/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:25:38,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:25:38,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:25:38,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:25:38,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:25:38,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:25:38,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:25:38,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:25:38,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:25:38,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:25:38,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:25:38,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:25:38,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:25:38,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:25:38,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:25:38,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:25:38,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:25:38,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:25:38,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:25:38,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:25:38,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:25:38,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:25:38,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:25:38,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:25:38,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:25:38,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:25:38,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:25:38,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:25:38,920 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:25:38,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:25:38,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:25:38,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:25:38,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:25:38,955 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:25:38,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:25:38,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:25:38,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:25:38,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:25:38,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:25:38,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:25:38,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:25:38,960 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:25:38,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:25:38,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:25:38,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:25:38,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:25:38,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:25:38,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:25:38,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:25:38,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:25:38,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:25:38,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:25:38,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:25:38,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:25:38,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:25:39,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:25:39,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:25:39,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:25:39,412 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:25:39,413 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:25:39,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label08.c [2020-12-22 10:25:39,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f3f96c1/b2f66259a1bd49aab0a2a2a1034a0ff6/FLAG3f6084afe [2020-12-22 10:25:40,514 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:25:40,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label08.c [2020-12-22 10:25:40,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f3f96c1/b2f66259a1bd49aab0a2a2a1034a0ff6/FLAG3f6084afe [2020-12-22 10:25:40,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f3f96c1/b2f66259a1bd49aab0a2a2a1034a0ff6 [2020-12-22 10:25:40,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:25:40,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:25:40,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:25:40,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:25:40,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:25:40,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:40" (1/1) ... [2020-12-22 10:25:40,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f6014e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:40, skipping insertion in model container [2020-12-22 10:25:40,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:40" (1/1) ... [2020-12-22 10:25:40,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:25:41,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:25:41,688 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label08.c[26875,26888] [2020-12-22 10:25:41,773 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label08.c[30139,30152] [2020-12-22 10:25:42,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:25:42,737 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:25:42,839 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label08.c[26875,26888] [2020-12-22 10:25:42,856 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label08.c[30139,30152] [2020-12-22 10:25:43,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:25:43,674 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:25:43,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43 WrapperNode [2020-12-22 10:25:43,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:25:43,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:25:43,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:25:43,680 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:25:43,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:43,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:25:44,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:25:44,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:25:44,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:25:44,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:45,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:25:45,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:25:45,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:25:45,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:25:45,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (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 10:25:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:25:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:25:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:25:45,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:25:50,998 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:25:50,999 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:25:51,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:25:51 BoogieIcfgContainer [2020-12-22 10:25:51,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:25:51,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:25:51,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:25:51,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:25:51,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:25:40" (1/3) ... [2020-12-22 10:25:51,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77450bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:25:51, skipping insertion in model container [2020-12-22 10:25:51,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (2/3) ... [2020-12-22 10:25:51,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77450bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:25:51, skipping insertion in model container [2020-12-22 10:25:51,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:25:51" (3/3) ... [2020-12-22 10:25:51,012 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label08.c [2020-12-22 10:25:51,019 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:25:51,026 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:25:51,046 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:25:51,082 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:25:51,082 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:25:51,083 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:25:51,083 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:25:51,083 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:25:51,083 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:25:51,083 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:25:51,084 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:25:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states. [2020-12-22 10:25:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 10:25:51,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:51,132 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] [2020-12-22 10:25:51,132 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:51,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:51,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1872718509, now seen corresponding path program 1 times [2020-12-22 10:25:51,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:51,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655353852] [2020-12-22 10:25:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:51,583 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 10:25:51,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655353852] [2020-12-22 10:25:51,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:51,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:25:51,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332703026] [2020-12-22 10:25:51,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:25:51,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:51,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:25:51,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:25:51,610 INFO L87 Difference]: Start difference. First operand 964 states. Second operand 3 states. [2020-12-22 10:25:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:56,886 INFO L93 Difference]: Finished difference Result 2614 states and 5016 transitions. [2020-12-22 10:25:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:25:56,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-22 10:25:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:56,925 INFO L225 Difference]: With dead ends: 2614 [2020-12-22 10:25:56,926 INFO L226 Difference]: Without dead ends: 1649 [2020-12-22 10:25:56,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:25:56,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-12-22 10:25:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2020-12-22 10:25:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-12-22 10:25:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 3029 transitions. [2020-12-22 10:25:57,093 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 3029 transitions. Word has length 30 [2020-12-22 10:25:57,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:57,094 INFO L481 AbstractCegarLoop]: Abstraction has 1649 states and 3029 transitions. [2020-12-22 10:25:57,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:25:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 3029 transitions. [2020-12-22 10:25:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:25:57,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:57,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:25:57,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:25:57,098 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:57,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:57,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2020-12-22 10:25:57,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:57,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093481362] [2020-12-22 10:25:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:57,232 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 10:25:57,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093481362] [2020-12-22 10:25:57,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:57,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:25:57,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412627399] [2020-12-22 10:25:57,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:25:57,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:57,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:25:57,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:25:57,239 INFO L87 Difference]: Start difference. First operand 1649 states and 3029 transitions. Second operand 5 states. [2020-12-22 10:25:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:57,371 INFO L93 Difference]: Finished difference Result 1730 states and 3156 transitions. [2020-12-22 10:25:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:25:57,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:25:57,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:57,383 INFO L225 Difference]: With dead ends: 1730 [2020-12-22 10:25:57,383 INFO L226 Difference]: Without dead ends: 1649 [2020-12-22 10:25:57,385 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 10:25:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-12-22 10:25:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2020-12-22 10:25:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-12-22 10:25:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2968 transitions. [2020-12-22 10:25:57,507 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2968 transitions. Word has length 46 [2020-12-22 10:25:57,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:57,507 INFO L481 AbstractCegarLoop]: Abstraction has 1649 states and 2968 transitions. [2020-12-22 10:25:57,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:25:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2968 transitions. [2020-12-22 10:25:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 10:25:57,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:57,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:25:57,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:25:57,522 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:57,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:57,525 INFO L82 PathProgramCache]: Analyzing trace with hash -747036490, now seen corresponding path program 1 times [2020-12-22 10:25:57,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:57,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460997262] [2020-12-22 10:25:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:25:57,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460997262] [2020-12-22 10:25:57,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:57,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:25:57,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862219035] [2020-12-22 10:25:57,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:25:57,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:57,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:25:57,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:25:57,803 INFO L87 Difference]: Start difference. First operand 1649 states and 2968 transitions. Second operand 4 states. [2020-12-22 10:26:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:07,197 INFO L93 Difference]: Finished difference Result 5406 states and 9858 transitions. [2020-12-22 10:26:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:26:07,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-12-22 10:26:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:07,222 INFO L225 Difference]: With dead ends: 5406 [2020-12-22 10:26:07,222 INFO L226 Difference]: Without dead ends: 3902 [2020-12-22 10:26:07,226 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 10:26:07,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2020-12-22 10:26:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3902. [2020-12-22 10:26:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3902 states. [2020-12-22 10:26:07,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3902 states to 3902 states and 5557 transitions. [2020-12-22 10:26:07,332 INFO L78 Accepts]: Start accepts. Automaton has 3902 states and 5557 transitions. Word has length 99 [2020-12-22 10:26:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:07,333 INFO L481 AbstractCegarLoop]: Abstraction has 3902 states and 5557 transitions. [2020-12-22 10:26:07,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:26:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3902 states and 5557 transitions. [2020-12-22 10:26:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 10:26:07,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:07,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:07,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:26:07,336 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2057149349, now seen corresponding path program 1 times [2020-12-22 10:26:07,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:07,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210018618] [2020-12-22 10:26:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 10:26:07,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210018618] [2020-12-22 10:26:07,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:07,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:26:07,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628921222] [2020-12-22 10:26:07,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:07,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:07,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:07,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:07,473 INFO L87 Difference]: Start difference. First operand 3902 states and 5557 transitions. Second operand 3 states. [2020-12-22 10:26:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:12,885 INFO L93 Difference]: Finished difference Result 8410 states and 12940 transitions. [2020-12-22 10:26:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:12,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-12-22 10:26:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:12,913 INFO L225 Difference]: With dead ends: 8410 [2020-12-22 10:26:12,914 INFO L226 Difference]: Without dead ends: 5404 [2020-12-22 10:26:12,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2020-12-22 10:26:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 5404. [2020-12-22 10:26:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5404 states. [2020-12-22 10:26:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5404 states to 5404 states and 7479 transitions. [2020-12-22 10:26:13,038 INFO L78 Accepts]: Start accepts. Automaton has 5404 states and 7479 transitions. Word has length 101 [2020-12-22 10:26:13,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:13,038 INFO L481 AbstractCegarLoop]: Abstraction has 5404 states and 7479 transitions. [2020-12-22 10:26:13,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 5404 states and 7479 transitions. [2020-12-22 10:26:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:13,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:13,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:13,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:26:13,041 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:13,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2020-12-22 10:26:13,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:13,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243785437] [2020-12-22 10:26:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:26:13,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243785437] [2020-12-22 10:26:13,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:13,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:13,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474929638] [2020-12-22 10:26:13,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:13,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:13,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:13,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:13,187 INFO L87 Difference]: Start difference. First operand 5404 states and 7479 transitions. Second operand 3 states. [2020-12-22 10:26:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:13,248 INFO L93 Difference]: Finished difference Result 5552 states and 7715 transitions. [2020-12-22 10:26:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:13,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:13,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:13,278 INFO L225 Difference]: With dead ends: 5552 [2020-12-22 10:26:13,278 INFO L226 Difference]: Without dead ends: 5475 [2020-12-22 10:26:13,281 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 10:26:13,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2020-12-22 10:26:13,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 5473. [2020-12-22 10:26:13,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5473 states. [2020-12-22 10:26:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 7590 transitions. [2020-12-22 10:26:13,403 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 7590 transitions. Word has length 106 [2020-12-22 10:26:13,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:13,405 INFO L481 AbstractCegarLoop]: Abstraction has 5473 states and 7590 transitions. [2020-12-22 10:26:13,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:13,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 7590 transitions. [2020-12-22 10:26:13,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:13,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:13,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:13,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:26:13,408 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:13,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2020-12-22 10:26:13,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:13,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810670065] [2020-12-22 10:26:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:26:13,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810670065] [2020-12-22 10:26:13,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:13,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:13,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149408335] [2020-12-22 10:26:13,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:13,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:13,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:13,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:13,558 INFO L87 Difference]: Start difference. First operand 5473 states and 7590 transitions. Second operand 3 states. [2020-12-22 10:26:13,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:13,619 INFO L93 Difference]: Finished difference Result 5753 states and 8038 transitions. [2020-12-22 10:26:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:13,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:13,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:13,657 INFO L225 Difference]: With dead ends: 5753 [2020-12-22 10:26:13,657 INFO L226 Difference]: Without dead ends: 5607 [2020-12-22 10:26:13,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2020-12-22 10:26:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 5605. [2020-12-22 10:26:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5605 states. [2020-12-22 10:26:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 7801 transitions. [2020-12-22 10:26:13,784 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 7801 transitions. Word has length 106 [2020-12-22 10:26:13,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:13,785 INFO L481 AbstractCegarLoop]: Abstraction has 5605 states and 7801 transitions. [2020-12-22 10:26:13,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:13,785 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 7801 transitions. [2020-12-22 10:26:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:13,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:13,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:13,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:26:13,787 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:13,791 INFO L82 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2020-12-22 10:26:13,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:13,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559001928] [2020-12-22 10:26:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:13,900 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 10:26:13,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559001928] [2020-12-22 10:26:13,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:13,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:13,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633794641] [2020-12-22 10:26:13,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:13,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:13,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:13,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:13,903 INFO L87 Difference]: Start difference. First operand 5605 states and 7801 transitions. Second operand 3 states. [2020-12-22 10:26:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:13,968 INFO L93 Difference]: Finished difference Result 6137 states and 8651 transitions. [2020-12-22 10:26:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:13,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:13,995 INFO L225 Difference]: With dead ends: 6137 [2020-12-22 10:26:13,995 INFO L226 Difference]: Without dead ends: 5859 [2020-12-22 10:26:13,999 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 10:26:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5859 states. [2020-12-22 10:26:14,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5859 to 5857. [2020-12-22 10:26:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5857 states. [2020-12-22 10:26:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5857 states to 5857 states and 8201 transitions. [2020-12-22 10:26:14,128 INFO L78 Accepts]: Start accepts. Automaton has 5857 states and 8201 transitions. Word has length 106 [2020-12-22 10:26:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:14,129 INFO L481 AbstractCegarLoop]: Abstraction has 5857 states and 8201 transitions. [2020-12-22 10:26:14,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5857 states and 8201 transitions. [2020-12-22 10:26:14,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:14,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:14,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:14,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:26:14,134 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:14,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:14,135 INFO L82 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2020-12-22 10:26:14,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:14,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118150870] [2020-12-22 10:26:14,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:14,252 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 10:26:14,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118150870] [2020-12-22 10:26:14,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:14,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:14,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661736235] [2020-12-22 10:26:14,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:14,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:14,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:14,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:14,255 INFO L87 Difference]: Start difference. First operand 5857 states and 8201 transitions. Second operand 3 states. [2020-12-22 10:26:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:14,326 INFO L93 Difference]: Finished difference Result 6869 states and 9811 transitions. [2020-12-22 10:26:14,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:14,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:14,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:14,341 INFO L225 Difference]: With dead ends: 6869 [2020-12-22 10:26:14,341 INFO L226 Difference]: Without dead ends: 6339 [2020-12-22 10:26:14,345 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 10:26:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6339 states. [2020-12-22 10:26:14,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6339 to 6337. [2020-12-22 10:26:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6337 states. [2020-12-22 10:26:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6337 states to 6337 states and 8957 transitions. [2020-12-22 10:26:14,495 INFO L78 Accepts]: Start accepts. Automaton has 6337 states and 8957 transitions. Word has length 106 [2020-12-22 10:26:14,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:14,496 INFO L481 AbstractCegarLoop]: Abstraction has 6337 states and 8957 transitions. [2020-12-22 10:26:14,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 6337 states and 8957 transitions. [2020-12-22 10:26:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:14,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:14,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:14,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:26:14,498 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:14,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:14,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2020-12-22 10:26:14,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:14,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699057882] [2020-12-22 10:26:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:14,611 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 10:26:14,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699057882] [2020-12-22 10:26:14,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:14,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:14,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847755418] [2020-12-22 10:26:14,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:14,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:14,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:14,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:14,615 INFO L87 Difference]: Start difference. First operand 6337 states and 8957 transitions. Second operand 3 states. [2020-12-22 10:26:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:14,720 INFO L93 Difference]: Finished difference Result 8261 states and 11999 transitions. [2020-12-22 10:26:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:14,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:14,737 INFO L225 Difference]: With dead ends: 8261 [2020-12-22 10:26:14,737 INFO L226 Difference]: Without dead ends: 7251 [2020-12-22 10:26:14,742 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 10:26:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7251 states. [2020-12-22 10:26:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7251 to 7249. [2020-12-22 10:26:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7249 states. [2020-12-22 10:26:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 10381 transitions. [2020-12-22 10:26:15,014 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 10381 transitions. Word has length 106 [2020-12-22 10:26:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:15,015 INFO L481 AbstractCegarLoop]: Abstraction has 7249 states and 10381 transitions. [2020-12-22 10:26:15,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 10381 transitions. [2020-12-22 10:26:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:15,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:15,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:15,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:26:15,017 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:15,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2020-12-22 10:26:15,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:15,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530537907] [2020-12-22 10:26:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:15,108 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 10:26:15,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530537907] [2020-12-22 10:26:15,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:15,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:15,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644567863] [2020-12-22 10:26:15,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:15,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:15,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:15,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:15,115 INFO L87 Difference]: Start difference. First operand 7249 states and 10381 transitions. Second operand 3 states. [2020-12-22 10:26:15,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:15,271 INFO L93 Difference]: Finished difference Result 10901 states and 16111 transitions. [2020-12-22 10:26:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:15,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:15,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:15,291 INFO L225 Difference]: With dead ends: 10901 [2020-12-22 10:26:15,291 INFO L226 Difference]: Without dead ends: 8979 [2020-12-22 10:26:15,297 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 10:26:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8979 states. [2020-12-22 10:26:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8979 to 8977. [2020-12-22 10:26:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8977 states. [2020-12-22 10:26:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8977 states to 8977 states and 13053 transitions. [2020-12-22 10:26:15,543 INFO L78 Accepts]: Start accepts. Automaton has 8977 states and 13053 transitions. Word has length 106 [2020-12-22 10:26:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:15,544 INFO L481 AbstractCegarLoop]: Abstraction has 8977 states and 13053 transitions. [2020-12-22 10:26:15,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 8977 states and 13053 transitions. [2020-12-22 10:26:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:15,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:15,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:15,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:26:15,546 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:15,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2020-12-22 10:26:15,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:15,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434132811] [2020-12-22 10:26:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:15,642 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 10:26:15,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434132811] [2020-12-22 10:26:15,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:15,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:15,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295068608] [2020-12-22 10:26:15,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:15,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:15,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:15,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:15,646 INFO L87 Difference]: Start difference. First operand 8977 states and 13053 transitions. Second operand 3 states. [2020-12-22 10:26:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:15,909 INFO L93 Difference]: Finished difference Result 15893 states and 23807 transitions. [2020-12-22 10:26:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:15,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:15,935 INFO L225 Difference]: With dead ends: 15893 [2020-12-22 10:26:15,935 INFO L226 Difference]: Without dead ends: 12243 [2020-12-22 10:26:15,943 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 10:26:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12243 states. [2020-12-22 10:26:16,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12243 to 12241. [2020-12-22 10:26:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12241 states. [2020-12-22 10:26:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12241 states to 12241 states and 18045 transitions. [2020-12-22 10:26:16,328 INFO L78 Accepts]: Start accepts. Automaton has 12241 states and 18045 transitions. Word has length 106 [2020-12-22 10:26:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:16,329 INFO L481 AbstractCegarLoop]: Abstraction has 12241 states and 18045 transitions. [2020-12-22 10:26:16,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 12241 states and 18045 transitions. [2020-12-22 10:26:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:16,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:16,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:16,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:26:16,331 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:16,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:16,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2020-12-22 10:26:16,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:16,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394031929] [2020-12-22 10:26:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:16,493 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 10:26:16,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394031929] [2020-12-22 10:26:16,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:16,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:16,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986049478] [2020-12-22 10:26:16,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:16,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:16,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:16,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:16,495 INFO L87 Difference]: Start difference. First operand 12241 states and 18045 transitions. Second operand 10 states. [2020-12-22 10:26:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:20,474 INFO L93 Difference]: Finished difference Result 122865 states and 189069 transitions. [2020-12-22 10:26:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:26:20,475 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:26:20,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:20,796 INFO L225 Difference]: With dead ends: 122865 [2020-12-22 10:26:20,796 INFO L226 Difference]: Without dead ends: 115951 [2020-12-22 10:26:20,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:26:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115951 states. [2020-12-22 10:26:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115951 to 19153. [2020-12-22 10:26:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19153 states. [2020-12-22 10:26:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19153 states to 19153 states and 28477 transitions. [2020-12-22 10:26:23,094 INFO L78 Accepts]: Start accepts. Automaton has 19153 states and 28477 transitions. Word has length 106 [2020-12-22 10:26:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:23,094 INFO L481 AbstractCegarLoop]: Abstraction has 19153 states and 28477 transitions. [2020-12-22 10:26:23,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 19153 states and 28477 transitions. [2020-12-22 10:26:23,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:23,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:23,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:23,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:26:23,097 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:23,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:23,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2020-12-22 10:26:23,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:23,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553992257] [2020-12-22 10:26:23,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:23,206 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 10:26:23,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553992257] [2020-12-22 10:26:23,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:23,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:23,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634585320] [2020-12-22 10:26:23,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:23,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:23,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:23,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:23,214 INFO L87 Difference]: Start difference. First operand 19153 states and 28477 transitions. Second operand 3 states. [2020-12-22 10:26:24,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:24,591 INFO L93 Difference]: Finished difference Result 45397 states and 68287 transitions. [2020-12-22 10:26:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:24,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:24,660 INFO L225 Difference]: With dead ends: 45397 [2020-12-22 10:26:24,661 INFO L226 Difference]: Without dead ends: 31571 [2020-12-22 10:26:24,678 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 10:26:24,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31571 states. [2020-12-22 10:26:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31571 to 31313. [2020-12-22 10:26:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31313 states. [2020-12-22 10:26:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31313 states to 31313 states and 46269 transitions. [2020-12-22 10:26:26,329 INFO L78 Accepts]: Start accepts. Automaton has 31313 states and 46269 transitions. Word has length 108 [2020-12-22 10:26:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:26,330 INFO L481 AbstractCegarLoop]: Abstraction has 31313 states and 46269 transitions. [2020-12-22 10:26:26,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 31313 states and 46269 transitions. [2020-12-22 10:26:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:26,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:26,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:26,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:26:26,333 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2020-12-22 10:26:26,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:26,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184213263] [2020-12-22 10:26:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:26,738 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 10:26:26,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184213263] [2020-12-22 10:26:26,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:26,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:26,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656685984] [2020-12-22 10:26:26,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:26,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:26,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:26,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:26,741 INFO L87 Difference]: Start difference. First operand 31313 states and 46269 transitions. Second operand 10 states. [2020-12-22 10:26:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:28,729 INFO L93 Difference]: Finished difference Result 57301 states and 85183 transitions. [2020-12-22 10:26:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:28,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:26:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:28,768 INFO L225 Difference]: With dead ends: 57301 [2020-12-22 10:26:28,769 INFO L226 Difference]: Without dead ends: 31315 [2020-12-22 10:26:28,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:26:28,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31315 states. [2020-12-22 10:26:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31315 to 31313. [2020-12-22 10:26:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31313 states. [2020-12-22 10:26:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31313 states to 31313 states and 46013 transitions. [2020-12-22 10:26:30,721 INFO L78 Accepts]: Start accepts. Automaton has 31313 states and 46013 transitions. Word has length 108 [2020-12-22 10:26:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:30,722 INFO L481 AbstractCegarLoop]: Abstraction has 31313 states and 46013 transitions. [2020-12-22 10:26:30,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 31313 states and 46013 transitions. [2020-12-22 10:26:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:26:30,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:30,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:30,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:26:30,723 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:30,724 INFO L82 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2020-12-22 10:26:30,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:30,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098892875] [2020-12-22 10:26:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:30,871 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 10:26:30,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098892875] [2020-12-22 10:26:30,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:30,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:26:30,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141345810] [2020-12-22 10:26:30,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:26:30,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:30,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:26:30,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:26:30,874 INFO L87 Difference]: Start difference. First operand 31313 states and 46013 transitions. Second operand 6 states. [2020-12-22 10:26:32,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:32,670 INFO L93 Difference]: Finished difference Result 57299 states and 84670 transitions. [2020-12-22 10:26:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:26:32,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-12-22 10:26:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:32,703 INFO L225 Difference]: With dead ends: 57299 [2020-12-22 10:26:32,703 INFO L226 Difference]: Without dead ends: 31313 [2020-12-22 10:26:32,722 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 10:26:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31313 states. [2020-12-22 10:26:34,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31313 to 31313. [2020-12-22 10:26:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31313 states. [2020-12-22 10:26:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31313 states to 31313 states and 45757 transitions. [2020-12-22 10:26:34,696 INFO L78 Accepts]: Start accepts. Automaton has 31313 states and 45757 transitions. Word has length 109 [2020-12-22 10:26:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:34,697 INFO L481 AbstractCegarLoop]: Abstraction has 31313 states and 45757 transitions. [2020-12-22 10:26:34,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:26:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 31313 states and 45757 transitions. [2020-12-22 10:26:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:26:34,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:34,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:34,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:26:34,699 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:34,699 INFO L82 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2020-12-22 10:26:34,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:34,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337010679] [2020-12-22 10:26:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:34,824 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 10:26:34,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337010679] [2020-12-22 10:26:34,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:34,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:26:34,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073360693] [2020-12-22 10:26:34,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:26:34,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:34,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:26:34,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:26:34,827 INFO L87 Difference]: Start difference. First operand 31313 states and 45757 transitions. Second operand 8 states. [2020-12-22 10:26:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:37,982 INFO L93 Difference]: Finished difference Result 50683 states and 73970 transitions. [2020-12-22 10:26:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:37,983 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:26:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:38,078 INFO L225 Difference]: With dead ends: 50683 [2020-12-22 10:26:38,079 INFO L226 Difference]: Without dead ends: 50681 [2020-12-22 10:26:38,099 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 10:26:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50681 states. [2020-12-22 10:26:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50681 to 32081. [2020-12-22 10:26:40,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32081 states. [2020-12-22 10:26:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32081 states to 32081 states and 46397 transitions. [2020-12-22 10:26:40,900 INFO L78 Accepts]: Start accepts. Automaton has 32081 states and 46397 transitions. Word has length 109 [2020-12-22 10:26:40,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:40,901 INFO L481 AbstractCegarLoop]: Abstraction has 32081 states and 46397 transitions. [2020-12-22 10:26:40,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:26:40,901 INFO L276 IsEmpty]: Start isEmpty. Operand 32081 states and 46397 transitions. [2020-12-22 10:26:40,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 10:26:40,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:40,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:40,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:26:40,903 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:40,903 INFO L82 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2020-12-22 10:26:40,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:40,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047465121] [2020-12-22 10:26:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:40,973 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 10:26:40,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047465121] [2020-12-22 10:26:40,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:40,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:40,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118607136] [2020-12-22 10:26:40,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:40,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:40,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:40,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:40,975 INFO L87 Difference]: Start difference. First operand 32081 states and 46397 transitions. Second operand 3 states. [2020-12-22 10:26:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:43,847 INFO L93 Difference]: Finished difference Result 59224 states and 86339 transitions. [2020-12-22 10:26:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:43,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 10:26:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:43,894 INFO L225 Difference]: With dead ends: 59224 [2020-12-22 10:26:43,894 INFO L226 Difference]: Without dead ends: 44629 [2020-12-22 10:26:43,903 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 10:26:43,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44629 states. [2020-12-22 10:26:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44629 to 44627. [2020-12-22 10:26:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44627 states. [2020-12-22 10:26:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44627 states to 44627 states and 64447 transitions. [2020-12-22 10:26:46,895 INFO L78 Accepts]: Start accepts. Automaton has 44627 states and 64447 transitions. Word has length 110 [2020-12-22 10:26:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:46,895 INFO L481 AbstractCegarLoop]: Abstraction has 44627 states and 64447 transitions. [2020-12-22 10:26:46,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 44627 states and 64447 transitions. [2020-12-22 10:26:46,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:26:46,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:46,920 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:46,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:26:46,920 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash 45078639, now seen corresponding path program 1 times [2020-12-22 10:26:46,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:46,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829705475] [2020-12-22 10:26:46,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:26:47,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829705475] [2020-12-22 10:26:47,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:47,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:47,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028304979] [2020-12-22 10:26:47,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:47,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:47,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:47,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:47,139 INFO L87 Difference]: Start difference. First operand 44627 states and 64447 transitions. Second operand 10 states. [2020-12-22 10:27:09,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:09,307 INFO L93 Difference]: Finished difference Result 366565 states and 531784 transitions. [2020-12-22 10:27:09,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:09,308 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:27:09,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:09,998 INFO L225 Difference]: With dead ends: 366565 [2020-12-22 10:27:09,998 INFO L226 Difference]: Without dead ends: 327267 [2020-12-22 10:27:10,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:27:10,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327267 states. [2020-12-22 10:27:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327267 to 83923. [2020-12-22 10:27:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83923 states. [2020-12-22 10:27:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83923 states to 83923 states and 121151 transitions. [2020-12-22 10:27:18,347 INFO L78 Accepts]: Start accepts. Automaton has 83923 states and 121151 transitions. Word has length 148 [2020-12-22 10:27:18,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:18,347 INFO L481 AbstractCegarLoop]: Abstraction has 83923 states and 121151 transitions. [2020-12-22 10:27:18,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 83923 states and 121151 transitions. [2020-12-22 10:27:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:18,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:18,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:18,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:27:18,377 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:18,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:18,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1723704177, now seen corresponding path program 1 times [2020-12-22 10:27:18,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:18,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146147176] [2020-12-22 10:27:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:18,624 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 10:27:18,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146147176] [2020-12-22 10:27:18,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:18,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:18,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132228830] [2020-12-22 10:27:18,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:18,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:18,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:18,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:18,628 INFO L87 Difference]: Start difference. First operand 83923 states and 121151 transitions. Second operand 10 states. [2020-12-22 10:27:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:45,391 INFO L93 Difference]: Finished difference Result 405861 states and 588488 transitions. [2020-12-22 10:27:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:45,391 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:27:45,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:45,938 INFO L225 Difference]: With dead ends: 405861 [2020-12-22 10:27:45,943 INFO L226 Difference]: Without dead ends: 366563 [2020-12-22 10:27:46,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:27:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366563 states. [2020-12-22 10:27:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366563 to 142931. [2020-12-22 10:27:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142931 states. [2020-12-22 10:27:59,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142931 states to 142931 states and 205887 transitions. [2020-12-22 10:27:59,583 INFO L78 Accepts]: Start accepts. Automaton has 142931 states and 205887 transitions. Word has length 148 [2020-12-22 10:27:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:59,588 INFO L481 AbstractCegarLoop]: Abstraction has 142931 states and 205887 transitions. [2020-12-22 10:27:59,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand 142931 states and 205887 transitions. [2020-12-22 10:27:59,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:59,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:59,621 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:59,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:27:59,622 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:59,623 INFO L82 PathProgramCache]: Analyzing trace with hash -592064337, now seen corresponding path program 1 times [2020-12-22 10:27:59,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:59,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693559860] [2020-12-22 10:27:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:27:59,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693559860] [2020-12-22 10:27:59,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:59,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:59,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277880957] [2020-12-22 10:27:59,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:59,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:59,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:59,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:59,856 INFO L87 Difference]: Start difference. First operand 142931 states and 205887 transitions. Second operand 10 states. [2020-12-22 10:28:32,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:32,248 INFO L93 Difference]: Finished difference Result 445157 states and 645192 transitions. [2020-12-22 10:28:32,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:32,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:28:32,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:33,071 INFO L225 Difference]: With dead ends: 445157 [2020-12-22 10:28:33,071 INFO L226 Difference]: Without dead ends: 405859 [2020-12-22 10:28:33,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405859 states. [2020-12-22 10:28:50,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405859 to 182227. [2020-12-22 10:28:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182227 states. [2020-12-22 10:28:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182227 states to 182227 states and 262591 transitions. [2020-12-22 10:28:51,385 INFO L78 Accepts]: Start accepts. Automaton has 182227 states and 262591 transitions. Word has length 148 [2020-12-22 10:28:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:51,385 INFO L481 AbstractCegarLoop]: Abstraction has 182227 states and 262591 transitions. [2020-12-22 10:28:51,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:28:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 182227 states and 262591 transitions. [2020-12-22 10:28:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:28:51,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:51,412 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:51,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:28:51,412 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:51,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:51,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1827523377, now seen corresponding path program 1 times [2020-12-22 10:28:51,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:51,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568725828] [2020-12-22 10:28:51,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:51,678 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 10:28:51,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568725828] [2020-12-22 10:28:51,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:51,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:28:51,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425388597] [2020-12-22 10:28:51,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:28:51,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:51,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:28:51,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:28:51,683 INFO L87 Difference]: Start difference. First operand 182227 states and 262591 transitions. Second operand 10 states.