/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.7_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:17:22,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:17:22,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:17:22,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:17:22,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:17:22,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:17:22,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:17:22,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:17:22,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:17:22,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:17:22,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:17:22,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:17:22,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:17:22,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:17:22,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:17:22,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:17:22,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:17:22,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:17:22,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:17:22,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:17:22,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:17:22,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:17:22,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:17:22,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:17:22,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:17:22,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:17:22,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:17:22,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:17:22,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:17:22,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:17:22,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:17:22,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:17:22,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:17:22,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:17:22,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:17:22,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:17:22,318 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:17:22,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:17:22,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:17:22,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:17:22,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:17:22,367 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:17:22,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:17:22,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:17:22,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:17:22,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:17:22,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:17:22,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:17:22,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:17:22,369 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:17:22,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:17:22,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:17:22,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:17:22,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:17:22,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:17:22,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:17:22,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:17:22,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:17:22,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:17:22,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:17:22,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:17:22,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:17:22,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:17:22,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:17:22,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:17:22,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:17:22,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:17:22,757 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:17:22,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:17:22,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f27d6d11/be57adb1ad024e19a68654d04b81b506/FLAGe10f4e924 [2020-12-22 10:17:23,853 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:17:23,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:17:23,904 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f27d6d11/be57adb1ad024e19a68654d04b81b506/FLAGe10f4e924 [2020-12-22 10:17:24,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f27d6d11/be57adb1ad024e19a68654d04b81b506 [2020-12-22 10:17:24,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:17:24,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:17:24,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:17:24,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:17:24,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:17:24,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:17:24" (1/1) ... [2020-12-22 10:17:24,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2b648e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:24, skipping insertion in model container [2020-12-22 10:17:24,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:17:24" (1/1) ... [2020-12-22 10:17:24,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:17:24,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:17:25,033 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.7_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[20646,20659] [2020-12-22 10:17:25,161 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.7_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[27693,27706] [2020-12-22 10:17:26,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:17:26,107 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:17:26,178 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.7_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[20646,20659] [2020-12-22 10:17:26,194 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.7_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[27693,27706] [2020-12-22 10:17:26,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:17:26,888 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:17:26,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:26 WrapperNode [2020-12-22 10:17:26,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:17:26,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:17:26,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:17:26,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:17:26,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:26" (1/1) ... [2020-12-22 10:17:27,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:26" (1/1) ... [2020-12-22 10:17:27,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:17:27,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:17:27,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:17:27,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:17:27,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:26" (1/1) ... [2020-12-22 10:17:27,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:26" (1/1) ... [2020-12-22 10:17:27,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:26" (1/1) ... [2020-12-22 10:17:27,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:26" (1/1) ... [2020-12-22 10:17:27,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:26" (1/1) ... [2020-12-22 10:17:27,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:26" (1/1) ... [2020-12-22 10:17:27,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:26" (1/1) ... [2020-12-22 10:17:28,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:17:28,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:17:28,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:17:28,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:17:28,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:26" (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 10:17:28,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:17:28,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:17:28,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:17:28,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:17:33,773 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:17:33,773 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:17:33,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:17:33 BoogieIcfgContainer [2020-12-22 10:17:33,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:17:33,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:17:33,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:17:33,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:17:33,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:17:24" (1/3) ... [2020-12-22 10:17:33,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1558411b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:17:33, skipping insertion in model container [2020-12-22 10:17:33,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:26" (2/3) ... [2020-12-22 10:17:33,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1558411b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:17:33, skipping insertion in model container [2020-12-22 10:17:33,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:17:33" (3/3) ... [2020-12-22 10:17:33,786 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:17:33,792 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:17:33,798 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:17:33,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:17:33,849 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:17:33,849 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:17:33,849 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:17:33,849 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:17:33,849 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:17:33,850 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:17:33,850 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:17:33,850 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:17:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states. [2020-12-22 10:17:33,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:17:33,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:33,894 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] [2020-12-22 10:17:33,894 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:33,900 INFO L82 PathProgramCache]: Analyzing trace with hash 720070723, now seen corresponding path program 1 times [2020-12-22 10:17:33,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:33,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885740020] [2020-12-22 10:17:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:17:34,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885740020] [2020-12-22 10:17:34,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:34,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:17:34,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367883979] [2020-12-22 10:17:34,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:17:34,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:34,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:17:34,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:17:34,270 INFO L87 Difference]: Start difference. First operand 943 states. Second operand 2 states. [2020-12-22 10:17:34,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:34,365 INFO L93 Difference]: Finished difference Result 1828 states and 3460 transitions. [2020-12-22 10:17:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:17:34,367 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:17:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:34,414 INFO L225 Difference]: With dead ends: 1828 [2020-12-22 10:17:34,414 INFO L226 Difference]: Without dead ends: 877 [2020-12-22 10:17:34,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:17:34,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2020-12-22 10:17:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2020-12-22 10:17:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2020-12-22 10:17:34,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1652 transitions. [2020-12-22 10:17:34,510 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1652 transitions. Word has length 42 [2020-12-22 10:17:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:34,510 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1652 transitions. [2020-12-22 10:17:34,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:17:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1652 transitions. [2020-12-22 10:17:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:17:34,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:34,513 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] [2020-12-22 10:17:34,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:17:34,514 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:34,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:34,515 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:17:34,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:34,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742739012] [2020-12-22 10:17:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:34,667 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 10:17:34,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742739012] [2020-12-22 10:17:34,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:34,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:17:34,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900991607] [2020-12-22 10:17:34,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:17:34,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:34,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:17:34,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:17:34,671 INFO L87 Difference]: Start difference. First operand 877 states and 1652 transitions. Second operand 5 states. [2020-12-22 10:17:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:34,831 INFO L93 Difference]: Finished difference Result 948 states and 1763 transitions. [2020-12-22 10:17:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:17:34,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:17:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:34,837 INFO L225 Difference]: With dead ends: 948 [2020-12-22 10:17:34,837 INFO L226 Difference]: Without dead ends: 877 [2020-12-22 10:17:34,839 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 10:17:34,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2020-12-22 10:17:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2020-12-22 10:17:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2020-12-22 10:17:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1602 transitions. [2020-12-22 10:17:34,863 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1602 transitions. Word has length 42 [2020-12-22 10:17:34,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:34,864 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1602 transitions. [2020-12-22 10:17:34,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:17:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1602 transitions. [2020-12-22 10:17:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 10:17:34,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:34,867 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] [2020-12-22 10:17:34,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:17:34,867 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:34,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:34,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2100051488, now seen corresponding path program 1 times [2020-12-22 10:17:34,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:34,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106621342] [2020-12-22 10:17:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:35,124 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 10:17:35,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106621342] [2020-12-22 10:17:35,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:35,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:35,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023734623] [2020-12-22 10:17:35,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:17:35,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:35,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:17:35,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:17:35,127 INFO L87 Difference]: Start difference. First operand 877 states and 1602 transitions. Second operand 4 states. [2020-12-22 10:17:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:45,728 INFO L93 Difference]: Finished difference Result 3132 states and 5911 transitions. [2020-12-22 10:17:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:17:45,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 10:17:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:45,743 INFO L225 Difference]: With dead ends: 3132 [2020-12-22 10:17:45,743 INFO L226 Difference]: Without dead ends: 2379 [2020-12-22 10:17:45,745 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 10:17:45,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2020-12-22 10:17:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2379. [2020-12-22 10:17:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2379 states. [2020-12-22 10:17:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 3578 transitions. [2020-12-22 10:17:45,801 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 3578 transitions. Word has length 63 [2020-12-22 10:17:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:45,802 INFO L481 AbstractCegarLoop]: Abstraction has 2379 states and 3578 transitions. [2020-12-22 10:17:45,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:17:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 3578 transitions. [2020-12-22 10:17:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:45,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:45,806 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] [2020-12-22 10:17:45,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:17:45,807 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:45,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:17:45,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:45,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845044131] [2020-12-22 10:17:45,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:45,939 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 10:17:45,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845044131] [2020-12-22 10:17:45,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:45,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:45,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938943566] [2020-12-22 10:17:45,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:45,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:45,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:45,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:45,943 INFO L87 Difference]: Start difference. First operand 2379 states and 3578 transitions. Second operand 3 states. [2020-12-22 10:17:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:46,056 INFO L93 Difference]: Finished difference Result 2507 states and 3782 transitions. [2020-12-22 10:17:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:46,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:46,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:46,072 INFO L225 Difference]: With dead ends: 2507 [2020-12-22 10:17:46,072 INFO L226 Difference]: Without dead ends: 2440 [2020-12-22 10:17:46,074 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 10:17:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2020-12-22 10:17:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2438. [2020-12-22 10:17:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-12-22 10:17:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 3673 transitions. [2020-12-22 10:17:46,135 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 3673 transitions. Word has length 91 [2020-12-22 10:17:46,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:46,137 INFO L481 AbstractCegarLoop]: Abstraction has 2438 states and 3673 transitions. [2020-12-22 10:17:46,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:46,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 3673 transitions. [2020-12-22 10:17:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:46,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:46,145 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] [2020-12-22 10:17:46,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:17:46,145 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:46,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:17:46,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:46,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443413875] [2020-12-22 10:17:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:46,307 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 10:17:46,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443413875] [2020-12-22 10:17:46,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:46,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:46,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390655698] [2020-12-22 10:17:46,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:46,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:46,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:46,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:46,312 INFO L87 Difference]: Start difference. First operand 2438 states and 3673 transitions. Second operand 3 states. [2020-12-22 10:17:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:46,365 INFO L93 Difference]: Finished difference Result 2678 states and 4057 transitions. [2020-12-22 10:17:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:46,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:46,380 INFO L225 Difference]: With dead ends: 2678 [2020-12-22 10:17:46,380 INFO L226 Difference]: Without dead ends: 2552 [2020-12-22 10:17:46,382 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 10:17:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2020-12-22 10:17:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2550. [2020-12-22 10:17:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2550 states. [2020-12-22 10:17:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3852 transitions. [2020-12-22 10:17:46,445 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3852 transitions. Word has length 91 [2020-12-22 10:17:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:46,446 INFO L481 AbstractCegarLoop]: Abstraction has 2550 states and 3852 transitions. [2020-12-22 10:17:46,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3852 transitions. [2020-12-22 10:17:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:46,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:46,448 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] [2020-12-22 10:17:46,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:17:46,448 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:46,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:46,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:17:46,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:46,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169815585] [2020-12-22 10:17:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:46,526 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 10:17:46,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169815585] [2020-12-22 10:17:46,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:46,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:46,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185518248] [2020-12-22 10:17:46,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:46,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:46,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:46,529 INFO L87 Difference]: Start difference. First operand 2550 states and 3852 transitions. Second operand 3 states. [2020-12-22 10:17:46,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:46,591 INFO L93 Difference]: Finished difference Result 3002 states and 4574 transitions. [2020-12-22 10:17:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:46,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:46,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:46,609 INFO L225 Difference]: With dead ends: 3002 [2020-12-22 10:17:46,610 INFO L226 Difference]: Without dead ends: 2764 [2020-12-22 10:17:46,612 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 10:17:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2020-12-22 10:17:46,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2762. [2020-12-22 10:17:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2762 states. [2020-12-22 10:17:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 4188 transitions. [2020-12-22 10:17:46,685 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 4188 transitions. Word has length 91 [2020-12-22 10:17:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:46,686 INFO L481 AbstractCegarLoop]: Abstraction has 2762 states and 4188 transitions. [2020-12-22 10:17:46,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 4188 transitions. [2020-12-22 10:17:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:46,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:46,687 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] [2020-12-22 10:17:46,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:17:46,688 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:46,688 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:17:46,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:46,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132695172] [2020-12-22 10:17:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:46,775 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 10:17:46,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132695172] [2020-12-22 10:17:46,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:46,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:46,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814657867] [2020-12-22 10:17:46,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:46,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:46,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:46,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:46,778 INFO L87 Difference]: Start difference. First operand 2762 states and 4188 transitions. Second operand 3 states. [2020-12-22 10:17:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:46,849 INFO L93 Difference]: Finished difference Result 3614 states and 5542 transitions. [2020-12-22 10:17:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:46,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:46,867 INFO L225 Difference]: With dead ends: 3614 [2020-12-22 10:17:46,867 INFO L226 Difference]: Without dead ends: 3164 [2020-12-22 10:17:46,869 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 10:17:46,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2020-12-22 10:17:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 3162. [2020-12-22 10:17:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3162 states. [2020-12-22 10:17:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 4816 transitions. [2020-12-22 10:17:46,961 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 4816 transitions. Word has length 91 [2020-12-22 10:17:46,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:46,962 INFO L481 AbstractCegarLoop]: Abstraction has 3162 states and 4816 transitions. [2020-12-22 10:17:46,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 4816 transitions. [2020-12-22 10:17:46,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:46,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:46,964 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] [2020-12-22 10:17:46,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:17:46,964 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:46,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:17:46,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:46,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686705382] [2020-12-22 10:17:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:47,067 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 10:17:47,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686705382] [2020-12-22 10:17:47,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:47,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:47,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835717657] [2020-12-22 10:17:47,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:47,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:47,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:47,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:47,070 INFO L87 Difference]: Start difference. First operand 3162 states and 4816 transitions. Second operand 3 states. [2020-12-22 10:17:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:47,184 INFO L93 Difference]: Finished difference Result 4766 states and 7346 transitions. [2020-12-22 10:17:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:47,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:47,207 INFO L225 Difference]: With dead ends: 4766 [2020-12-22 10:17:47,207 INFO L226 Difference]: Without dead ends: 3916 [2020-12-22 10:17:47,210 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 10:17:47,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2020-12-22 10:17:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3914. [2020-12-22 10:17:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3914 states. [2020-12-22 10:17:47,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 5984 transitions. [2020-12-22 10:17:47,389 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 5984 transitions. Word has length 91 [2020-12-22 10:17:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:47,389 INFO L481 AbstractCegarLoop]: Abstraction has 3914 states and 5984 transitions. [2020-12-22 10:17:47,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 5984 transitions. [2020-12-22 10:17:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:47,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:47,391 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] [2020-12-22 10:17:47,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:17:47,392 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:47,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:47,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:17:47,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:47,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961709251] [2020-12-22 10:17:47,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:47,601 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 10:17:47,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961709251] [2020-12-22 10:17:47,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:47,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:47,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101253294] [2020-12-22 10:17:47,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:47,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:47,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:47,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:47,605 INFO L87 Difference]: Start difference. First operand 3914 states and 5984 transitions. Second operand 9 states. [2020-12-22 10:17:49,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:49,058 INFO L93 Difference]: Finished difference Result 26342 states and 41166 transitions. [2020-12-22 10:17:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:17:49,058 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:17:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:49,156 INFO L225 Difference]: With dead ends: 26342 [2020-12-22 10:17:49,156 INFO L226 Difference]: Without dead ends: 24740 [2020-12-22 10:17:49,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:17:49,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24740 states. [2020-12-22 10:17:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24740 to 5514. [2020-12-22 10:17:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5514 states. [2020-12-22 10:17:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 8432 transitions. [2020-12-22 10:17:49,703 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 8432 transitions. Word has length 91 [2020-12-22 10:17:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:49,703 INFO L481 AbstractCegarLoop]: Abstraction has 5514 states and 8432 transitions. [2020-12-22 10:17:49,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 8432 transitions. [2020-12-22 10:17:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:17:49,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:49,705 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] [2020-12-22 10:17:49,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:17:49,705 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:49,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:49,706 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:17:49,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:49,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262014103] [2020-12-22 10:17:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:49,841 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 10:17:49,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262014103] [2020-12-22 10:17:49,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:49,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:49,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777558051] [2020-12-22 10:17:49,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:49,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:49,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:49,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:49,846 INFO L87 Difference]: Start difference. First operand 5514 states and 8432 transitions. Second operand 3 states. [2020-12-22 10:17:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:50,164 INFO L93 Difference]: Finished difference Result 10240 states and 15748 transitions. [2020-12-22 10:17:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:50,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:17:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:50,184 INFO L225 Difference]: With dead ends: 10240 [2020-12-22 10:17:50,184 INFO L226 Difference]: Without dead ends: 7038 [2020-12-22 10:17:50,190 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 10:17:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2020-12-22 10:17:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 7036. [2020-12-22 10:17:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7036 states. [2020-12-22 10:17:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 10738 transitions. [2020-12-22 10:17:50,616 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 10738 transitions. Word has length 93 [2020-12-22 10:17:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:50,616 INFO L481 AbstractCegarLoop]: Abstraction has 7036 states and 10738 transitions. [2020-12-22 10:17:50,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 10738 transitions. [2020-12-22 10:17:50,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:17:50,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:50,621 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] [2020-12-22 10:17:50,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:17:50,621 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:50,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:50,622 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:17:50,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:50,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786643251] [2020-12-22 10:17:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:50,958 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 10:17:50,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786643251] [2020-12-22 10:17:50,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:50,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:50,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647406013] [2020-12-22 10:17:50,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:50,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:50,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:50,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:50,960 INFO L87 Difference]: Start difference. First operand 7036 states and 10738 transitions. Second operand 9 states. [2020-12-22 10:17:51,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:51,734 INFO L93 Difference]: Finished difference Result 11760 states and 18004 transitions. [2020-12-22 10:17:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:51,735 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:17:51,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:51,749 INFO L225 Difference]: With dead ends: 11760 [2020-12-22 10:17:51,750 INFO L226 Difference]: Without dead ends: 7038 [2020-12-22 10:17:51,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:17:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2020-12-22 10:17:52,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 7036. [2020-12-22 10:17:52,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7036 states. [2020-12-22 10:17:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 10690 transitions. [2020-12-22 10:17:52,267 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 10690 transitions. Word has length 93 [2020-12-22 10:17:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:52,268 INFO L481 AbstractCegarLoop]: Abstraction has 7036 states and 10690 transitions. [2020-12-22 10:17:52,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 10690 transitions. [2020-12-22 10:17:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:17:52,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:52,270 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] [2020-12-22 10:17:52,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:17:52,270 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:52,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:52,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:17:52,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:52,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239155293] [2020-12-22 10:17:52,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:52,358 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 10:17:52,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239155293] [2020-12-22 10:17:52,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:52,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:52,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178967623] [2020-12-22 10:17:52,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:52,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:52,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:52,361 INFO L87 Difference]: Start difference. First operand 7036 states and 10690 transitions. Second operand 3 states. [2020-12-22 10:17:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:53,053 INFO L93 Difference]: Finished difference Result 15904 states and 24164 transitions. [2020-12-22 10:17:53,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:53,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:17:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:53,076 INFO L225 Difference]: With dead ends: 15904 [2020-12-22 10:17:53,076 INFO L226 Difference]: Without dead ends: 11182 [2020-12-22 10:17:53,085 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 10:17:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11182 states. [2020-12-22 10:17:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11182 to 11180. [2020-12-22 10:17:53,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11180 states. [2020-12-22 10:17:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 16850 transitions. [2020-12-22 10:17:53,699 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 16850 transitions. Word has length 93 [2020-12-22 10:17:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:53,699 INFO L481 AbstractCegarLoop]: Abstraction has 11180 states and 16850 transitions. [2020-12-22 10:17:53,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 16850 transitions. [2020-12-22 10:17:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:17:53,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:53,701 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] [2020-12-22 10:17:53,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:17:53,702 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:17:53,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:53,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163659759] [2020-12-22 10:17:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:17:53,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163659759] [2020-12-22 10:17:53,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:53,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:53,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480267292] [2020-12-22 10:17:53,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:53,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:53,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:53,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:53,789 INFO L87 Difference]: Start difference. First operand 11180 states and 16850 transitions. Second operand 3 states. [2020-12-22 10:17:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:54,981 INFO L93 Difference]: Finished difference Result 27760 states and 41684 transitions. [2020-12-22 10:17:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:54,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:17:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:55,021 INFO L225 Difference]: With dead ends: 27760 [2020-12-22 10:17:55,021 INFO L226 Difference]: Without dead ends: 18894 [2020-12-22 10:17:55,035 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 10:17:55,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18894 states. [2020-12-22 10:17:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18894 to 18892. [2020-12-22 10:17:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18892 states. [2020-12-22 10:17:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 28114 transitions. [2020-12-22 10:17:56,450 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 28114 transitions. Word has length 93 [2020-12-22 10:17:56,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:56,450 INFO L481 AbstractCegarLoop]: Abstraction has 18892 states and 28114 transitions. [2020-12-22 10:17:56,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 28114 transitions. [2020-12-22 10:17:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:17:56,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:56,453 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] [2020-12-22 10:17:56,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:17:56,453 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:56,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:56,454 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:17:56,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:56,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696879849] [2020-12-22 10:17:56,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:56,555 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 10:17:56,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696879849] [2020-12-22 10:17:56,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:56,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:17:56,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158444083] [2020-12-22 10:17:56,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:17:56,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:56,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:17:56,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:17:56,558 INFO L87 Difference]: Start difference. First operand 18892 states and 28114 transitions. Second operand 6 states. [2020-12-22 10:17:57,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:57,943 INFO L93 Difference]: Finished difference Result 35470 states and 52755 transitions. [2020-12-22 10:17:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:17:57,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:17:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:57,972 INFO L225 Difference]: With dead ends: 35470 [2020-12-22 10:17:57,972 INFO L226 Difference]: Without dead ends: 18892 [2020-12-22 10:17:57,992 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 10:17:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2020-12-22 10:17:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18892. [2020-12-22 10:17:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18892 states. [2020-12-22 10:17:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 27858 transitions. [2020-12-22 10:17:59,217 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 27858 transitions. Word has length 94 [2020-12-22 10:17:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:59,217 INFO L481 AbstractCegarLoop]: Abstraction has 18892 states and 27858 transitions. [2020-12-22 10:17:59,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:17:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 27858 transitions. [2020-12-22 10:17:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:17:59,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:59,219 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] [2020-12-22 10:17:59,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:17:59,219 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:59,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:17:59,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:59,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640367954] [2020-12-22 10:17:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:59,321 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 10:17:59,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640367954] [2020-12-22 10:17:59,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:59,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:17:59,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982246388] [2020-12-22 10:17:59,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:17:59,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:59,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:17:59,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:17:59,324 INFO L87 Difference]: Start difference. First operand 18892 states and 27858 transitions. Second operand 6 states. [2020-12-22 10:18:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:00,350 INFO L93 Difference]: Finished difference Result 35470 states and 52243 transitions. [2020-12-22 10:18:00,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:18:00,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:18:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:00,376 INFO L225 Difference]: With dead ends: 35470 [2020-12-22 10:18:00,376 INFO L226 Difference]: Without dead ends: 18892 [2020-12-22 10:18:00,395 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 10:18:00,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2020-12-22 10:18:01,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18892. [2020-12-22 10:18:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18892 states. [2020-12-22 10:18:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 27666 transitions. [2020-12-22 10:18:01,534 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 27666 transitions. Word has length 94 [2020-12-22 10:18:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:01,534 INFO L481 AbstractCegarLoop]: Abstraction has 18892 states and 27666 transitions. [2020-12-22 10:18:01,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:18:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 27666 transitions. [2020-12-22 10:18:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:18:01,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:01,535 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] [2020-12-22 10:18:01,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:18:01,536 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:01,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:01,536 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:18:01,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:01,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106884054] [2020-12-22 10:18:01,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:01,648 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 10:18:01,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106884054] [2020-12-22 10:18:01,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:01,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:18:01,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744712402] [2020-12-22 10:18:01,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:18:01,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:01,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:18:01,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:18:01,650 INFO L87 Difference]: Start difference. First operand 18892 states and 27666 transitions. Second operand 8 states. [2020-12-22 10:18:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:03,907 INFO L93 Difference]: Finished difference Result 33135 states and 48060 transitions. [2020-12-22 10:18:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:18:03,908 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:18:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:03,955 INFO L225 Difference]: With dead ends: 33135 [2020-12-22 10:18:03,955 INFO L226 Difference]: Without dead ends: 33133 [2020-12-22 10:18:03,967 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 10:18:03,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33133 states. [2020-12-22 10:18:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33133 to 19660. [2020-12-22 10:18:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19660 states. [2020-12-22 10:18:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19660 states to 19660 states and 28370 transitions. [2020-12-22 10:18:05,722 INFO L78 Accepts]: Start accepts. Automaton has 19660 states and 28370 transitions. Word has length 94 [2020-12-22 10:18:05,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:05,722 INFO L481 AbstractCegarLoop]: Abstraction has 19660 states and 28370 transitions. [2020-12-22 10:18:05,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:18:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 19660 states and 28370 transitions. [2020-12-22 10:18:05,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:05,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:05,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:05,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:18:05,737 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:05,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:05,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1704205326, now seen corresponding path program 1 times [2020-12-22 10:18:05,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:05,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214239349] [2020-12-22 10:18:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:18:05,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214239349] [2020-12-22 10:18:05,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:05,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:05,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311535597] [2020-12-22 10:18:05,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:05,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:05,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:05,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:05,913 INFO L87 Difference]: Start difference. First operand 19660 states and 28370 transitions. Second operand 9 states. [2020-12-22 10:18:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:13,972 INFO L93 Difference]: Finished difference Result 144476 states and 207354 transitions. [2020-12-22 10:18:13,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:13,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:18:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:14,276 INFO L225 Difference]: With dead ends: 144476 [2020-12-22 10:18:14,276 INFO L226 Difference]: Without dead ends: 127130 [2020-12-22 10:18:14,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:18:14,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127130 states. [2020-12-22 10:18:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127130 to 37004. [2020-12-22 10:18:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37004 states. [2020-12-22 10:18:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37004 states to 37004 states and 53074 transitions. [2020-12-22 10:18:17,722 INFO L78 Accepts]: Start accepts. Automaton has 37004 states and 53074 transitions. Word has length 129 [2020-12-22 10:18:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:17,722 INFO L481 AbstractCegarLoop]: Abstraction has 37004 states and 53074 transitions. [2020-12-22 10:18:17,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 37004 states and 53074 transitions. [2020-12-22 10:18:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:17,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:17,738 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:17,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:18:17,739 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:17,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1343254354, now seen corresponding path program 1 times [2020-12-22 10:18:17,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:17,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773097581] [2020-12-22 10:18:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:18:17,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773097581] [2020-12-22 10:18:17,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:17,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:17,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540676802] [2020-12-22 10:18:17,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:17,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:17,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:17,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:17,907 INFO L87 Difference]: Start difference. First operand 37004 states and 53074 transitions. Second operand 9 states. [2020-12-22 10:18:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:28,044 INFO L93 Difference]: Finished difference Result 161820 states and 232058 transitions. [2020-12-22 10:18:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:28,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:18:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:28,221 INFO L225 Difference]: With dead ends: 161820 [2020-12-22 10:18:28,221 INFO L226 Difference]: Without dead ends: 144474 [2020-12-22 10:18:28,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:18:28,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144474 states. [2020-12-22 10:18:33,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144474 to 63052. [2020-12-22 10:18:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63052 states. [2020-12-22 10:18:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63052 states to 63052 states and 89970 transitions. [2020-12-22 10:18:33,835 INFO L78 Accepts]: Start accepts. Automaton has 63052 states and 89970 transitions. Word has length 129 [2020-12-22 10:18:33,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:33,836 INFO L481 AbstractCegarLoop]: Abstraction has 63052 states and 89970 transitions. [2020-12-22 10:18:33,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:33,836 INFO L276 IsEmpty]: Start isEmpty. Operand 63052 states and 89970 transitions. [2020-12-22 10:18:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:33,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:33,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:33,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:18:33,850 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash 126178628, now seen corresponding path program 1 times [2020-12-22 10:18:33,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:33,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139042426] [2020-12-22 10:18:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:18:34,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139042426] [2020-12-22 10:18:34,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:34,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:34,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239495753] [2020-12-22 10:18:34,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:34,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:34,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:34,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:34,035 INFO L87 Difference]: Start difference. First operand 63052 states and 89970 transitions. Second operand 9 states. [2020-12-22 10:18:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:45,720 INFO L93 Difference]: Finished difference Result 179164 states and 256762 transitions. [2020-12-22 10:18:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:45,721 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:18:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:45,900 INFO L225 Difference]: With dead ends: 179164 [2020-12-22 10:18:45,900 INFO L226 Difference]: Without dead ends: 161818 [2020-12-22 10:18:45,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:18:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161818 states. [2020-12-22 10:18:52,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161818 to 80396. [2020-12-22 10:18:52,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80396 states. [2020-12-22 10:18:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80396 states to 80396 states and 114674 transitions. [2020-12-22 10:18:53,070 INFO L78 Accepts]: Start accepts. Automaton has 80396 states and 114674 transitions. Word has length 129 [2020-12-22 10:18:53,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:53,070 INFO L481 AbstractCegarLoop]: Abstraction has 80396 states and 114674 transitions. [2020-12-22 10:18:53,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 80396 states and 114674 transitions. [2020-12-22 10:18:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:53,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:53,082 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:53,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:18:53,082 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:53,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1109280412, now seen corresponding path program 1 times [2020-12-22 10:18:53,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:53,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529748220] [2020-12-22 10:18:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:18:53,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529748220] [2020-12-22 10:18:53,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:53,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:53,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060101745] [2020-12-22 10:18:53,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:53,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:53,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:53,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:53,262 INFO L87 Difference]: Start difference. First operand 80396 states and 114674 transitions. Second operand 9 states. [2020-12-22 10:19:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:07,329 INFO L93 Difference]: Finished difference Result 196508 states and 281466 transitions. [2020-12-22 10:19:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:07,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:19:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:07,540 INFO L225 Difference]: With dead ends: 196508 [2020-12-22 10:19:07,541 INFO L226 Difference]: Without dead ends: 179162 [2020-12-22 10:19:07,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:19:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179162 states. [2020-12-22 10:19:16,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179162 to 97740. [2020-12-22 10:19:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97740 states. [2020-12-22 10:19:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97740 states to 97740 states and 139378 transitions. [2020-12-22 10:19:16,802 INFO L78 Accepts]: Start accepts. Automaton has 97740 states and 139378 transitions. Word has length 129 [2020-12-22 10:19:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:16,802 INFO L481 AbstractCegarLoop]: Abstraction has 97740 states and 139378 transitions. [2020-12-22 10:19:16,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:16,812 INFO L276 IsEmpty]: Start isEmpty. Operand 97740 states and 139378 transitions. [2020-12-22 10:19:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:19:16,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:16,840 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:16,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:19:16,840 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:16,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:16,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1764691332, now seen corresponding path program 1 times [2020-12-22 10:19:16,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:16,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632842523] [2020-12-22 10:19:16,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:19:17,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632842523] [2020-12-22 10:19:17,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:17,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:19:17,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400048564] [2020-12-22 10:19:17,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:19:17,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:17,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:19:17,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:19:17,041 INFO L87 Difference]: Start difference. First operand 97740 states and 139378 transitions. Second operand 9 states. [2020-12-22 10:19:34,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:34,062 INFO L93 Difference]: Finished difference Result 213852 states and 306170 transitions. [2020-12-22 10:19:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:34,062 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:19:34,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:34,300 INFO L225 Difference]: With dead ends: 213852 [2020-12-22 10:19:34,300 INFO L226 Difference]: Without dead ends: 196506 [2020-12-22 10:19:34,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:19:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196506 states. [2020-12-22 10:19:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196506 to 115084. [2020-12-22 10:19:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115084 states. [2020-12-22 10:19:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115084 states to 115084 states and 164082 transitions. [2020-12-22 10:19:45,598 INFO L78 Accepts]: Start accepts. Automaton has 115084 states and 164082 transitions. Word has length 129 [2020-12-22 10:19:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:45,598 INFO L481 AbstractCegarLoop]: Abstraction has 115084 states and 164082 transitions. [2020-12-22 10:19:45,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:45,598 INFO L276 IsEmpty]: Start isEmpty. Operand 115084 states and 164082 transitions. [2020-12-22 10:19:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:19:45,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:45,613 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:45,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:19:45,613 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1198870948, now seen corresponding path program 1 times [2020-12-22 10:19:45,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:45,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220804970] [2020-12-22 10:19:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:45,898 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-22 10:19:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:19:46,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220804970] [2020-12-22 10:19:46,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:46,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:19:46,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652245316] [2020-12-22 10:19:46,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:19:46,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:46,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:19:46,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:19:46,018 INFO L87 Difference]: Start difference. First operand 115084 states and 164082 transitions. Second operand 9 states. [2020-12-22 10:20:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:06,552 INFO L93 Difference]: Finished difference Result 231196 states and 330874 transitions. [2020-12-22 10:20:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:20:06,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:20:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:07,038 INFO L225 Difference]: With dead ends: 231196 [2020-12-22 10:20:07,039 INFO L226 Difference]: Without dead ends: 213850 [2020-12-22 10:20:07,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:20:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213850 states. [2020-12-22 10:20:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213850 to 132428. [2020-12-22 10:20:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132428 states. [2020-12-22 10:20:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132428 states to 132428 states and 188786 transitions. [2020-12-22 10:20:21,596 INFO L78 Accepts]: Start accepts. Automaton has 132428 states and 188786 transitions. Word has length 129 [2020-12-22 10:20:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:21,596 INFO L481 AbstractCegarLoop]: Abstraction has 132428 states and 188786 transitions. [2020-12-22 10:20:21,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:20:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 132428 states and 188786 transitions. [2020-12-22 10:20:21,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:20:21,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:21,619 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:21,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:20:21,620 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:21,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1388086724, now seen corresponding path program 1 times [2020-12-22 10:20:21,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:21,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668730768] [2020-12-22 10:20:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:20:21,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668730768] [2020-12-22 10:20:21,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:21,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:20:21,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414277748] [2020-12-22 10:20:21,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:20:21,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:21,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:20:21,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:20:21,875 INFO L87 Difference]: Start difference. First operand 132428 states and 188786 transitions. Second operand 9 states. [2020-12-22 10:20:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:45,746 INFO L93 Difference]: Finished difference Result 237916 states and 340602 transitions. [2020-12-22 10:20:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:20:45,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:20:45,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:46,223 INFO L225 Difference]: With dead ends: 237916 [2020-12-22 10:20:46,224 INFO L226 Difference]: Without dead ends: 225882 [2020-12-22 10:20:46,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:20:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225882 states.