/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:12:44,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:12:44,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:12:44,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:12:44,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:12:44,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:12:44,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:12:44,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:12:44,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:12:44,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:12:44,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:12:44,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:12:44,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:12:44,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:12:44,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:12:44,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:12:44,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:12:44,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:12:44,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:12:44,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:12:44,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:12:44,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:12:44,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:12:44,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:12:44,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:12:44,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:12:44,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:12:44,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:12:44,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:12:44,387 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:12:44,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:12:44,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:12:44,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:12:44,389 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:12:44,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:12:44,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:12:44,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:12:44,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:12:44,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:12:44,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:12:44,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:12:44,391 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:12:44,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:12:44,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:12:44,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:12:44,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:12:44,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:12:44,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:12:44,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:12:44,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:12:44,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:12:44,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:12:44,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:12:44,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:12:44,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:12:44,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:12:44,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:12:44,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:12:44,866 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:12:44,867 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:12:44,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label02.c [2020-12-22 10:12:44,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca31dfa6e/e29cd346552b48f692dacbe18bcb8e99/FLAG139b4a6cd [2020-12-22 10:12:46,048 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:12:46,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label02.c [2020-12-22 10:12:46,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca31dfa6e/e29cd346552b48f692dacbe18bcb8e99/FLAG139b4a6cd [2020-12-22 10:12:46,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca31dfa6e/e29cd346552b48f692dacbe18bcb8e99 [2020-12-22 10:12:46,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:12:46,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:12:46,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:12:46,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:12:46,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:12:46,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:12:46" (1/1) ... [2020-12-22 10:12:46,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@775896b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:46, skipping insertion in model container [2020-12-22 10:12:46,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:12:46" (1/1) ... [2020-12-22 10:12:46,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:12:46,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:12:47,052 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label02.c[20544,20557] [2020-12-22 10:12:47,131 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label02.c[27591,27604] [2020-12-22 10:12:48,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:12:48,322 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:12:48,410 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label02.c[20544,20557] [2020-12-22 10:12:48,463 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label02.c[27591,27604] [2020-12-22 10:12:49,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:12:49,186 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:12:49,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:49 WrapperNode [2020-12-22 10:12:49,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:12:49,189 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:12:49,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:12:49,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:12:49,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:49" (1/1) ... [2020-12-22 10:12:49,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:49" (1/1) ... [2020-12-22 10:12:49,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:12:49,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:12:49,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:12:49,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:12:49,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:49" (1/1) ... [2020-12-22 10:12:49,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:49" (1/1) ... [2020-12-22 10:12:49,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:49" (1/1) ... [2020-12-22 10:12:49,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:49" (1/1) ... [2020-12-22 10:12:50,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:49" (1/1) ... [2020-12-22 10:12:50,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:49" (1/1) ... [2020-12-22 10:12:50,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:49" (1/1) ... [2020-12-22 10:12:50,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:12:50,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:12:50,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:12:50,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:12:50,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:12:50,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:12:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:12:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:12:50,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:12:57,627 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:12:57,627 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:12:57,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:12:57 BoogieIcfgContainer [2020-12-22 10:12:57,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:12:57,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:12:57,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:12:57,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:12:57,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:12:46" (1/3) ... [2020-12-22 10:12:57,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c373236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:12:57, skipping insertion in model container [2020-12-22 10:12:57,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:49" (2/3) ... [2020-12-22 10:12:57,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c373236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:12:57, skipping insertion in model container [2020-12-22 10:12:57,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:12:57" (3/3) ... [2020-12-22 10:12:57,647 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label02.c [2020-12-22 10:12:57,654 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:12:57,660 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:12:57,679 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:12:57,714 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:12:57,715 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:12:57,715 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:12:57,715 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:12:57,715 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:12:57,715 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:12:57,715 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:12:57,716 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:12:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states. [2020-12-22 10:12:57,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:12:57,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:57,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:57,777 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:57,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:57,783 INFO L82 PathProgramCache]: Analyzing trace with hash 720070723, now seen corresponding path program 1 times [2020-12-22 10:12:57,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:57,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585186619] [2020-12-22 10:12:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:58,061 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 10:12:58,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585186619] [2020-12-22 10:12:58,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:58,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:12:58,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413396589] [2020-12-22 10:12:58,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:12:58,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:58,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:12:58,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:12:58,091 INFO L87 Difference]: Start difference. First operand 944 states. Second operand 2 states. [2020-12-22 10:12:58,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:58,183 INFO L93 Difference]: Finished difference Result 1832 states and 3464 transitions. [2020-12-22 10:12:58,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:12:58,185 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:12:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:58,213 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:12:58,214 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:12:58,223 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 10:12:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:12:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:12:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:12:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1653 transitions. [2020-12-22 10:12:58,356 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1653 transitions. Word has length 42 [2020-12-22 10:12:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:58,357 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1653 transitions. [2020-12-22 10:12:58,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:12:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1653 transitions. [2020-12-22 10:12:58,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:12:58,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:58,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:58,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:12:58,366 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:58,368 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:12:58,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:58,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332640236] [2020-12-22 10:12:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:58,646 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 10:12:58,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332640236] [2020-12-22 10:12:58,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:58,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:12:58,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65606426] [2020-12-22 10:12:58,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:12:58,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:58,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:12:58,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:12:58,652 INFO L87 Difference]: Start difference. First operand 878 states and 1653 transitions. Second operand 5 states. [2020-12-22 10:12:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:58,911 INFO L93 Difference]: Finished difference Result 950 states and 1765 transitions. [2020-12-22 10:12:58,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:12:58,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:12:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:58,918 INFO L225 Difference]: With dead ends: 950 [2020-12-22 10:12:58,918 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:12:58,920 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 10:12:58,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:12:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:12:58,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:12:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1603 transitions. [2020-12-22 10:12:58,942 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1603 transitions. Word has length 42 [2020-12-22 10:12:58,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:58,943 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1603 transitions. [2020-12-22 10:12:58,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:12:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1603 transitions. [2020-12-22 10:12:58,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 10:12:58,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:58,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:58,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:12:58,946 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:58,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:58,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1873981919, now seen corresponding path program 1 times [2020-12-22 10:12:58,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:58,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167586227] [2020-12-22 10:12:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:59,129 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 10:12:59,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167586227] [2020-12-22 10:12:59,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:59,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:59,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338913509] [2020-12-22 10:12:59,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:12:59,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:59,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:12:59,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:12:59,134 INFO L87 Difference]: Start difference. First operand 878 states and 1603 transitions. Second operand 4 states. [2020-12-22 10:13:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:16,167 INFO L93 Difference]: Finished difference Result 3133 states and 5912 transitions. [2020-12-22 10:13:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:13:16,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 10:13:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:16,184 INFO L225 Difference]: With dead ends: 3133 [2020-12-22 10:13:16,184 INFO L226 Difference]: Without dead ends: 2380 [2020-12-22 10:13:16,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:13:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2020-12-22 10:13:16,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2380. [2020-12-22 10:13:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2380 states. [2020-12-22 10:13:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3717 transitions. [2020-12-22 10:13:16,252 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3717 transitions. Word has length 63 [2020-12-22 10:13:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:16,253 INFO L481 AbstractCegarLoop]: Abstraction has 2380 states and 3717 transitions. [2020-12-22 10:13:16,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:13:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3717 transitions. [2020-12-22 10:13:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:16,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:16,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:16,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:13:16,257 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:16,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:16,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:13:16,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:16,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105121206] [2020-12-22 10:13:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:16,411 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 10:13:16,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105121206] [2020-12-22 10:13:16,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:16,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:16,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331057035] [2020-12-22 10:13:16,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:16,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:16,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:16,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:16,414 INFO L87 Difference]: Start difference. First operand 2380 states and 3717 transitions. Second operand 3 states. [2020-12-22 10:13:16,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:16,472 INFO L93 Difference]: Finished difference Result 2510 states and 3923 transitions. [2020-12-22 10:13:16,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:16,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:16,487 INFO L225 Difference]: With dead ends: 2510 [2020-12-22 10:13:16,487 INFO L226 Difference]: Without dead ends: 2442 [2020-12-22 10:13:16,489 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 10:13:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2020-12-22 10:13:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2020-12-22 10:13:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2440 states. [2020-12-22 10:13:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3813 transitions. [2020-12-22 10:13:16,600 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3813 transitions. Word has length 91 [2020-12-22 10:13:16,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:16,602 INFO L481 AbstractCegarLoop]: Abstraction has 2440 states and 3813 transitions. [2020-12-22 10:13:16,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3813 transitions. [2020-12-22 10:13:16,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:16,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:16,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:16,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:13:16,604 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:16,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:16,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:13:16,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:16,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679939566] [2020-12-22 10:13:16,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:16,691 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 10:13:16,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679939566] [2020-12-22 10:13:16,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:16,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:16,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719523924] [2020-12-22 10:13:16,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:16,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:16,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:16,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:16,694 INFO L87 Difference]: Start difference. First operand 2440 states and 3813 transitions. Second operand 3 states. [2020-12-22 10:13:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:16,753 INFO L93 Difference]: Finished difference Result 2684 states and 4201 transitions. [2020-12-22 10:13:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:16,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:16,768 INFO L225 Difference]: With dead ends: 2684 [2020-12-22 10:13:16,769 INFO L226 Difference]: Without dead ends: 2556 [2020-12-22 10:13:16,770 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 10:13:16,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2020-12-22 10:13:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2554. [2020-12-22 10:13:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2554 states. [2020-12-22 10:13:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 3994 transitions. [2020-12-22 10:13:16,836 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 3994 transitions. Word has length 91 [2020-12-22 10:13:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:16,836 INFO L481 AbstractCegarLoop]: Abstraction has 2554 states and 3994 transitions. [2020-12-22 10:13:16,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 3994 transitions. [2020-12-22 10:13:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:16,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:16,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:16,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:13:16,839 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:16,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:16,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:13:16,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:16,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169760827] [2020-12-22 10:13:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:16,948 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 10:13:16,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169760827] [2020-12-22 10:13:16,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:16,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:16,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655964368] [2020-12-22 10:13:16,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:16,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:16,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:16,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:16,953 INFO L87 Difference]: Start difference. First operand 2554 states and 3994 transitions. Second operand 3 states. [2020-12-22 10:13:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:17,047 INFO L93 Difference]: Finished difference Result 3014 states and 4724 transitions. [2020-12-22 10:13:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:17,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:17,074 INFO L225 Difference]: With dead ends: 3014 [2020-12-22 10:13:17,074 INFO L226 Difference]: Without dead ends: 2772 [2020-12-22 10:13:17,076 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 10:13:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2020-12-22 10:13:17,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2770. [2020-12-22 10:13:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-12-22 10:13:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 4334 transitions. [2020-12-22 10:13:17,198 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 4334 transitions. Word has length 91 [2020-12-22 10:13:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:17,200 INFO L481 AbstractCegarLoop]: Abstraction has 2770 states and 4334 transitions. [2020-12-22 10:13:17,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:17,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 4334 transitions. [2020-12-22 10:13:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:17,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:17,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:17,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:13:17,212 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:17,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:13:17,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:17,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047561818] [2020-12-22 10:13:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:17,413 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 10:13:17,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047561818] [2020-12-22 10:13:17,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:17,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:17,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574443912] [2020-12-22 10:13:17,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:17,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:17,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:17,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:17,429 INFO L87 Difference]: Start difference. First operand 2770 states and 4334 transitions. Second operand 3 states. [2020-12-22 10:13:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:17,509 INFO L93 Difference]: Finished difference Result 3638 states and 5704 transitions. [2020-12-22 10:13:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:17,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:17,528 INFO L225 Difference]: With dead ends: 3638 [2020-12-22 10:13:17,529 INFO L226 Difference]: Without dead ends: 3180 [2020-12-22 10:13:17,535 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 10:13:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2020-12-22 10:13:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3178. [2020-12-22 10:13:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-12-22 10:13:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4970 transitions. [2020-12-22 10:13:17,630 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4970 transitions. Word has length 91 [2020-12-22 10:13:17,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:17,631 INFO L481 AbstractCegarLoop]: Abstraction has 3178 states and 4970 transitions. [2020-12-22 10:13:17,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:17,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4970 transitions. [2020-12-22 10:13:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:17,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:17,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:17,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:13:17,634 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:17,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:13:17,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:17,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293104804] [2020-12-22 10:13:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:17,748 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 10:13:17,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293104804] [2020-12-22 10:13:17,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:17,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:17,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623622866] [2020-12-22 10:13:17,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:17,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:17,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:17,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:17,752 INFO L87 Difference]: Start difference. First operand 3178 states and 4970 transitions. Second operand 3 states. [2020-12-22 10:13:17,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:17,874 INFO L93 Difference]: Finished difference Result 4814 states and 7532 transitions. [2020-12-22 10:13:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:17,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:17,897 INFO L225 Difference]: With dead ends: 4814 [2020-12-22 10:13:17,897 INFO L226 Difference]: Without dead ends: 3948 [2020-12-22 10:13:17,902 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 10:13:17,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2020-12-22 10:13:18,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3946. [2020-12-22 10:13:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3946 states. [2020-12-22 10:13:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 6154 transitions. [2020-12-22 10:13:18,067 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 6154 transitions. Word has length 91 [2020-12-22 10:13:18,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:18,070 INFO L481 AbstractCegarLoop]: Abstraction has 3946 states and 6154 transitions. [2020-12-22 10:13:18,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 6154 transitions. [2020-12-22 10:13:18,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:18,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:18,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:18,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:13:18,072 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:18,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:18,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:13:18,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:18,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94516951] [2020-12-22 10:13:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:18,293 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 10:13:18,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94516951] [2020-12-22 10:13:18,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:18,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:18,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21735060] [2020-12-22 10:13:18,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:18,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:18,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:18,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:18,297 INFO L87 Difference]: Start difference. First operand 3946 states and 6154 transitions. Second operand 9 states. [2020-12-22 10:13:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:19,962 INFO L93 Difference]: Finished difference Result 26822 states and 41784 transitions. [2020-12-22 10:13:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:13:19,963 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:13:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:20,057 INFO L225 Difference]: With dead ends: 26822 [2020-12-22 10:13:20,058 INFO L226 Difference]: Without dead ends: 25188 [2020-12-22 10:13:20,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:13:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25188 states. [2020-12-22 10:13:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25188 to 5578. [2020-12-22 10:13:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5578 states. [2020-12-22 10:13:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 8634 transitions. [2020-12-22 10:13:20,590 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 8634 transitions. Word has length 91 [2020-12-22 10:13:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:20,590 INFO L481 AbstractCegarLoop]: Abstraction has 5578 states and 8634 transitions. [2020-12-22 10:13:20,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 8634 transitions. [2020-12-22 10:13:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:20,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:20,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:20,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:13:20,592 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:20,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:20,593 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:13:20,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:20,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559835632] [2020-12-22 10:13:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:20,664 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 10:13:20,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559835632] [2020-12-22 10:13:20,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:20,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:20,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814187363] [2020-12-22 10:13:20,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:20,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:20,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:20,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:20,668 INFO L87 Difference]: Start difference. First operand 5578 states and 8634 transitions. Second operand 3 states. [2020-12-22 10:13:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:21,054 INFO L93 Difference]: Finished difference Result 10400 states and 16046 transitions. [2020-12-22 10:13:21,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:21,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:21,075 INFO L225 Difference]: With dead ends: 10400 [2020-12-22 10:13:21,076 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:13:21,081 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 10:13:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:13:21,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:13:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:13:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10972 transitions. [2020-12-22 10:13:21,566 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10972 transitions. Word has length 93 [2020-12-22 10:13:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:21,567 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10972 transitions. [2020-12-22 10:13:21,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10972 transitions. [2020-12-22 10:13:21,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:21,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:21,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:21,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:13:21,569 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:21,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:13:21,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:21,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447646568] [2020-12-22 10:13:21,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:22,019 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 10:13:22,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447646568] [2020-12-22 10:13:22,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:22,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:22,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867315546] [2020-12-22 10:13:22,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:22,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:22,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:22,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:22,022 INFO L87 Difference]: Start difference. First operand 7132 states and 10972 transitions. Second operand 9 states. [2020-12-22 10:13:22,438 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-22 10:13:22,595 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 10:13:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:23,114 INFO L93 Difference]: Finished difference Result 11952 states and 18334 transitions. [2020-12-22 10:13:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:23,115 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:13:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:23,134 INFO L225 Difference]: With dead ends: 11952 [2020-12-22 10:13:23,134 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:13:23,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:13:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:13:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:13:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:13:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10924 transitions. [2020-12-22 10:13:23,524 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10924 transitions. Word has length 93 [2020-12-22 10:13:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:23,524 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10924 transitions. [2020-12-22 10:13:23,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10924 transitions. [2020-12-22 10:13:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:23,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:23,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:23,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:13:23,526 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:23,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:23,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:13:23,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:23,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102022667] [2020-12-22 10:13:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:23,625 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 10:13:23,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102022667] [2020-12-22 10:13:23,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:23,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:23,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157845084] [2020-12-22 10:13:23,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:23,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:23,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:23,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:23,628 INFO L87 Difference]: Start difference. First operand 7132 states and 10924 transitions. Second operand 3 states. [2020-12-22 10:13:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:24,461 INFO L93 Difference]: Finished difference Result 16192 states and 24590 transitions. [2020-12-22 10:13:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:24,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:24,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:24,492 INFO L225 Difference]: With dead ends: 16192 [2020-12-22 10:13:24,492 INFO L226 Difference]: Without dead ends: 11374 [2020-12-22 10:13:24,506 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 10:13:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11374 states. [2020-12-22 10:13:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11374 to 11372. [2020-12-22 10:13:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11372 states. [2020-12-22 10:13:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 17180 transitions. [2020-12-22 10:13:25,314 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 17180 transitions. Word has length 93 [2020-12-22 10:13:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:25,315 INFO L481 AbstractCegarLoop]: Abstraction has 11372 states and 17180 transitions. [2020-12-22 10:13:25,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 17180 transitions. [2020-12-22 10:13:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:25,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:25,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:25,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:13:25,317 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:13:25,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:25,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157799063] [2020-12-22 10:13:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:25,399 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 10:13:25,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157799063] [2020-12-22 10:13:25,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:25,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:25,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036582856] [2020-12-22 10:13:25,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:25,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:25,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:25,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:25,407 INFO L87 Difference]: Start difference. First operand 11372 states and 17180 transitions. Second operand 3 states. [2020-12-22 10:13:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:26,492 INFO L93 Difference]: Finished difference Result 28336 states and 42398 transitions. [2020-12-22 10:13:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:26,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:26,535 INFO L225 Difference]: With dead ends: 28336 [2020-12-22 10:13:26,535 INFO L226 Difference]: Without dead ends: 19278 [2020-12-22 10:13:26,552 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 10:13:26,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2020-12-22 10:13:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 19276. [2020-12-22 10:13:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:13:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28636 transitions. [2020-12-22 10:13:27,922 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28636 transitions. Word has length 93 [2020-12-22 10:13:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:27,924 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28636 transitions. [2020-12-22 10:13:27,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:27,924 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28636 transitions. [2020-12-22 10:13:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:27,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:27,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:27,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:13:27,926 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:27,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:27,927 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:13:27,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:27,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574549293] [2020-12-22 10:13:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:28,072 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 10:13:28,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574549293] [2020-12-22 10:13:28,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:28,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:28,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450844084] [2020-12-22 10:13:28,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:13:28,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:28,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:13:28,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:13:28,075 INFO L87 Difference]: Start difference. First operand 19276 states and 28636 transitions. Second operand 6 states. [2020-12-22 10:13:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:29,811 INFO L93 Difference]: Finished difference Result 36238 states and 53661 transitions. [2020-12-22 10:13:29,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:13:29,812 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:13:29,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:29,846 INFO L225 Difference]: With dead ends: 36238 [2020-12-22 10:13:29,847 INFO L226 Difference]: Without dead ends: 19276 [2020-12-22 10:13:29,867 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 10:13:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19276 states. [2020-12-22 10:13:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19276 to 19276. [2020-12-22 10:13:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:13:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28380 transitions. [2020-12-22 10:13:31,037 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28380 transitions. Word has length 94 [2020-12-22 10:13:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:31,038 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28380 transitions. [2020-12-22 10:13:31,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:13:31,038 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28380 transitions. [2020-12-22 10:13:31,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:31,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:31,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:31,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:13:31,040 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:31,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:13:31,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:31,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376561981] [2020-12-22 10:13:31,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:31,157 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 10:13:31,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376561981] [2020-12-22 10:13:31,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:31,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:31,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278509871] [2020-12-22 10:13:31,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:13:31,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:31,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:13:31,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:13:31,159 INFO L87 Difference]: Start difference. First operand 19276 states and 28380 transitions. Second operand 6 states. [2020-12-22 10:13:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:32,480 INFO L93 Difference]: Finished difference Result 36238 states and 53149 transitions. [2020-12-22 10:13:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:13:32,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:13:32,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:32,520 INFO L225 Difference]: With dead ends: 36238 [2020-12-22 10:13:32,520 INFO L226 Difference]: Without dead ends: 19276 [2020-12-22 10:13:32,555 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 10:13:32,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19276 states. [2020-12-22 10:13:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19276 to 19276. [2020-12-22 10:13:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:13:33,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28188 transitions. [2020-12-22 10:13:33,724 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28188 transitions. Word has length 94 [2020-12-22 10:13:33,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:33,725 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28188 transitions. [2020-12-22 10:13:33,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:13:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28188 transitions. [2020-12-22 10:13:33,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:33,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:33,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:33,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:13:33,727 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:33,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:33,727 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:13:33,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:33,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348733694] [2020-12-22 10:13:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:33,883 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 10:13:33,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348733694] [2020-12-22 10:13:33,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:33,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:13:33,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243172530] [2020-12-22 10:13:33,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:13:33,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:33,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:13:33,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:13:33,888 INFO L87 Difference]: Start difference. First operand 19276 states and 28188 transitions. Second operand 8 states. [2020-12-22 10:13:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:36,244 INFO L93 Difference]: Finished difference Result 33775 states and 48838 transitions. [2020-12-22 10:13:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:13:36,245 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:13:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:36,305 INFO L225 Difference]: With dead ends: 33775 [2020-12-22 10:13:36,306 INFO L226 Difference]: Without dead ends: 33773 [2020-12-22 10:13:36,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33773 states. [2020-12-22 10:13:37,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33773 to 20044. [2020-12-22 10:13:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20044 states. [2020-12-22 10:13:37,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20044 states to 20044 states and 28892 transitions. [2020-12-22 10:13:37,758 INFO L78 Accepts]: Start accepts. Automaton has 20044 states and 28892 transitions. Word has length 94 [2020-12-22 10:13:37,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:37,758 INFO L481 AbstractCegarLoop]: Abstraction has 20044 states and 28892 transitions. [2020-12-22 10:13:37,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:13:37,758 INFO L276 IsEmpty]: Start isEmpty. Operand 20044 states and 28892 transitions. [2020-12-22 10:13:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:13:37,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:37,774 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:37,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:13:37,775 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:37,775 INFO L82 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2020-12-22 10:13:37,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:37,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422239942] [2020-12-22 10:13:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:13:38,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422239942] [2020-12-22 10:13:38,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:38,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:38,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445258106] [2020-12-22 10:13:38,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:38,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:38,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:38,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:38,061 INFO L87 Difference]: Start difference. First operand 20044 states and 28892 transitions. Second operand 9 states. [2020-12-22 10:13:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:46,621 INFO L93 Difference]: Finished difference Result 147612 states and 210628 transitions. [2020-12-22 10:13:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:46,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:13:46,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:46,841 INFO L225 Difference]: With dead ends: 147612 [2020-12-22 10:13:46,841 INFO L226 Difference]: Without dead ends: 129882 [2020-12-22 10:13:46,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129882 states. [2020-12-22 10:13:50,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129882 to 37772. [2020-12-22 10:13:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37772 states. [2020-12-22 10:13:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37772 states to 37772 states and 53980 transitions. [2020-12-22 10:13:50,717 INFO L78 Accepts]: Start accepts. Automaton has 37772 states and 53980 transitions. Word has length 130 [2020-12-22 10:13:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:50,717 INFO L481 AbstractCegarLoop]: Abstraction has 37772 states and 53980 transitions. [2020-12-22 10:13:50,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:50,718 INFO L276 IsEmpty]: Start isEmpty. Operand 37772 states and 53980 transitions. [2020-12-22 10:13:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:13:50,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:50,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:50,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:13:50,735 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:50,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2020-12-22 10:13:50,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:50,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136704585] [2020-12-22 10:13:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:13:50,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136704585] [2020-12-22 10:13:50,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:50,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:50,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743670705] [2020-12-22 10:13:50,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:50,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:50,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:50,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:50,964 INFO L87 Difference]: Start difference. First operand 37772 states and 53980 transitions. Second operand 9 states. [2020-12-22 10:14:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:01,296 INFO L93 Difference]: Finished difference Result 165340 states and 235716 transitions. [2020-12-22 10:14:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:01,297 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:01,702 INFO L225 Difference]: With dead ends: 165340 [2020-12-22 10:14:01,703 INFO L226 Difference]: Without dead ends: 147610 [2020-12-22 10:14:01,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147610 states. [2020-12-22 10:14:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147610 to 64396. [2020-12-22 10:14:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64396 states. [2020-12-22 10:14:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64396 states to 64396 states and 91452 transitions. [2020-12-22 10:14:07,780 INFO L78 Accepts]: Start accepts. Automaton has 64396 states and 91452 transitions. Word has length 130 [2020-12-22 10:14:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:07,781 INFO L481 AbstractCegarLoop]: Abstraction has 64396 states and 91452 transitions. [2020-12-22 10:14:07,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:07,781 INFO L276 IsEmpty]: Start isEmpty. Operand 64396 states and 91452 transitions. [2020-12-22 10:14:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:07,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:07,803 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:07,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:14:07,803 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:07,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2020-12-22 10:14:07,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:07,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289663037] [2020-12-22 10:14:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:14:08,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289663037] [2020-12-22 10:14:08,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:08,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:08,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766877550] [2020-12-22 10:14:08,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:08,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:08,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:08,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:08,184 INFO L87 Difference]: Start difference. First operand 64396 states and 91452 transitions. Second operand 9 states. [2020-12-22 10:14:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:20,594 INFO L93 Difference]: Finished difference Result 183068 states and 260804 transitions. [2020-12-22 10:14:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:20,595 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:20,990 INFO L225 Difference]: With dead ends: 183068 [2020-12-22 10:14:20,991 INFO L226 Difference]: Without dead ends: 165338 [2020-12-22 10:14:21,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165338 states. [2020-12-22 10:14:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165338 to 82124. [2020-12-22 10:14:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82124 states. [2020-12-22 10:14:28,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82124 states to 82124 states and 116540 transitions. [2020-12-22 10:14:28,434 INFO L78 Accepts]: Start accepts. Automaton has 82124 states and 116540 transitions. Word has length 130 [2020-12-22 10:14:28,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:28,434 INFO L481 AbstractCegarLoop]: Abstraction has 82124 states and 116540 transitions. [2020-12-22 10:14:28,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 82124 states and 116540 transitions. [2020-12-22 10:14:28,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:28,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:28,453 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:28,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:14:28,453 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:28,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:28,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2020-12-22 10:14:28,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:28,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313229404] [2020-12-22 10:14:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:14:28,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313229404] [2020-12-22 10:14:28,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:28,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:28,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143281078] [2020-12-22 10:14:28,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:28,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:28,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:28,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:28,662 INFO L87 Difference]: Start difference. First operand 82124 states and 116540 transitions. Second operand 9 states. [2020-12-22 10:14:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:44,247 INFO L93 Difference]: Finished difference Result 200796 states and 285892 transitions. [2020-12-22 10:14:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:44,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:44,543 INFO L225 Difference]: With dead ends: 200796 [2020-12-22 10:14:44,543 INFO L226 Difference]: Without dead ends: 183066 [2020-12-22 10:14:44,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183066 states. [2020-12-22 10:14:54,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183066 to 99852. [2020-12-22 10:14:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99852 states. [2020-12-22 10:14:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99852 states to 99852 states and 141628 transitions. [2020-12-22 10:14:54,242 INFO L78 Accepts]: Start accepts. Automaton has 99852 states and 141628 transitions. Word has length 130 [2020-12-22 10:14:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:54,243 INFO L481 AbstractCegarLoop]: Abstraction has 99852 states and 141628 transitions. [2020-12-22 10:14:54,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:54,243 INFO L276 IsEmpty]: Start isEmpty. Operand 99852 states and 141628 transitions. [2020-12-22 10:14:54,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:54,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:54,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:54,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:14:54,267 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:54,268 INFO L82 PathProgramCache]: Analyzing trace with hash 162359075, now seen corresponding path program 1 times [2020-12-22 10:14:54,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:54,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158412496] [2020-12-22 10:14:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:14:54,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158412496] [2020-12-22 10:14:54,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:54,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:54,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575047256] [2020-12-22 10:14:54,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:54,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:54,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:54,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:54,750 INFO L87 Difference]: Start difference. First operand 99852 states and 141628 transitions. Second operand 9 states. [2020-12-22 10:15:12,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:12,696 INFO L93 Difference]: Finished difference Result 218524 states and 310980 transitions. [2020-12-22 10:15:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:12,696 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:13,186 INFO L225 Difference]: With dead ends: 218524 [2020-12-22 10:15:13,186 INFO L226 Difference]: Without dead ends: 200794 [2020-12-22 10:15:13,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200794 states. [2020-12-22 10:15:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200794 to 117580. [2020-12-22 10:15:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117580 states. [2020-12-22 10:15:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117580 states to 117580 states and 166716 transitions. [2020-12-22 10:15:24,914 INFO L78 Accepts]: Start accepts. Automaton has 117580 states and 166716 transitions. Word has length 130 [2020-12-22 10:15:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:24,914 INFO L481 AbstractCegarLoop]: Abstraction has 117580 states and 166716 transitions. [2020-12-22 10:15:24,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 117580 states and 166716 transitions. [2020-12-22 10:15:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:24,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:24,930 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:24,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:15:24,930 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:24,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:24,930 INFO L82 PathProgramCache]: Analyzing trace with hash -403461309, now seen corresponding path program 1 times [2020-12-22 10:15:24,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:24,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625330459] [2020-12-22 10:15:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:15:25,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625330459] [2020-12-22 10:15:25,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:25,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:25,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187723973] [2020-12-22 10:15:25,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:25,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:25,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:25,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:25,155 INFO L87 Difference]: Start difference. First operand 117580 states and 166716 transitions. Second operand 9 states. [2020-12-22 10:15:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:46,960 INFO L93 Difference]: Finished difference Result 236252 states and 336068 transitions. [2020-12-22 10:15:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:46,965 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:46,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:47,505 INFO L225 Difference]: With dead ends: 236252 [2020-12-22 10:15:47,506 INFO L226 Difference]: Without dead ends: 218522 [2020-12-22 10:15:47,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218522 states. [2020-12-22 10:16:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218522 to 135308. [2020-12-22 10:16:02,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135308 states. [2020-12-22 10:16:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135308 states to 135308 states and 191804 transitions. [2020-12-22 10:16:02,429 INFO L78 Accepts]: Start accepts. Automaton has 135308 states and 191804 transitions. Word has length 130 [2020-12-22 10:16:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:02,430 INFO L481 AbstractCegarLoop]: Abstraction has 135308 states and 191804 transitions. [2020-12-22 10:16:02,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 135308 states and 191804 transitions. [2020-12-22 10:16:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:16:02,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:02,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:02,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:16:02,449 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:02,450 INFO L82 PathProgramCache]: Analyzing trace with hash -214245533, now seen corresponding path program 1 times [2020-12-22 10:16:02,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:02,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317077868] [2020-12-22 10:16:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:16:02,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317077868] [2020-12-22 10:16:02,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:02,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:02,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510204918] [2020-12-22 10:16:02,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:02,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:02,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:02,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:02,921 INFO L87 Difference]: Start difference. First operand 135308 states and 191804 transitions. Second operand 9 states.