/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:24:18,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:24:18,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:24:18,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:24:18,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:24:18,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:24:18,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:24:18,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:24:18,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:24:18,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:24:18,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:24:18,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:24:18,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:24:18,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:24:18,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:24:18,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:24:18,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:24:18,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:24:18,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:24:18,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:24:18,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:24:18,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:24:18,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:24:18,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:24:18,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:24:18,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:24:18,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:24:18,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:24:18,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:24:18,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:24:18,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:24:18,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:24:18,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:24:18,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:24:18,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:24:18,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:24:18,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:24:18,213 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:24:18,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:24:18,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:24:18,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:24:18,217 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:24:18,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:24:18,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:24:18,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:24:18,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:24:18,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:24:18,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:24:18,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:24:18,220 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:24:18,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:24:18,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:24:18,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:24:18,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:24:18,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:24:18,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:24:18,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:24:18,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:24:18,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:24:18,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:24:18,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:24:18,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:24:18,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:24:18,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:24:18,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:24:18,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:24:18,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:24:18,673 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:24:18,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 10:24:18,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a34a1ef74/ce5a926d56704249b3f9cc0d0f5425c9/FLAG630d7fc5e [2020-12-22 10:24:19,808 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:24:19,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 10:24:19,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a34a1ef74/ce5a926d56704249b3f9cc0d0f5425c9/FLAG630d7fc5e [2020-12-22 10:24:20,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a34a1ef74/ce5a926d56704249b3f9cc0d0f5425c9 [2020-12-22 10:24:20,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:24:20,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:24:20,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:24:20,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:24:20,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:24:20,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:24:20" (1/1) ... [2020-12-22 10:24:20,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee48527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:20, skipping insertion in model container [2020-12-22 10:24:20,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:24:20" (1/1) ... [2020-12-22 10:24:20,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:24:20,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:24:20,951 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label04.c[26875,26888] [2020-12-22 10:24:21,072 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label04.c[33693,33706] [2020-12-22 10:24:21,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:24:21,959 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:24:22,060 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label04.c[26875,26888] [2020-12-22 10:24:22,076 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label04.c[33693,33706] [2020-12-22 10:24:22,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:24:22,803 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:24:22,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:22 WrapperNode [2020-12-22 10:24:22,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:24:22,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:24:22,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:24:22,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:24:22,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:22" (1/1) ... [2020-12-22 10:24:22,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:22" (1/1) ... [2020-12-22 10:24:23,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:24:23,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:24:23,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:24:23,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:24:23,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:22" (1/1) ... [2020-12-22 10:24:23,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:22" (1/1) ... [2020-12-22 10:24:23,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:22" (1/1) ... [2020-12-22 10:24:23,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:22" (1/1) ... [2020-12-22 10:24:23,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:22" (1/1) ... [2020-12-22 10:24:23,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:22" (1/1) ... [2020-12-22 10:24:23,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:22" (1/1) ... [2020-12-22 10:24:23,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:24:23,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:24:23,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:24:23,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:24:23,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:22" (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 10:24:24,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:24:24,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:24:24,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:24:24,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:24:29,612 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:24:29,613 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:24:29,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:24:29 BoogieIcfgContainer [2020-12-22 10:24:29,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:24:29,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:24:29,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:24:29,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:24:29,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:24:20" (1/3) ... [2020-12-22 10:24:29,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73497d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:24:29, skipping insertion in model container [2020-12-22 10:24:29,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:22" (2/3) ... [2020-12-22 10:24:29,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73497d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:24:29, skipping insertion in model container [2020-12-22 10:24:29,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:24:29" (3/3) ... [2020-12-22 10:24:29,625 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 10:24:29,632 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:24:29,638 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:24:29,658 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:24:29,695 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:24:29,695 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:24:29,695 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:24:29,696 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:24:29,696 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:24:29,696 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:24:29,696 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:24:29,696 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:24:29,731 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states. [2020-12-22 10:24:29,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:24:29,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:29,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:29,745 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:29,751 INFO L82 PathProgramCache]: Analyzing trace with hash -805214309, now seen corresponding path program 1 times [2020-12-22 10:24:29,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:29,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786913667] [2020-12-22 10:24:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:30,185 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 10:24:30,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786913667] [2020-12-22 10:24:30,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:30,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:24:30,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497985330] [2020-12-22 10:24:30,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:24:30,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:30,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:24:30,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:24:30,218 INFO L87 Difference]: Start difference. First operand 964 states. Second operand 2 states. [2020-12-22 10:24:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:30,328 INFO L93 Difference]: Finished difference Result 1859 states and 3514 transitions. [2020-12-22 10:24:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:24:30,330 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:24:30,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:30,383 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:24:30,384 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:24:30,395 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 10:24:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:24:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:24:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:24:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1690 transitions. [2020-12-22 10:24:30,526 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1690 transitions. Word has length 46 [2020-12-22 10:24:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:30,527 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1690 transitions. [2020-12-22 10:24:30,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:24:30,527 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1690 transitions. [2020-12-22 10:24:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:24:30,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:30,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:30,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:24:30,538 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:30,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:30,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2020-12-22 10:24:30,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:30,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606824603] [2020-12-22 10:24:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:30,715 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 10:24:30,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606824603] [2020-12-22 10:24:30,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:30,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:24:30,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026114467] [2020-12-22 10:24:30,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:24:30,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:30,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:24:30,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:24:30,721 INFO L87 Difference]: Start difference. First operand 898 states and 1690 transitions. Second operand 5 states. [2020-12-22 10:24:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:30,897 INFO L93 Difference]: Finished difference Result 979 states and 1817 transitions. [2020-12-22 10:24:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:24:30,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:24:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:30,903 INFO L225 Difference]: With dead ends: 979 [2020-12-22 10:24:30,903 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:24:30,905 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 10:24:30,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:24:30,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:24:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:24:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1629 transitions. [2020-12-22 10:24:30,928 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1629 transitions. Word has length 46 [2020-12-22 10:24:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:30,929 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1629 transitions. [2020-12-22 10:24:30,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:24:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1629 transitions. [2020-12-22 10:24:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 10:24:30,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:30,933 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] [2020-12-22 10:24:30,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:24:30,934 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1268868254, now seen corresponding path program 1 times [2020-12-22 10:24:30,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:30,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061615546] [2020-12-22 10:24:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:31,141 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 10:24:31,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061615546] [2020-12-22 10:24:31,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:31,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:24:31,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970621702] [2020-12-22 10:24:31,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:31,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:31,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:31,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:31,157 INFO L87 Difference]: Start difference. First operand 898 states and 1629 transitions. Second operand 3 states. [2020-12-22 10:24:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:37,362 INFO L93 Difference]: Finished difference Result 2402 states and 4502 transitions. [2020-12-22 10:24:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:37,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 10:24:37,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:37,377 INFO L225 Difference]: With dead ends: 2402 [2020-12-22 10:24:37,377 INFO L226 Difference]: Without dead ends: 1649 [2020-12-22 10:24:37,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-12-22 10:24:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2020-12-22 10:24:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-12-22 10:24:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2608 transitions. [2020-12-22 10:24:37,427 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2608 transitions. Word has length 61 [2020-12-22 10:24:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:37,428 INFO L481 AbstractCegarLoop]: Abstraction has 1649 states and 2608 transitions. [2020-12-22 10:24:37,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:37,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2608 transitions. [2020-12-22 10:24:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:37,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:37,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:37,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:24:37,431 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:37,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:37,431 INFO L82 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2020-12-22 10:24:37,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:37,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052032795] [2020-12-22 10:24:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:37,581 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 10:24:37,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052032795] [2020-12-22 10:24:37,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:37,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:37,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982656674] [2020-12-22 10:24:37,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:37,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:37,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:37,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:37,586 INFO L87 Difference]: Start difference. First operand 1649 states and 2608 transitions. Second operand 3 states. [2020-12-22 10:24:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:37,641 INFO L93 Difference]: Finished difference Result 1797 states and 2844 transitions. [2020-12-22 10:24:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:37,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:37,654 INFO L225 Difference]: With dead ends: 1797 [2020-12-22 10:24:37,655 INFO L226 Difference]: Without dead ends: 1720 [2020-12-22 10:24:37,656 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 10:24:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2020-12-22 10:24:37,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1718. [2020-12-22 10:24:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1718 states. [2020-12-22 10:24:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2719 transitions. [2020-12-22 10:24:37,703 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2719 transitions. Word has length 106 [2020-12-22 10:24:37,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:37,704 INFO L481 AbstractCegarLoop]: Abstraction has 1718 states and 2719 transitions. [2020-12-22 10:24:37,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2719 transitions. [2020-12-22 10:24:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:37,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:37,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:37,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:24:37,707 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:37,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:37,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2020-12-22 10:24:37,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:37,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55789875] [2020-12-22 10:24:37,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:37,893 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 10:24:37,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55789875] [2020-12-22 10:24:37,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:37,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:37,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602701129] [2020-12-22 10:24:37,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:37,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:37,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:37,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:37,898 INFO L87 Difference]: Start difference. First operand 1718 states and 2719 transitions. Second operand 3 states. [2020-12-22 10:24:37,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:37,957 INFO L93 Difference]: Finished difference Result 1998 states and 3167 transitions. [2020-12-22 10:24:37,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:37,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:37,971 INFO L225 Difference]: With dead ends: 1998 [2020-12-22 10:24:37,972 INFO L226 Difference]: Without dead ends: 1852 [2020-12-22 10:24:37,973 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 10:24:37,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2020-12-22 10:24:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1850. [2020-12-22 10:24:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1850 states. [2020-12-22 10:24:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2930 transitions. [2020-12-22 10:24:38,046 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2930 transitions. Word has length 106 [2020-12-22 10:24:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:38,047 INFO L481 AbstractCegarLoop]: Abstraction has 1850 states and 2930 transitions. [2020-12-22 10:24:38,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2930 transitions. [2020-12-22 10:24:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:38,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:38,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:38,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:24:38,057 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:38,057 INFO L82 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2020-12-22 10:24:38,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:38,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983271128] [2020-12-22 10:24:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:38,246 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 10:24:38,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983271128] [2020-12-22 10:24:38,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:38,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:38,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898053881] [2020-12-22 10:24:38,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:38,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:38,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:38,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:38,249 INFO L87 Difference]: Start difference. First operand 1850 states and 2930 transitions. Second operand 3 states. [2020-12-22 10:24:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:38,308 INFO L93 Difference]: Finished difference Result 2382 states and 3780 transitions. [2020-12-22 10:24:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:38,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:38,324 INFO L225 Difference]: With dead ends: 2382 [2020-12-22 10:24:38,324 INFO L226 Difference]: Without dead ends: 2104 [2020-12-22 10:24:38,326 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 10:24:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2020-12-22 10:24:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2102. [2020-12-22 10:24:38,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2102 states. [2020-12-22 10:24:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 3330 transitions. [2020-12-22 10:24:38,401 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 3330 transitions. Word has length 106 [2020-12-22 10:24:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:38,402 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 3330 transitions. [2020-12-22 10:24:38,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:38,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 3330 transitions. [2020-12-22 10:24:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:38,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:38,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:38,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:24:38,405 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:38,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:38,406 INFO L82 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2020-12-22 10:24:38,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:38,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609127841] [2020-12-22 10:24:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:38,526 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 10:24:38,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609127841] [2020-12-22 10:24:38,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:38,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:38,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172374108] [2020-12-22 10:24:38,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:38,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:38,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:38,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:38,530 INFO L87 Difference]: Start difference. First operand 2102 states and 3330 transitions. Second operand 3 states. [2020-12-22 10:24:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:38,622 INFO L93 Difference]: Finished difference Result 3114 states and 4940 transitions. [2020-12-22 10:24:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:38,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:38,641 INFO L225 Difference]: With dead ends: 3114 [2020-12-22 10:24:38,641 INFO L226 Difference]: Without dead ends: 2584 [2020-12-22 10:24:38,643 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 10:24:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2020-12-22 10:24:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2582. [2020-12-22 10:24:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2582 states. [2020-12-22 10:24:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 4086 transitions. [2020-12-22 10:24:38,756 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 4086 transitions. Word has length 106 [2020-12-22 10:24:38,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:38,758 INFO L481 AbstractCegarLoop]: Abstraction has 2582 states and 4086 transitions. [2020-12-22 10:24:38,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 4086 transitions. [2020-12-22 10:24:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:38,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:38,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:38,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:24:38,762 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:38,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:38,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2020-12-22 10:24:38,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:38,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820744521] [2020-12-22 10:24:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:38,893 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 10:24:38,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820744521] [2020-12-22 10:24:38,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:38,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:38,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985649044] [2020-12-22 10:24:38,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:38,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:38,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:38,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:38,898 INFO L87 Difference]: Start difference. First operand 2582 states and 4086 transitions. Second operand 3 states. [2020-12-22 10:24:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:38,991 INFO L93 Difference]: Finished difference Result 4506 states and 7128 transitions. [2020-12-22 10:24:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:38,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:39,010 INFO L225 Difference]: With dead ends: 4506 [2020-12-22 10:24:39,011 INFO L226 Difference]: Without dead ends: 3496 [2020-12-22 10:24:39,014 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 10:24:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2020-12-22 10:24:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3494. [2020-12-22 10:24:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3494 states. [2020-12-22 10:24:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 5510 transitions. [2020-12-22 10:24:39,150 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 5510 transitions. Word has length 106 [2020-12-22 10:24:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:39,151 INFO L481 AbstractCegarLoop]: Abstraction has 3494 states and 5510 transitions. [2020-12-22 10:24:39,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 5510 transitions. [2020-12-22 10:24:39,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:39,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:39,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:39,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:24:39,153 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:39,154 INFO L82 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2020-12-22 10:24:39,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:39,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565916017] [2020-12-22 10:24:39,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:39,279 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 10:24:39,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565916017] [2020-12-22 10:24:39,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:39,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:39,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833943024] [2020-12-22 10:24:39,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:39,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:39,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:39,283 INFO L87 Difference]: Start difference. First operand 3494 states and 5510 transitions. Second operand 3 states. [2020-12-22 10:24:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:39,440 INFO L93 Difference]: Finished difference Result 7146 states and 11240 transitions. [2020-12-22 10:24:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:39,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:39,469 INFO L225 Difference]: With dead ends: 7146 [2020-12-22 10:24:39,469 INFO L226 Difference]: Without dead ends: 5224 [2020-12-22 10:24:39,476 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 10:24:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2020-12-22 10:24:39,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 5222. [2020-12-22 10:24:39,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5222 states. [2020-12-22 10:24:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 8182 transitions. [2020-12-22 10:24:39,688 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 8182 transitions. Word has length 106 [2020-12-22 10:24:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:39,689 INFO L481 AbstractCegarLoop]: Abstraction has 5222 states and 8182 transitions. [2020-12-22 10:24:39,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 8182 transitions. [2020-12-22 10:24:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:39,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:39,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:39,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:24:39,691 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:39,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:39,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2020-12-22 10:24:39,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:39,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140778233] [2020-12-22 10:24:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:39,788 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 10:24:39,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140778233] [2020-12-22 10:24:39,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:39,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:39,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064685364] [2020-12-22 10:24:39,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:39,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:39,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:39,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:39,793 INFO L87 Difference]: Start difference. First operand 5222 states and 8182 transitions. Second operand 3 states. [2020-12-22 10:24:40,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:40,094 INFO L93 Difference]: Finished difference Result 12138 states and 18936 transitions. [2020-12-22 10:24:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:40,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:40,156 INFO L225 Difference]: With dead ends: 12138 [2020-12-22 10:24:40,157 INFO L226 Difference]: Without dead ends: 8488 [2020-12-22 10:24:40,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8488 states. [2020-12-22 10:24:40,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8488 to 8486. [2020-12-22 10:24:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8486 states. [2020-12-22 10:24:40,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8486 states to 8486 states and 13174 transitions. [2020-12-22 10:24:40,577 INFO L78 Accepts]: Start accepts. Automaton has 8486 states and 13174 transitions. Word has length 106 [2020-12-22 10:24:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:40,577 INFO L481 AbstractCegarLoop]: Abstraction has 8486 states and 13174 transitions. [2020-12-22 10:24:40,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 8486 states and 13174 transitions. [2020-12-22 10:24:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:40,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:40,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:40,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:24:40,580 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:40,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2020-12-22 10:24:40,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:40,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117823226] [2020-12-22 10:24:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:40,926 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 10:24:40,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117823226] [2020-12-22 10:24:40,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:40,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:40,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38823819] [2020-12-22 10:24:40,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:40,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:40,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:40,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:40,931 INFO L87 Difference]: Start difference. First operand 8486 states and 13174 transitions. Second operand 10 states. [2020-12-22 10:24:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:46,574 INFO L93 Difference]: Finished difference Result 119110 states and 184198 transitions. [2020-12-22 10:24:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:24:46,575 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:24:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:46,906 INFO L225 Difference]: With dead ends: 119110 [2020-12-22 10:24:46,907 INFO L226 Difference]: Without dead ends: 112196 [2020-12-22 10:24:46,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:24:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112196 states. [2020-12-22 10:24:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112196 to 15398. [2020-12-22 10:24:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15398 states. [2020-12-22 10:24:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15398 states to 15398 states and 23606 transitions. [2020-12-22 10:24:49,546 INFO L78 Accepts]: Start accepts. Automaton has 15398 states and 23606 transitions. Word has length 106 [2020-12-22 10:24:49,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:49,547 INFO L481 AbstractCegarLoop]: Abstraction has 15398 states and 23606 transitions. [2020-12-22 10:24:49,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 15398 states and 23606 transitions. [2020-12-22 10:24:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:24:49,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:49,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:49,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:24:49,550 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:49,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2020-12-22 10:24:49,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:49,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199332954] [2020-12-22 10:24:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:49,723 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 10:24:49,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199332954] [2020-12-22 10:24:49,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:49,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:49,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689001140] [2020-12-22 10:24:49,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:49,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:49,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:49,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:49,726 INFO L87 Difference]: Start difference. First operand 15398 states and 23606 transitions. Second operand 3 states. [2020-12-22 10:24:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:51,430 INFO L93 Difference]: Finished difference Result 41642 states and 63416 transitions. [2020-12-22 10:24:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:51,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:24:51,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:51,518 INFO L225 Difference]: With dead ends: 41642 [2020-12-22 10:24:51,519 INFO L226 Difference]: Without dead ends: 27816 [2020-12-22 10:24:51,546 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 10:24:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27816 states. [2020-12-22 10:24:53,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27816 to 27558. [2020-12-22 10:24:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27558 states. [2020-12-22 10:24:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27558 states to 27558 states and 41398 transitions. [2020-12-22 10:24:53,729 INFO L78 Accepts]: Start accepts. Automaton has 27558 states and 41398 transitions. Word has length 108 [2020-12-22 10:24:53,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:53,734 INFO L481 AbstractCegarLoop]: Abstraction has 27558 states and 41398 transitions. [2020-12-22 10:24:53,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:53,734 INFO L276 IsEmpty]: Start isEmpty. Operand 27558 states and 41398 transitions. [2020-12-22 10:24:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:24:53,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:53,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:53,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:24:53,737 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:53,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2020-12-22 10:24:53,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:53,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070521382] [2020-12-22 10:24:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:54,181 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 10:24:54,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070521382] [2020-12-22 10:24:54,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:54,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:54,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025712904] [2020-12-22 10:24:54,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:54,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:54,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:54,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:54,189 INFO L87 Difference]: Start difference. First operand 27558 states and 41398 transitions. Second operand 10 states. [2020-12-22 10:24:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:56,222 INFO L93 Difference]: Finished difference Result 53546 states and 80312 transitions. [2020-12-22 10:24:56,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:56,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:24:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:56,283 INFO L225 Difference]: With dead ends: 53546 [2020-12-22 10:24:56,283 INFO L226 Difference]: Without dead ends: 27560 [2020-12-22 10:24:56,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:24:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27560 states. [2020-12-22 10:24:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27560 to 27558. [2020-12-22 10:24:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27558 states. [2020-12-22 10:24:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27558 states to 27558 states and 41142 transitions. [2020-12-22 10:24:58,056 INFO L78 Accepts]: Start accepts. Automaton has 27558 states and 41142 transitions. Word has length 108 [2020-12-22 10:24:58,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:58,056 INFO L481 AbstractCegarLoop]: Abstraction has 27558 states and 41142 transitions. [2020-12-22 10:24:58,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 27558 states and 41142 transitions. [2020-12-22 10:24:58,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:24:58,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:58,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:58,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:24:58,059 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:58,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:58,059 INFO L82 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2020-12-22 10:24:58,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:58,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145048362] [2020-12-22 10:24:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:58,189 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 10:24:58,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145048362] [2020-12-22 10:24:58,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:58,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:24:58,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009463877] [2020-12-22 10:24:58,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:24:58,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:58,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:24:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:24:58,192 INFO L87 Difference]: Start difference. First operand 27558 states and 41142 transitions. Second operand 6 states. [2020-12-22 10:25:00,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:00,180 INFO L93 Difference]: Finished difference Result 53544 states and 79799 transitions. [2020-12-22 10:25:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:25:00,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-12-22 10:25:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:00,235 INFO L225 Difference]: With dead ends: 53544 [2020-12-22 10:25:00,235 INFO L226 Difference]: Without dead ends: 27558 [2020-12-22 10:25:00,258 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 10:25:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27558 states. [2020-12-22 10:25:02,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27558 to 27558. [2020-12-22 10:25:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27558 states. [2020-12-22 10:25:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27558 states to 27558 states and 40886 transitions. [2020-12-22 10:25:02,243 INFO L78 Accepts]: Start accepts. Automaton has 27558 states and 40886 transitions. Word has length 109 [2020-12-22 10:25:02,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:02,244 INFO L481 AbstractCegarLoop]: Abstraction has 27558 states and 40886 transitions. [2020-12-22 10:25:02,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:25:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 27558 states and 40886 transitions. [2020-12-22 10:25:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:25:02,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:02,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:25:02,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:25:02,246 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:02,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:02,246 INFO L82 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2020-12-22 10:25:02,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:02,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587196531] [2020-12-22 10:25:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:25:02,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587196531] [2020-12-22 10:25:02,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:02,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:25:02,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51180349] [2020-12-22 10:25:02,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:25:02,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:02,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:25:02,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:25:02,410 INFO L87 Difference]: Start difference. First operand 27558 states and 40886 transitions. Second operand 8 states. [2020-12-22 10:25:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:05,536 INFO L93 Difference]: Finished difference Result 46928 states and 69099 transitions. [2020-12-22 10:25:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:05,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:25:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:05,603 INFO L225 Difference]: With dead ends: 46928 [2020-12-22 10:25:05,603 INFO L226 Difference]: Without dead ends: 46926 [2020-12-22 10:25:05,614 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 10:25:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46926 states. [2020-12-22 10:25:07,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46926 to 28326. [2020-12-22 10:25:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28326 states. [2020-12-22 10:25:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28326 states to 28326 states and 41526 transitions. [2020-12-22 10:25:07,644 INFO L78 Accepts]: Start accepts. Automaton has 28326 states and 41526 transitions. Word has length 109 [2020-12-22 10:25:07,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:07,644 INFO L481 AbstractCegarLoop]: Abstraction has 28326 states and 41526 transitions. [2020-12-22 10:25:07,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:25:07,645 INFO L276 IsEmpty]: Start isEmpty. Operand 28326 states and 41526 transitions. [2020-12-22 10:25:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 10:25:07,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:07,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:25:07,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:25:07,648 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:07,649 INFO L82 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2020-12-22 10:25:07,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:07,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860690527] [2020-12-22 10:25:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:25:07,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860690527] [2020-12-22 10:25:07,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:07,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:25:07,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915273683] [2020-12-22 10:25:07,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:25:07,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:07,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:25:07,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:25:07,764 INFO L87 Difference]: Start difference. First operand 28326 states and 41526 transitions. Second operand 3 states. [2020-12-22 10:25:10,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:10,271 INFO L93 Difference]: Finished difference Result 55469 states and 81468 transitions. [2020-12-22 10:25:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:25:10,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 10:25:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:10,328 INFO L225 Difference]: With dead ends: 55469 [2020-12-22 10:25:10,328 INFO L226 Difference]: Without dead ends: 40874 [2020-12-22 10:25:10,346 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 10:25:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40874 states. [2020-12-22 10:25:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40874 to 40872. [2020-12-22 10:25:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40872 states. [2020-12-22 10:25:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40872 states to 40872 states and 59576 transitions. [2020-12-22 10:25:13,397 INFO L78 Accepts]: Start accepts. Automaton has 40872 states and 59576 transitions. Word has length 110 [2020-12-22 10:25:13,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:13,397 INFO L481 AbstractCegarLoop]: Abstraction has 40872 states and 59576 transitions. [2020-12-22 10:25:13,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:25:13,397 INFO L276 IsEmpty]: Start isEmpty. Operand 40872 states and 59576 transitions. [2020-12-22 10:25:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 10:25:13,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:13,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:25:13,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:25:13,404 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:13,404 INFO L82 PathProgramCache]: Analyzing trace with hash 358929387, now seen corresponding path program 1 times [2020-12-22 10:25:13,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:13,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225485003] [2020-12-22 10:25:13,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:25:13,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225485003] [2020-12-22 10:25:13,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:13,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:25:13,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689935426] [2020-12-22 10:25:13,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:25:13,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:13,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:25:13,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:25:13,494 INFO L87 Difference]: Start difference. First operand 40872 states and 59576 transitions. Second operand 3 states. [2020-12-22 10:25:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:22,074 INFO L93 Difference]: Finished difference Result 43880 states and 64408 transitions. [2020-12-22 10:25:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:25:22,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 10:25:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:22,124 INFO L225 Difference]: With dead ends: 43880 [2020-12-22 10:25:22,125 INFO L226 Difference]: Without dead ends: 42376 [2020-12-22 10:25:22,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:25:22,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2020-12-22 10:25:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 42374. [2020-12-22 10:25:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42374 states. [2020-12-22 10:25:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42374 states to 42374 states and 61547 transitions. [2020-12-22 10:25:24,703 INFO L78 Accepts]: Start accepts. Automaton has 42374 states and 61547 transitions. Word has length 136 [2020-12-22 10:25:24,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:24,703 INFO L481 AbstractCegarLoop]: Abstraction has 42374 states and 61547 transitions. [2020-12-22 10:25:24,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:25:24,703 INFO L276 IsEmpty]: Start isEmpty. Operand 42374 states and 61547 transitions. [2020-12-22 10:25:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:25:24,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:24,728 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:25:24,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:25:24,729 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:24,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:24,730 INFO L82 PathProgramCache]: Analyzing trace with hash 45078639, now seen corresponding path program 1 times [2020-12-22 10:25:24,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:24,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766227814] [2020-12-22 10:25:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:25:24,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766227814] [2020-12-22 10:25:24,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:24,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:24,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026427104] [2020-12-22 10:25:24,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:24,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:24,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:24,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:24,957 INFO L87 Difference]: Start difference. First operand 42374 states and 61547 transitions. Second operand 10 states. [2020-12-22 10:25:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:43,664 INFO L93 Difference]: Finished difference Result 364312 states and 528884 transitions. [2020-12-22 10:25:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:43,665 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:25:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:44,385 INFO L225 Difference]: With dead ends: 364312 [2020-12-22 10:25:44,385 INFO L226 Difference]: Without dead ends: 325014 [2020-12-22 10:25:44,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:25:44,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325014 states. [2020-12-22 10:25:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325014 to 81670. [2020-12-22 10:25:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81670 states. [2020-12-22 10:25:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81670 states to 81670 states and 118251 transitions. [2020-12-22 10:25:52,084 INFO L78 Accepts]: Start accepts. Automaton has 81670 states and 118251 transitions. Word has length 148 [2020-12-22 10:25:52,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:52,085 INFO L481 AbstractCegarLoop]: Abstraction has 81670 states and 118251 transitions. [2020-12-22 10:25:52,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:25:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 81670 states and 118251 transitions. [2020-12-22 10:25:52,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:25:52,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:52,115 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:25:52,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:25:52,115 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:52,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1723704177, now seen corresponding path program 1 times [2020-12-22 10:25:52,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:52,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622287424] [2020-12-22 10:25:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:25:52,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622287424] [2020-12-22 10:25:52,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:52,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:52,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939765937] [2020-12-22 10:25:52,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:52,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:52,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:52,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:52,364 INFO L87 Difference]: Start difference. First operand 81670 states and 118251 transitions. Second operand 10 states. [2020-12-22 10:26:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:16,276 INFO L93 Difference]: Finished difference Result 403608 states and 585588 transitions. [2020-12-22 10:26:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:16,277 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:26:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:17,059 INFO L225 Difference]: With dead ends: 403608 [2020-12-22 10:26:17,059 INFO L226 Difference]: Without dead ends: 364310 [2020-12-22 10:26:17,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:26:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364310 states. [2020-12-22 10:26:29,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364310 to 140678. [2020-12-22 10:26:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140678 states. [2020-12-22 10:26:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140678 states to 140678 states and 202987 transitions. [2020-12-22 10:26:29,709 INFO L78 Accepts]: Start accepts. Automaton has 140678 states and 202987 transitions. Word has length 148 [2020-12-22 10:26:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:29,710 INFO L481 AbstractCegarLoop]: Abstraction has 140678 states and 202987 transitions. [2020-12-22 10:26:29,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:29,710 INFO L276 IsEmpty]: Start isEmpty. Operand 140678 states and 202987 transitions. [2020-12-22 10:26:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:26:30,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:30,002 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:30,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:26:30,003 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:30,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:30,004 INFO L82 PathProgramCache]: Analyzing trace with hash -592064337, now seen corresponding path program 1 times [2020-12-22 10:26:30,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:30,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825177071] [2020-12-22 10:26:30,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:26:30,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825177071] [2020-12-22 10:26:30,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:30,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:30,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692915718] [2020-12-22 10:26:30,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:30,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:30,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:30,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:30,255 INFO L87 Difference]: Start difference. First operand 140678 states and 202987 transitions. Second operand 10 states. [2020-12-22 10:26:59,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:59,325 INFO L93 Difference]: Finished difference Result 442904 states and 642292 transitions. [2020-12-22 10:26:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:59,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:26:59,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:00,151 INFO L225 Difference]: With dead ends: 442904 [2020-12-22 10:27:00,152 INFO L226 Difference]: Without dead ends: 403606 [2020-12-22 10:27:00,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:27:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403606 states. [2020-12-22 10:27:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403606 to 179974. [2020-12-22 10:27:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179974 states. [2020-12-22 10:27:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179974 states to 179974 states and 259691 transitions. [2020-12-22 10:27:17,070 INFO L78 Accepts]: Start accepts. Automaton has 179974 states and 259691 transitions. Word has length 148 [2020-12-22 10:27:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:17,071 INFO L481 AbstractCegarLoop]: Abstraction has 179974 states and 259691 transitions. [2020-12-22 10:27:17,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 179974 states and 259691 transitions. [2020-12-22 10:27:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:17,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:17,102 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:17,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:27:17,102 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:17,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1827523377, now seen corresponding path program 1 times [2020-12-22 10:27:17,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:17,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981248245] [2020-12-22 10:27:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:17,505 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2020-12-22 10:27:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:27:17,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981248245] [2020-12-22 10:27:17,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:17,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:17,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341373329] [2020-12-22 10:27:17,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:17,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:17,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:17,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:17,684 INFO L87 Difference]: Start difference. First operand 179974 states and 259691 transitions. Second operand 10 states.