10:05:23,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:23,940 INFO L481 AbstractCegarLoop]: Abstraction has 53698 states and 77112 transitions. [2020-12-22 10:05:23,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 53698 states and 77112 transitions. [2020-12-22 10:05:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:23,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:23,954 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:23,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:05:23,955 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:23,955 INFO L82 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2020-12-22 10:05:23,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:23,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805477327] [2020-12-22 10:05:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:05:24,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805477327] [2020-12-22 10:05:24,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:24,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:24,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110591803] [2020-12-22 10:05:24,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:24,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:24,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:24,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:24,120 INFO L87 Difference]: Start difference. First operand 53698 states and 77112 transitions. Second operand 8 states. [2020-12-22 10:05:30,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:30,672 INFO L93 Difference]: Finished difference Result 93936 states and 135391 transitions. [2020-12-22 10:05:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:30,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:30,753 INFO L225 Difference]: With dead ends: 93936 [2020-12-22 10:05:30,753 INFO L226 Difference]: Without dead ends: 88430 [2020-12-22 10:05:30,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88430 states. [2020-12-22 10:05:35,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88430 to 59202. [2020-12-22 10:05:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59202 states. [2020-12-22 10:05:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59202 states to 59202 states and 85048 transitions. [2020-12-22 10:05:35,663 INFO L78 Accepts]: Start accepts. Automaton has 59202 states and 85048 transitions. Word has length 112 [2020-12-22 10:05:35,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:35,663 INFO L481 AbstractCegarLoop]: Abstraction has 59202 states and 85048 transitions. [2020-12-22 10:05:35,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 59202 states and 85048 transitions. [2020-12-22 10:05:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:05:35,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:35,675 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:35,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:05:35,675 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2020-12-22 10:05:35,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:35,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408434851] [2020-12-22 10:05:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:35,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408434851] [2020-12-22 10:05:35,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:35,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:35,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188663109] [2020-12-22 10:05:35,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:35,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:35,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:35,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:35,757 INFO L87 Difference]: Start difference. First operand 59202 states and 85048 transitions. Second operand 3 states. [2020-12-22 10:05:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:40,251 INFO L93 Difference]: Finished difference Result 116102 states and 166634 transitions. [2020-12-22 10:05:40,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:40,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:05:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:40,308 INFO L225 Difference]: With dead ends: 116102 [2020-12-22 10:05:40,308 INFO L226 Difference]: Without dead ends: 59204 [2020-12-22 10:05:40,446 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 10:05:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59204 states. [2020-12-22 10:05:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59204 to 59202. [2020-12-22 10:05:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59202 states. [2020-12-22 10:05:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59202 states to 59202 states and 84360 transitions. [2020-12-22 10:05:45,065 INFO L78 Accepts]: Start accepts. Automaton has 59202 states and 84360 transitions. Word has length 113 [2020-12-22 10:05:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:45,065 INFO L481 AbstractCegarLoop]: Abstraction has 59202 states and 84360 transitions. [2020-12-22 10:05:45,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:45,066 INFO L276 IsEmpty]: Start isEmpty. Operand 59202 states and 84360 transitions. [2020-12-22 10:05:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:05:45,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:45,071 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:45,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:05:45,071 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:45,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:45,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2020-12-22 10:05:45,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:45,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493907927] [2020-12-22 10:05:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:45,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493907927] [2020-12-22 10:05:45,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:45,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:45,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413142929] [2020-12-22 10:05:45,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:45,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:45,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:45,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:45,147 INFO L87 Difference]: Start difference. First operand 59202 states and 84360 transitions. Second operand 3 states. [2020-12-22 10:05:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:47,753 INFO L93 Difference]: Finished difference Result 87654 states and 124810 transitions. [2020-12-22 10:05:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:47,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:05:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:47,782 INFO L225 Difference]: With dead ends: 87654 [2020-12-22 10:05:47,782 INFO L226 Difference]: Without dead ends: 30756 [2020-12-22 10:05:47,807 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 10:05:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30756 states. [2020-12-22 10:05:50,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30756 to 30754. [2020-12-22 10:05:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30754 states. [2020-12-22 10:05:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30754 states to 30754 states and 43568 transitions. [2020-12-22 10:05:50,363 INFO L78 Accepts]: Start accepts. Automaton has 30754 states and 43568 transitions. Word has length 113 [2020-12-22 10:05:50,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:50,363 INFO L481 AbstractCegarLoop]: Abstraction has 30754 states and 43568 transitions. [2020-12-22 10:05:50,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:50,363 INFO L276 IsEmpty]: Start isEmpty. Operand 30754 states and 43568 transitions. [2020-12-22 10:05:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:05:50,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:50,366 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:05:50,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:05:50,367 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:50,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1209709145, now seen corresponding path program 1 times [2020-12-22 10:05:50,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:50,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501009696] [2020-12-22 10:05:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:50,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501009696] [2020-12-22 10:05:50,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:50,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:50,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777110868] [2020-12-22 10:05:50,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:50,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:50,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:50,455 INFO L87 Difference]: Start difference. First operand 30754 states and 43568 transitions. Second operand 3 states. [2020-12-22 10:05:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:51,728 INFO L93 Difference]: Finished difference Result 44982 states and 63622 transitions. [2020-12-22 10:05:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:51,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:05:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:51,750 INFO L225 Difference]: With dead ends: 44982 [2020-12-22 10:05:51,750 INFO L226 Difference]: Without dead ends: 16532 [2020-12-22 10:05:51,761 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 10:05:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16532 states. [2020-12-22 10:05:53,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16532 to 16530. [2020-12-22 10:05:53,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16530 states. [2020-12-22 10:05:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16530 states to 16530 states and 23344 transitions. [2020-12-22 10:05:53,031 INFO L78 Accepts]: Start accepts. Automaton has 16530 states and 23344 transitions. Word has length 113 [2020-12-22 10:05:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:53,031 INFO L481 AbstractCegarLoop]: Abstraction has 16530 states and 23344 transitions. [2020-12-22 10:05:53,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:53,031 INFO L276 IsEmpty]: Start isEmpty. Operand 16530 states and 23344 transitions. [2020-12-22 10:05:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:05:53,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:53,034 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:05:53,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:05:53,034 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:53,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1498655857, now seen corresponding path program 1 times [2020-12-22 10:05:53,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:53,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457802257] [2020-12-22 10:05:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:53,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457802257] [2020-12-22 10:05:53,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:53,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:53,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438723044] [2020-12-22 10:05:53,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:53,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:53,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:53,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:53,110 INFO L87 Difference]: Start difference. First operand 16530 states and 23344 transitions. Second operand 3 states. [2020-12-22 10:05:53,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:53,652 INFO L93 Difference]: Finished difference Result 23646 states and 33286 transitions. [2020-12-22 10:05:53,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:53,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:05:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:53,662 INFO L225 Difference]: With dead ends: 23646 [2020-12-22 10:05:53,662 INFO L226 Difference]: Without dead ends: 9420 [2020-12-22 10:05:53,670 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 10:05:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2020-12-22 10:05:54,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9418. [2020-12-22 10:05:54,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9418 states. [2020-12-22 10:05:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9418 states to 9418 states and 13318 transitions. [2020-12-22 10:05:54,323 INFO L78 Accepts]: Start accepts. Automaton has 9418 states and 13318 transitions. Word has length 113 [2020-12-22 10:05:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:54,323 INFO L481 AbstractCegarLoop]: Abstraction has 9418 states and 13318 transitions. [2020-12-22 10:05:54,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 9418 states and 13318 transitions. [2020-12-22 10:05:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:05:54,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:54,325 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:54,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:05:54,326 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:54,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:54,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1585774651, now seen corresponding path program 1 times [2020-12-22 10:05:54,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:54,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426141560] [2020-12-22 10:05:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:54,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426141560] [2020-12-22 10:05:54,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375868697] [2020-12-22 10:05:54,714 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 10:05:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:54,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:05:54,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:05:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:05:55,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:05:55,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:05:55,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368920069] [2020-12-22 10:05:55,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:05:55,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:55,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:05:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:05:55,324 INFO L87 Difference]: Start difference. First operand 9418 states and 13318 transitions. Second operand 21 states. [2020-12-22 10:05:59,175 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:05:59,515 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-22 10:05:59,724 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:06:00,253 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:06:06,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:06,384 INFO L93 Difference]: Finished difference Result 57297 states and 78623 transitions. [2020-12-22 10:06:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 10:06:06,385 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-12-22 10:06:06,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:06,524 INFO L225 Difference]: With dead ends: 57297 [2020-12-22 10:06:06,524 INFO L226 Difference]: Without dead ends: 50183 [2020-12-22 10:06:06,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1672, Invalid=8228, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 10:06:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50183 states. [2020-12-22 10:06:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50183 to 32438. [2020-12-22 10:06:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32438 states. [2020-12-22 10:06:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32438 states to 32438 states and 44486 transitions. [2020-12-22 10:06:09,988 INFO L78 Accepts]: Start accepts. Automaton has 32438 states and 44486 transitions. Word has length 113 [2020-12-22 10:06:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:09,989 INFO L481 AbstractCegarLoop]: Abstraction has 32438 states and 44486 transitions. [2020-12-22 10:06:09,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:06:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 32438 states and 44486 transitions. [2020-12-22 10:06:09,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:06:09,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:09,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:10,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:06:10,210 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:10,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:10,211 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2020-12-22 10:06:10,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:10,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101459848] [2020-12-22 10:06:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:10,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101459848] [2020-12-22 10:06:10,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520632521] [2020-12-22 10:06:10,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:06:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:10,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:06:10,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:06:11,141 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:06:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:11,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:06:11,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:06:11,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819461730] [2020-12-22 10:06:11,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:06:11,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:11,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:06:11,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:06:11,484 INFO L87 Difference]: Start difference. First operand 32438 states and 44486 transitions. Second operand 18 states. [2020-12-22 10:06:11,616 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:06:12,072 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:12,730 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 10:06:13,701 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:06:14,198 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:14,338 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:14,736 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:15,103 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:16,971 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:17,109 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:06:17,556 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:06:17,725 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:06:17,870 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:18,371 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:06:18,514 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:20,378 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:20,787 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:23,207 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:23,605 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:23,790 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:06:24,066 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:06:24,568 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:24,751 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:06:24,893 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:25,025 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:25,208 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:06:25,996 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:06:30,262 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:06:30,405 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:30,598 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:06:30,736 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:31,694 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:07:04,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:04,421 INFO L93 Difference]: Finished difference Result 391208 states and 528070 transitions. [2020-12-22 10:07:04,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 10:07:04,421 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2020-12-22 10:07:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:05,225 INFO L225 Difference]: With dead ends: 391208 [2020-12-22 10:07:05,225 INFO L226 Difference]: Without dead ends: 361074 [2020-12-22 10:07:05,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 10:07:05,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361074 states. [2020-12-22 10:07:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361074 to 138715. [2020-12-22 10:07:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138715 states. [2020-12-22 10:07:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138715 states to 138715 states and 186012 transitions. [2020-12-22 10:07:23,103 INFO L78 Accepts]: Start accepts. Automaton has 138715 states and 186012 transitions. Word has length 114 [2020-12-22 10:07:23,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:23,104 INFO L481 AbstractCegarLoop]: Abstraction has 138715 states and 186012 transitions. [2020-12-22 10:07:23,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:07:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 138715 states and 186012 transitions. [2020-12-22 10:07:23,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:07:23,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:23,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:23,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:07:23,309 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:23,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1061210015, now seen corresponding path program 1 times [2020-12-22 10:07:23,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:23,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550523761] [2020-12-22 10:07:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:23,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550523761] [2020-12-22 10:07:23,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:23,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:23,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235755277] [2020-12-22 10:07:23,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:23,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:23,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:23,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:23,404 INFO L87 Difference]: Start difference. First operand 138715 states and 186012 transitions. Second operand 3 states. [2020-12-22 10:07:29,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:29,856 INFO L93 Difference]: Finished difference Result 190807 states and 255147 transitions. [2020-12-22 10:07:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:29,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 10:07:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:29,937 INFO L225 Difference]: With dead ends: 190807 [2020-12-22 10:07:29,937 INFO L226 Difference]: Without dead ends: 54396 [2020-12-22 10:07:30,040 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 10:07:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54396 states. [2020-12-22 10:07:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54396 to 50920. [2020-12-22 10:07:35,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50920 states. [2020-12-22 10:07:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50920 states to 50920 states and 67594 transitions. [2020-12-22 10:07:35,878 INFO L78 Accepts]: Start accepts. Automaton has 50920 states and 67594 transitions. Word has length 114 [2020-12-22 10:07:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:35,879 INFO L481 AbstractCegarLoop]: Abstraction has 50920 states and 67594 transitions. [2020-12-22 10:07:35,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:35,879 INFO L276 IsEmpty]: Start isEmpty. Operand 50920 states and 67594 transitions. [2020-12-22 10:07:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:07:35,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:35,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:35,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 10:07:35,882 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:35,882 INFO L82 PathProgramCache]: Analyzing trace with hash 707187499, now seen corresponding path program 1 times [2020-12-22 10:07:35,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:35,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615898040] [2020-12-22 10:07:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:07:35,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615898040] [2020-12-22 10:07:35,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:35,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:07:35,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856363925] [2020-12-22 10:07:35,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:07:35,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:07:35,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:07:35,989 INFO L87 Difference]: Start difference. First operand 50920 states and 67594 transitions. Second operand 6 states. [2020-12-22 10:07:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:41,396 INFO L93 Difference]: Finished difference Result 96391 states and 127818 transitions. [2020-12-22 10:07:41,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:07:41,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:07:41,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:41,444 INFO L225 Difference]: With dead ends: 96391 [2020-12-22 10:07:41,445 INFO L226 Difference]: Without dead ends: 47892 [2020-12-22 10:07:41,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:07:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47892 states. [2020-12-22 10:07:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47892 to 47892. [2020-12-22 10:07:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47892 states. [2020-12-22 10:07:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47892 states to 47892 states and 63175 transitions. [2020-12-22 10:07:46,971 INFO L78 Accepts]: Start accepts. Automaton has 47892 states and 63175 transitions. Word has length 114 [2020-12-22 10:07:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:46,972 INFO L481 AbstractCegarLoop]: Abstraction has 47892 states and 63175 transitions. [2020-12-22 10:07:46,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:07:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 47892 states and 63175 transitions. [2020-12-22 10:07:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:07:46,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:46,976 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:46,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:07:46,976 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:46,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:46,976 INFO L82 PathProgramCache]: Analyzing trace with hash 125621387, now seen corresponding path program 1 times [2020-12-22 10:07:46,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:46,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90966267] [2020-12-22 10:07:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 10:07:47,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90966267] [2020-12-22 10:07:47,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:47,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:07:47,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648461271] [2020-12-22 10:07:47,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:07:47,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:07:47,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:07:47,083 INFO L87 Difference]: Start difference. First operand 47892 states and 63175 transitions. Second operand 6 states. [2020-12-22 10:07:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:51,480 INFO L93 Difference]: Finished difference Result 82594 states and 108668 transitions. [2020-12-22 10:07:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:07:51,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:07:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:51,521 INFO L225 Difference]: With dead ends: 82594 [2020-12-22 10:07:51,521 INFO L226 Difference]: Without dead ends: 37203 [2020-12-22 10:07:51,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:07:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37203 states.