/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.3.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:40:47,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:40:47,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:40:47,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:40:47,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:40:47,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:40:47,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:40:47,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:40:47,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:40:47,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:40:47,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:40:47,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:40:47,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:40:47,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:40:47,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:40:47,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:40:47,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:40:47,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:40:47,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:40:47,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:40:47,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:40:47,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:40:47,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:40:47,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:40:47,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 09:40:47,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 09:40:47,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 09:40:47,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 09:40:47,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 09:40:47,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 09:40:47,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:40:47,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:40:47,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:40:47,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:40:47,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:40:47,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:40:47,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:40:47,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:40:47,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:40:47,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:40:47,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:40:47,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:40:47,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:40:47,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:40:47,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:40:47,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:40:47,795 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:40:47,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:40:47,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:40:47,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:40:47,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:40:47,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:40:47,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:40:47,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:40:47,817 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:40:47,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:40:47,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:40:47,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:40:47,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:40:47,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:40:47,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:40:47,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:40:47,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:40:47,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:40:47,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:40:47,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:40:47,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:40:47,822 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:40:48,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:40:48,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:40:48,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:40:48,324 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:40:48,325 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:40:48,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:40:48,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a34dab1/1e21640bfa1241b6bc1727869fb28541/FLAGb990de0e5 [2020-12-22 09:40:49,524 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:40:49,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:40:49,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a34dab1/1e21640bfa1241b6bc1727869fb28541/FLAGb990de0e5 [2020-12-22 09:40:49,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a34dab1/1e21640bfa1241b6bc1727869fb28541 [2020-12-22 09:40:49,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:40:49,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:40:49,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:40:49,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:40:49,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:40:49,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:40:49" (1/1) ... [2020-12-22 09:40:49,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@289a823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:49, skipping insertion in model container [2020-12-22 09:40:49,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:40:49" (1/1) ... [2020-12-22 09:40:49,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:40:49,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:40:50,306 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.3.ufo.UNBOUNDED.pals+Problem12_label09.c[6508,6521] [2020-12-22 09:40:50,387 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.3.ufo.UNBOUNDED.pals+Problem12_label09.c[14013,14026] [2020-12-22 09:40:51,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:40:51,525 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:40:51,586 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.3.ufo.UNBOUNDED.pals+Problem12_label09.c[6508,6521] [2020-12-22 09:40:51,607 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.3.ufo.UNBOUNDED.pals+Problem12_label09.c[14013,14026] [2020-12-22 09:40:52,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:40:52,305 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:40:52,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:52 WrapperNode [2020-12-22 09:40:52,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:40:52,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:40:52,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:40:52,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:40:52,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:52" (1/1) ... [2020-12-22 09:40:52,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:52" (1/1) ... [2020-12-22 09:40:52,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:40:52,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:40:52,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:40:52,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:40:52,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:52" (1/1) ... [2020-12-22 09:40:52,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:52" (1/1) ... [2020-12-22 09:40:53,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:52" (1/1) ... [2020-12-22 09:40:53,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:52" (1/1) ... [2020-12-22 09:40:53,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:52" (1/1) ... [2020-12-22 09:40:53,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:52" (1/1) ... [2020-12-22 09:40:53,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:52" (1/1) ... [2020-12-22 09:40:53,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:40:53,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:40:53,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:40:53,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:40:53,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:52" (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 09:40:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:40:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:40:53,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:40:53,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:40:59,105 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:40:59,106 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:40:59,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:40:59 BoogieIcfgContainer [2020-12-22 09:40:59,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:40:59,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:40:59,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:40:59,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:40:59,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:40:49" (1/3) ... [2020-12-22 09:40:59,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5715c5d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:40:59, skipping insertion in model container [2020-12-22 09:40:59,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:52" (2/3) ... [2020-12-22 09:40:59,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5715c5d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:40:59, skipping insertion in model container [2020-12-22 09:40:59,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:40:59" (3/3) ... [2020-12-22 09:40:59,123 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:40:59,133 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:40:59,139 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:40:59,158 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:40:59,195 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:40:59,195 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:40:59,195 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:40:59,196 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:40:59,196 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:40:59,196 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:40:59,196 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:40:59,196 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:40:59,230 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states. [2020-12-22 09:40:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:40:59,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:40:59,239 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] [2020-12-22 09:40:59,239 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:40:59,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:40:59,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1601385972, now seen corresponding path program 1 times [2020-12-22 09:40:59,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:40:59,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202941633] [2020-12-22 09:40:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:40:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:40:59,459 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 09:40:59,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202941633] [2020-12-22 09:40:59,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:40:59,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:40:59,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114654910] [2020-12-22 09:40:59,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:40:59,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:40:59,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:40:59,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:40:59,486 INFO L87 Difference]: Start difference. First operand 879 states. Second operand 2 states. [2020-12-22 09:40:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:40:59,580 INFO L93 Difference]: Finished difference Result 1734 states and 3294 transitions. [2020-12-22 09:40:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:40:59,581 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-12-22 09:40:59,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:40:59,608 INFO L225 Difference]: With dead ends: 1734 [2020-12-22 09:40:59,608 INFO L226 Difference]: Without dead ends: 813 [2020-12-22 09:40:59,622 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 09:40:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2020-12-22 09:40:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 813. [2020-12-22 09:40:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2020-12-22 09:40:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1535 transitions. [2020-12-22 09:40:59,754 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1535 transitions. Word has length 26 [2020-12-22 09:40:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:40:59,755 INFO L481 AbstractCegarLoop]: Abstraction has 813 states and 1535 transitions. [2020-12-22 09:40:59,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:40:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1535 transitions. [2020-12-22 09:40:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:40:59,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:40:59,757 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] [2020-12-22 09:40:59,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:40:59,758 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:40:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:40:59,759 INFO L82 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2020-12-22 09:40:59,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:40:59,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56725380] [2020-12-22 09:40:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:40:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:00,020 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 09:41:00,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56725380] [2020-12-22 09:41:00,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:00,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:00,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127828698] [2020-12-22 09:41:00,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:00,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:00,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:00,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:00,026 INFO L87 Difference]: Start difference. First operand 813 states and 1535 transitions. Second operand 5 states. [2020-12-22 09:41:00,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:00,278 INFO L93 Difference]: Finished difference Result 854 states and 1597 transitions. [2020-12-22 09:41:00,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:00,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:41:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:00,285 INFO L225 Difference]: With dead ends: 854 [2020-12-22 09:41:00,286 INFO L226 Difference]: Without dead ends: 813 [2020-12-22 09:41:00,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:00,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2020-12-22 09:41:00,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 813. [2020-12-22 09:41:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2020-12-22 09:41:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1519 transitions. [2020-12-22 09:41:00,312 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1519 transitions. Word has length 26 [2020-12-22 09:41:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:00,312 INFO L481 AbstractCegarLoop]: Abstraction has 813 states and 1519 transitions. [2020-12-22 09:41:00,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1519 transitions. [2020-12-22 09:41:00,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:41:00,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:00,315 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] [2020-12-22 09:41:00,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:41:00,316 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:00,316 INFO L82 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2020-12-22 09:41:00,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:00,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917339694] [2020-12-22 09:41:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:00,422 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 09:41:00,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917339694] [2020-12-22 09:41:00,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:00,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:00,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508472334] [2020-12-22 09:41:00,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:00,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:00,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:00,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:00,433 INFO L87 Difference]: Start difference. First operand 813 states and 1519 transitions. Second operand 3 states. [2020-12-22 09:41:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:00,480 INFO L93 Difference]: Finished difference Result 881 states and 1625 transitions. [2020-12-22 09:41:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:00,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:41:00,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:00,489 INFO L225 Difference]: With dead ends: 881 [2020-12-22 09:41:00,491 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:41:00,496 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 09:41:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:41:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 842. [2020-12-22 09:41:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 09:41:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1565 transitions. [2020-12-22 09:41:00,537 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1565 transitions. Word has length 41 [2020-12-22 09:41:00,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:00,538 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1565 transitions. [2020-12-22 09:41:00,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:00,538 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1565 transitions. [2020-12-22 09:41:00,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:41:00,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:00,544 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] [2020-12-22 09:41:00,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:41:00,545 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:00,546 INFO L82 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2020-12-22 09:41:00,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:00,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757256144] [2020-12-22 09:41:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:00,652 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 09:41:00,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757256144] [2020-12-22 09:41:00,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:00,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:00,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485817587] [2020-12-22 09:41:00,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:00,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:00,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:00,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:00,658 INFO L87 Difference]: Start difference. First operand 842 states and 1565 transitions. Second operand 3 states. [2020-12-22 09:41:00,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:00,707 INFO L93 Difference]: Finished difference Result 962 states and 1753 transitions. [2020-12-22 09:41:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:00,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:41:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:00,713 INFO L225 Difference]: With dead ends: 962 [2020-12-22 09:41:00,714 INFO L226 Difference]: Without dead ends: 896 [2020-12-22 09:41:00,715 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 09:41:00,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-12-22 09:41:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 894. [2020-12-22 09:41:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2020-12-22 09:41:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1646 transitions. [2020-12-22 09:41:00,744 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1646 transitions. Word has length 41 [2020-12-22 09:41:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:00,744 INFO L481 AbstractCegarLoop]: Abstraction has 894 states and 1646 transitions. [2020-12-22 09:41:00,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:00,745 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1646 transitions. [2020-12-22 09:41:00,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:41:00,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:00,750 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] [2020-12-22 09:41:00,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:41:00,750 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:00,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:00,751 INFO L82 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2020-12-22 09:41:00,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:00,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746064537] [2020-12-22 09:41:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:00,899 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 09:41:00,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746064537] [2020-12-22 09:41:00,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:00,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:00,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249016525] [2020-12-22 09:41:00,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:00,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:00,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:00,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:00,904 INFO L87 Difference]: Start difference. First operand 894 states and 1646 transitions. Second operand 5 states. [2020-12-22 09:41:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:01,130 INFO L93 Difference]: Finished difference Result 1602 states and 2756 transitions. [2020-12-22 09:41:01,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:41:01,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:41:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:01,140 INFO L225 Difference]: With dead ends: 1602 [2020-12-22 09:41:01,140 INFO L226 Difference]: Without dead ends: 1484 [2020-12-22 09:41:01,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:41:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2020-12-22 09:41:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1010. [2020-12-22 09:41:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2020-12-22 09:41:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1822 transitions. [2020-12-22 09:41:01,191 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1822 transitions. Word has length 41 [2020-12-22 09:41:01,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:01,193 INFO L481 AbstractCegarLoop]: Abstraction has 1010 states and 1822 transitions. [2020-12-22 09:41:01,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1822 transitions. [2020-12-22 09:41:01,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:01,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:01,195 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] [2020-12-22 09:41:01,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:41:01,195 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:01,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2020-12-22 09:41:01,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:01,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146993290] [2020-12-22 09:41:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:01,288 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 09:41:01,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146993290] [2020-12-22 09:41:01,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:01,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:01,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347869884] [2020-12-22 09:41:01,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:01,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:01,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:01,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:01,292 INFO L87 Difference]: Start difference. First operand 1010 states and 1822 transitions. Second operand 3 states. [2020-12-22 09:41:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:01,355 INFO L93 Difference]: Finished difference Result 1434 states and 2468 transitions. [2020-12-22 09:41:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:01,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:01,364 INFO L225 Difference]: With dead ends: 1434 [2020-12-22 09:41:01,364 INFO L226 Difference]: Without dead ends: 1200 [2020-12-22 09:41:01,365 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 09:41:01,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2020-12-22 09:41:01,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1190. [2020-12-22 09:41:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2020-12-22 09:41:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2078 transitions. [2020-12-22 09:41:01,412 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2078 transitions. Word has length 43 [2020-12-22 09:41:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:01,412 INFO L481 AbstractCegarLoop]: Abstraction has 1190 states and 2078 transitions. [2020-12-22 09:41:01,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:01,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2078 transitions. [2020-12-22 09:41:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:01,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:01,414 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] [2020-12-22 09:41:01,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:41:01,414 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:01,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:01,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2020-12-22 09:41:01,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:01,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702567333] [2020-12-22 09:41:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:01,537 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 09:41:01,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702567333] [2020-12-22 09:41:01,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:01,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:01,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848258086] [2020-12-22 09:41:01,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:01,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:01,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:01,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:01,540 INFO L87 Difference]: Start difference. First operand 1190 states and 2078 transitions. Second operand 5 states. [2020-12-22 09:41:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:01,662 INFO L93 Difference]: Finished difference Result 1606 states and 2696 transitions. [2020-12-22 09:41:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:01,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:41:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:01,670 INFO L225 Difference]: With dead ends: 1606 [2020-12-22 09:41:01,670 INFO L226 Difference]: Without dead ends: 1192 [2020-12-22 09:41:01,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2020-12-22 09:41:01,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1190. [2020-12-22 09:41:01,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2020-12-22 09:41:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2070 transitions. [2020-12-22 09:41:01,722 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2070 transitions. Word has length 43 [2020-12-22 09:41:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:01,722 INFO L481 AbstractCegarLoop]: Abstraction has 1190 states and 2070 transitions. [2020-12-22 09:41:01,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2070 transitions. [2020-12-22 09:41:01,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:41:01,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:01,725 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] [2020-12-22 09:41:01,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:41:01,726 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:01,726 INFO L82 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2020-12-22 09:41:01,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:01,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085737724] [2020-12-22 09:41:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:01,867 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 09:41:01,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085737724] [2020-12-22 09:41:01,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:01,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:41:01,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107539445] [2020-12-22 09:41:01,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:41:01,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:01,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:41:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:41:01,914 INFO L87 Difference]: Start difference. First operand 1190 states and 2070 transitions. Second operand 8 states. [2020-12-22 09:41:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:02,131 INFO L93 Difference]: Finished difference Result 1516 states and 2534 transitions. [2020-12-22 09:41:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:41:02,132 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-22 09:41:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:02,141 INFO L225 Difference]: With dead ends: 1516 [2020-12-22 09:41:02,141 INFO L226 Difference]: Without dead ends: 1514 [2020-12-22 09:41:02,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:41:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-12-22 09:41:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1214. [2020-12-22 09:41:02,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1214 states. [2020-12-22 09:41:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2090 transitions. [2020-12-22 09:41:02,195 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2090 transitions. Word has length 44 [2020-12-22 09:41:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:02,195 INFO L481 AbstractCegarLoop]: Abstraction has 1214 states and 2090 transitions. [2020-12-22 09:41:02,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:41:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2090 transitions. [2020-12-22 09:41:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 09:41:02,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:02,197 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] [2020-12-22 09:41:02,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:41:02,197 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:02,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:02,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2020-12-22 09:41:02,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:02,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20249962] [2020-12-22 09:41:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:02,237 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 09:41:02,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20249962] [2020-12-22 09:41:02,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:02,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:02,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082431305] [2020-12-22 09:41:02,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:02,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:02,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:02,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:02,240 INFO L87 Difference]: Start difference. First operand 1214 states and 2090 transitions. Second operand 3 states. [2020-12-22 09:41:02,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:02,309 INFO L93 Difference]: Finished difference Result 1669 states and 2752 transitions. [2020-12-22 09:41:02,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:02,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 09:41:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:02,318 INFO L225 Difference]: With dead ends: 1669 [2020-12-22 09:41:02,318 INFO L226 Difference]: Without dead ends: 1410 [2020-12-22 09:41:02,319 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 09:41:02,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2020-12-22 09:41:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1408. [2020-12-22 09:41:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1408 states. [2020-12-22 09:41:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2360 transitions. [2020-12-22 09:41:02,381 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2360 transitions. Word has length 45 [2020-12-22 09:41:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:02,381 INFO L481 AbstractCegarLoop]: Abstraction has 1408 states and 2360 transitions. [2020-12-22 09:41:02,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2360 transitions. [2020-12-22 09:41:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:02,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:02,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:02,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:41:02,383 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:02,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1836022441, now seen corresponding path program 1 times [2020-12-22 09:41:02,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:02,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973180840] [2020-12-22 09:41:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:41:02,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973180840] [2020-12-22 09:41:02,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:02,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:02,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623628805] [2020-12-22 09:41:02,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:02,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:02,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:02,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:02,461 INFO L87 Difference]: Start difference. First operand 1408 states and 2360 transitions. Second operand 5 states. [2020-12-22 09:41:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:02,668 INFO L93 Difference]: Finished difference Result 3436 states and 5236 transitions. [2020-12-22 09:41:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:02,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:02,683 INFO L225 Difference]: With dead ends: 3436 [2020-12-22 09:41:02,683 INFO L226 Difference]: Without dead ends: 2806 [2020-12-22 09:41:02,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:02,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2020-12-22 09:41:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2036. [2020-12-22 09:41:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2036 states. [2020-12-22 09:41:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 3244 transitions. [2020-12-22 09:41:02,796 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 3244 transitions. Word has length 63 [2020-12-22 09:41:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:02,798 INFO L481 AbstractCegarLoop]: Abstraction has 2036 states and 3244 transitions. [2020-12-22 09:41:02,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 3244 transitions. [2020-12-22 09:41:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:02,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:02,799 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:02,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:41:02,800 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:02,800 INFO L82 PathProgramCache]: Analyzing trace with hash 67239625, now seen corresponding path program 1 times [2020-12-22 09:41:02,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:02,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478648543] [2020-12-22 09:41:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:41:02,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478648543] [2020-12-22 09:41:02,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:02,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:02,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784713669] [2020-12-22 09:41:02,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:02,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:02,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:02,912 INFO L87 Difference]: Start difference. First operand 2036 states and 3244 transitions. Second operand 5 states. [2020-12-22 09:41:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:03,220 INFO L93 Difference]: Finished difference Result 4064 states and 6120 transitions. [2020-12-22 09:41:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:03,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:03,237 INFO L225 Difference]: With dead ends: 4064 [2020-12-22 09:41:03,238 INFO L226 Difference]: Without dead ends: 3434 [2020-12-22 09:41:03,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2020-12-22 09:41:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2980. [2020-12-22 09:41:03,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2980 states. [2020-12-22 09:41:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 4560 transitions. [2020-12-22 09:41:03,411 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 4560 transitions. Word has length 63 [2020-12-22 09:41:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:03,411 INFO L481 AbstractCegarLoop]: Abstraction has 2980 states and 4560 transitions. [2020-12-22 09:41:03,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 4560 transitions. [2020-12-22 09:41:03,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:03,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:03,413 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:03,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:41:03,414 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:03,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:03,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2131767521, now seen corresponding path program 1 times [2020-12-22 09:41:03,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:03,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010457065] [2020-12-22 09:41:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:03,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010457065] [2020-12-22 09:41:03,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:03,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:03,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569000023] [2020-12-22 09:41:03,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:03,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:03,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:03,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:03,497 INFO L87 Difference]: Start difference. First operand 2980 states and 4560 transitions. Second operand 3 states. [2020-12-22 09:41:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:03,632 INFO L93 Difference]: Finished difference Result 4573 states and 6827 transitions. [2020-12-22 09:41:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:03,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:41:03,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:03,645 INFO L225 Difference]: With dead ends: 4573 [2020-12-22 09:41:03,645 INFO L226 Difference]: Without dead ends: 2371 [2020-12-22 09:41:03,650 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 09:41:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2020-12-22 09:41:03,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 2369. [2020-12-22 09:41:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2369 states. [2020-12-22 09:41:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 3700 transitions. [2020-12-22 09:41:03,779 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 3700 transitions. Word has length 65 [2020-12-22 09:41:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:03,779 INFO L481 AbstractCegarLoop]: Abstraction has 2369 states and 3700 transitions. [2020-12-22 09:41:03,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 3700 transitions. [2020-12-22 09:41:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:03,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:03,781 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:03,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:41:03,781 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:03,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1187468114, now seen corresponding path program 1 times [2020-12-22 09:41:03,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:03,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971921176] [2020-12-22 09:41:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:41:03,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971921176] [2020-12-22 09:41:03,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:03,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:03,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839047105] [2020-12-22 09:41:03,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:03,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:03,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:03,867 INFO L87 Difference]: Start difference. First operand 2369 states and 3700 transitions. Second operand 5 states. [2020-12-22 09:41:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:04,094 INFO L93 Difference]: Finished difference Result 3721 states and 5624 transitions. [2020-12-22 09:41:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:04,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 09:41:04,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:04,115 INFO L225 Difference]: With dead ends: 3721 [2020-12-22 09:41:04,115 INFO L226 Difference]: Without dead ends: 3271 [2020-12-22 09:41:04,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-12-22 09:41:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 2817. [2020-12-22 09:41:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2817 states. [2020-12-22 09:41:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 4332 transitions. [2020-12-22 09:41:04,322 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 4332 transitions. Word has length 65 [2020-12-22 09:41:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:04,323 INFO L481 AbstractCegarLoop]: Abstraction has 2817 states and 4332 transitions. [2020-12-22 09:41:04,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 4332 transitions. [2020-12-22 09:41:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:41:04,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:04,325 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:04,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:41:04,325 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:04,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:04,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1662229482, now seen corresponding path program 1 times [2020-12-22 09:41:04,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:04,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446578453] [2020-12-22 09:41:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:04,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446578453] [2020-12-22 09:41:04,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649550393] [2020-12-22 09:41:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:41:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:04,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:41:04,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:41:04,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:04,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:41:04,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488603298] [2020-12-22 09:41:04,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:41:04,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:04,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:41:04,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:41:04,908 INFO L87 Difference]: Start difference. First operand 2817 states and 4332 transitions. Second operand 12 states. [2020-12-22 09:41:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:08,099 INFO L93 Difference]: Finished difference Result 12111 states and 17088 transitions. [2020-12-22 09:41:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 09:41:08,100 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-22 09:41:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:08,136 INFO L225 Difference]: With dead ends: 12111 [2020-12-22 09:41:08,137 INFO L226 Difference]: Without dead ends: 10093 [2020-12-22 09:41:08,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:41:08,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10093 states. [2020-12-22 09:41:08,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10093 to 6829. [2020-12-22 09:41:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6829 states. [2020-12-22 09:41:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6829 states to 6829 states and 9609 transitions. [2020-12-22 09:41:08,800 INFO L78 Accepts]: Start accepts. Automaton has 6829 states and 9609 transitions. Word has length 66 [2020-12-22 09:41:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:08,801 INFO L481 AbstractCegarLoop]: Abstraction has 6829 states and 9609 transitions. [2020-12-22 09:41:08,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:41:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 6829 states and 9609 transitions. [2020-12-22 09:41:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:41:08,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:08,803 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] [2020-12-22 09:41:09,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 09:41:09,017 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:09,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:09,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1746725351, now seen corresponding path program 1 times [2020-12-22 09:41:09,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:09,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264015262] [2020-12-22 09:41:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:09,075 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 09:41:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264015262] [2020-12-22 09:41:09,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:09,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:41:09,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958584443] [2020-12-22 09:41:09,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:09,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:09,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:09,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:09,080 INFO L87 Difference]: Start difference. First operand 6829 states and 9609 transitions. Second operand 3 states. [2020-12-22 09:41:15,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:15,360 INFO L93 Difference]: Finished difference Result 8333 states and 12482 transitions. [2020-12-22 09:41:15,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:15,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:41:15,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:15,381 INFO L225 Difference]: With dead ends: 8333 [2020-12-22 09:41:15,381 INFO L226 Difference]: Without dead ends: 7580 [2020-12-22 09:41:15,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:15,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7580 states. [2020-12-22 09:41:15,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7580 to 7580. [2020-12-22 09:41:15,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7580 states. [2020-12-22 09:41:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7580 states to 7580 states and 10588 transitions. [2020-12-22 09:41:15,822 INFO L78 Accepts]: Start accepts. Automaton has 7580 states and 10588 transitions. Word has length 67 [2020-12-22 09:41:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:15,822 INFO L481 AbstractCegarLoop]: Abstraction has 7580 states and 10588 transitions. [2020-12-22 09:41:15,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 7580 states and 10588 transitions. [2020-12-22 09:41:15,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:41:15,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:15,824 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:15,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:41:15,824 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:15,825 INFO L82 PathProgramCache]: Analyzing trace with hash -44763738, now seen corresponding path program 1 times [2020-12-22 09:41:15,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:15,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449608474] [2020-12-22 09:41:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:16,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449608474] [2020-12-22 09:41:16,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992122161] [2020-12-22 09:41:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:41:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:16,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:41:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:16,289 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:16,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:16,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:41:16,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128332312] [2020-12-22 09:41:16,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:41:16,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:16,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:41:16,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:41:16,623 INFO L87 Difference]: Start difference. First operand 7580 states and 10588 transitions. Second operand 17 states. [2020-12-22 09:41:20,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:20,121 INFO L93 Difference]: Finished difference Result 31451 states and 42646 transitions. [2020-12-22 09:41:20,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:41:20,121 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:41:20,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:20,186 INFO L225 Difference]: With dead ends: 31451 [2020-12-22 09:41:20,186 INFO L226 Difference]: Without dead ends: 26540 [2020-12-22 09:41:20,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:41:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26540 states. [2020-12-22 09:41:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26540 to 15253. [2020-12-22 09:41:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15253 states. [2020-12-22 09:41:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15253 states to 15253 states and 20874 transitions. [2020-12-22 09:41:21,201 INFO L78 Accepts]: Start accepts. Automaton has 15253 states and 20874 transitions. Word has length 67 [2020-12-22 09:41:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:21,202 INFO L481 AbstractCegarLoop]: Abstraction has 15253 states and 20874 transitions. [2020-12-22 09:41:21,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:41:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 15253 states and 20874 transitions. [2020-12-22 09:41:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:41:21,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:21,204 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:21,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:41:21,408 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:21,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2066736808, now seen corresponding path program 1 times [2020-12-22 09:41:21,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:21,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250990469] [2020-12-22 09:41:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:21,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250990469] [2020-12-22 09:41:21,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833960999] [2020-12-22 09:41:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:41:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:21,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:41:21,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:22,024 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:22,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:22,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:41:22,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125239971] [2020-12-22 09:41:22,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:41:22,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:22,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:41:22,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:41:22,341 INFO L87 Difference]: Start difference. First operand 15253 states and 20874 transitions. Second operand 17 states. [2020-12-22 09:41:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:28,978 INFO L93 Difference]: Finished difference Result 76692 states and 103530 transitions. [2020-12-22 09:41:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:41:28,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:41:28,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:29,130 INFO L225 Difference]: With dead ends: 76692 [2020-12-22 09:41:29,130 INFO L226 Difference]: Without dead ends: 65262 [2020-12-22 09:41:29,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=591, Invalid=1665, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:41:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65262 states. [2020-12-22 09:41:32,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65262 to 33304. [2020-12-22 09:41:32,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33304 states. [2020-12-22 09:41:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33304 states to 33304 states and 45142 transitions. [2020-12-22 09:41:32,760 INFO L78 Accepts]: Start accepts. Automaton has 33304 states and 45142 transitions. Word has length 67 [2020-12-22 09:41:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:32,761 INFO L481 AbstractCegarLoop]: Abstraction has 33304 states and 45142 transitions. [2020-12-22 09:41:32,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:41:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 33304 states and 45142 transitions. [2020-12-22 09:41:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:41:32,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:32,763 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:32,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:41:32,964 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:32,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:32,966 INFO L82 PathProgramCache]: Analyzing trace with hash -848751410, now seen corresponding path program 1 times [2020-12-22 09:41:32,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:32,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949363334] [2020-12-22 09:41:32,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:33,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949363334] [2020-12-22 09:41:33,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:33,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:33,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223911827] [2020-12-22 09:41:33,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:33,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:33,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:33,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:33,023 INFO L87 Difference]: Start difference. First operand 33304 states and 45142 transitions. Second operand 3 states. [2020-12-22 09:41:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:34,501 INFO L93 Difference]: Finished difference Result 48522 states and 65751 transitions. [2020-12-22 09:41:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:34,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:41:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:34,537 INFO L225 Difference]: With dead ends: 48522 [2020-12-22 09:41:34,538 INFO L226 Difference]: Without dead ends: 20010 [2020-12-22 09:41:34,575 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 09:41:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20010 states. [2020-12-22 09:41:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20010 to 19774. [2020-12-22 09:41:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19774 states. [2020-12-22 09:41:36,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19774 states to 19774 states and 26304 transitions. [2020-12-22 09:41:36,365 INFO L78 Accepts]: Start accepts. Automaton has 19774 states and 26304 transitions. Word has length 67 [2020-12-22 09:41:36,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:36,365 INFO L481 AbstractCegarLoop]: Abstraction has 19774 states and 26304 transitions. [2020-12-22 09:41:36,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 19774 states and 26304 transitions. [2020-12-22 09:41:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:41:36,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:36,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:36,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:41:36,368 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2096259026, now seen corresponding path program 1 times [2020-12-22 09:41:36,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:36,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262235528] [2020-12-22 09:41:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:36,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262235528] [2020-12-22 09:41:36,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:36,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:36,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418674319] [2020-12-22 09:41:36,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:36,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:36,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:36,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:36,424 INFO L87 Difference]: Start difference. First operand 19774 states and 26304 transitions. Second operand 3 states. [2020-12-22 09:41:37,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:37,337 INFO L93 Difference]: Finished difference Result 29676 states and 39435 transitions. [2020-12-22 09:41:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:37,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:41:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:37,365 INFO L225 Difference]: With dead ends: 29676 [2020-12-22 09:41:37,366 INFO L226 Difference]: Without dead ends: 13664 [2020-12-22 09:41:37,380 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 09:41:37,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13664 states. [2020-12-22 09:41:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13664 to 13662. [2020-12-22 09:41:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13662 states. [2020-12-22 09:41:38,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13662 states to 13662 states and 17927 transitions. [2020-12-22 09:41:38,313 INFO L78 Accepts]: Start accepts. Automaton has 13662 states and 17927 transitions. Word has length 67 [2020-12-22 09:41:38,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:38,313 INFO L481 AbstractCegarLoop]: Abstraction has 13662 states and 17927 transitions. [2020-12-22 09:41:38,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:38,313 INFO L276 IsEmpty]: Start isEmpty. Operand 13662 states and 17927 transitions. [2020-12-22 09:41:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:41:38,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:38,315 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:38,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:41:38,316 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:38,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:38,316 INFO L82 PathProgramCache]: Analyzing trace with hash 873869654, now seen corresponding path program 1 times [2020-12-22 09:41:38,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:38,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539008085] [2020-12-22 09:41:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:41:38,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539008085] [2020-12-22 09:41:38,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:38,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:38,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622169104] [2020-12-22 09:41:38,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:38,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:38,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:38,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:38,403 INFO L87 Difference]: Start difference. First operand 13662 states and 17927 transitions. Second operand 6 states. [2020-12-22 09:41:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:39,665 INFO L93 Difference]: Finished difference Result 23425 states and 30479 transitions. [2020-12-22 09:41:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:39,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:41:39,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:39,679 INFO L225 Difference]: With dead ends: 23425 [2020-12-22 09:41:39,679 INFO L226 Difference]: Without dead ends: 11373 [2020-12-22 09:41:39,688 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 09:41:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2020-12-22 09:41:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 11373. [2020-12-22 09:41:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11373 states. [2020-12-22 09:41:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11373 states to 11373 states and 14808 transitions. [2020-12-22 09:41:40,587 INFO L78 Accepts]: Start accepts. Automaton has 11373 states and 14808 transitions. Word has length 67 [2020-12-22 09:41:40,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:40,587 INFO L481 AbstractCegarLoop]: Abstraction has 11373 states and 14808 transitions. [2020-12-22 09:41:40,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:40,588 INFO L276 IsEmpty]: Start isEmpty. Operand 11373 states and 14808 transitions. [2020-12-22 09:41:40,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:41:40,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:40,589 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:40,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:41:40,589 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:40,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:40,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1198871190, now seen corresponding path program 1 times [2020-12-22 09:41:40,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:40,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207505665] [2020-12-22 09:41:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:41:40,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207505665] [2020-12-22 09:41:40,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:40,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:40,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984376320] [2020-12-22 09:41:40,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:40,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:40,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:40,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:40,660 INFO L87 Difference]: Start difference. First operand 11373 states and 14808 transitions. Second operand 6 states. [2020-12-22 09:41:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:41,716 INFO L93 Difference]: Finished difference Result 18542 states and 23871 transitions. [2020-12-22 09:41:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:41,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:41:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:41,731 INFO L225 Difference]: With dead ends: 18542 [2020-12-22 09:41:41,731 INFO L226 Difference]: Without dead ends: 8813 [2020-12-22 09:41:41,740 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 09:41:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8813 states. [2020-12-22 09:41:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8813 to 8813. [2020-12-22 09:41:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8813 states. [2020-12-22 09:41:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8813 states to 8813 states and 11460 transitions. [2020-12-22 09:41:42,789 INFO L78 Accepts]: Start accepts. Automaton has 8813 states and 11460 transitions. Word has length 67 [2020-12-22 09:41:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:42,789 INFO L481 AbstractCegarLoop]: Abstraction has 8813 states and 11460 transitions. [2020-12-22 09:41:42,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 8813 states and 11460 transitions. [2020-12-22 09:41:42,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:41:42,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:42,794 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:42,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:41:42,794 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:42,795 INFO L82 PathProgramCache]: Analyzing trace with hash -49807498, now seen corresponding path program 1 times [2020-12-22 09:41:42,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:42,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840148517] [2020-12-22 09:41:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:41:42,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840148517] [2020-12-22 09:41:42,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:42,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:42,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670966782] [2020-12-22 09:41:42,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:42,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:42,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:42,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:42,873 INFO L87 Difference]: Start difference. First operand 8813 states and 11460 transitions. Second operand 6 states. [2020-12-22 09:41:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:43,854 INFO L93 Difference]: Finished difference Result 14363 states and 18405 transitions. [2020-12-22 09:41:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:43,855 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:41:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:43,869 INFO L225 Difference]: With dead ends: 14363 [2020-12-22 09:41:43,870 INFO L226 Difference]: Without dead ends: 7116 [2020-12-22 09:41:43,880 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 09:41:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7116 states. [2020-12-22 09:41:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7116 to 7116. [2020-12-22 09:41:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7116 states. [2020-12-22 09:41:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 9314 transitions. [2020-12-22 09:41:44,767 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 9314 transitions. Word has length 67 [2020-12-22 09:41:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:44,767 INFO L481 AbstractCegarLoop]: Abstraction has 7116 states and 9314 transitions. [2020-12-22 09:41:44,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 9314 transitions. [2020-12-22 09:41:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:41:44,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:44,768 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:44,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:41:44,768 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:44,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1937529655, now seen corresponding path program 1 times [2020-12-22 09:41:44,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:44,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240674642] [2020-12-22 09:41:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:45,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240674642] [2020-12-22 09:41:45,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295158693] [2020-12-22 09:41:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:41:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:45,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 09:41:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:46,141 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:41:46,161 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:41:46,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:41:46,168 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:41:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:46,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:46,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:41:46,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287392784] [2020-12-22 09:41:46,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:41:46,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:46,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:41:46,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:41:46,636 INFO L87 Difference]: Start difference. First operand 7116 states and 9314 transitions. Second operand 26 states. [2020-12-22 09:41:47,514 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 09:41:47,732 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-12-22 09:41:48,019 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-12-22 09:41:48,283 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 09:41:48,543 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:41:48,816 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:41:49,097 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:41:49,388 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-12-22 09:41:49,705 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:41:49,932 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:41:50,114 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:41:50,320 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 09:41:50,860 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-12-22 09:41:51,143 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-22 09:41:51,359 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-22 09:41:51,575 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-12-22 09:41:51,936 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-12-22 09:41:52,274 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-22 09:41:52,639 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:41:52,816 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-22 09:41:52,984 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:41:53,319 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 09:41:54,115 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-12-22 09:41:54,565 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:41:54,929 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-12-22 09:41:55,181 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-12-22 09:41:55,481 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 09:41:55,725 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:41:55,955 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-12-22 09:41:56,236 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:41:56,415 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 09:41:56,846 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:41:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:58,872 INFO L93 Difference]: Finished difference Result 13247 states and 17007 transitions. [2020-12-22 09:41:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 09:41:58,872 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2020-12-22 09:41:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:58,882 INFO L225 Difference]: With dead ends: 13247 [2020-12-22 09:41:58,882 INFO L226 Difference]: Without dead ends: 10342 [2020-12-22 09:41:58,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1297, Invalid=6359, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 09:41:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10342 states. [2020-12-22 09:41:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10342 to 6278. [2020-12-22 09:41:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-12-22 09:41:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 8333 transitions. [2020-12-22 09:41:59,400 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 8333 transitions. Word has length 68 [2020-12-22 09:41:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:59,400 INFO L481 AbstractCegarLoop]: Abstraction has 6278 states and 8333 transitions. [2020-12-22 09:41:59,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:41:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 8333 transitions. [2020-12-22 09:41:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:41:59,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:59,401 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:59,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:41:59,602 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:59,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:59,603 INFO L82 PathProgramCache]: Analyzing trace with hash 75217277, now seen corresponding path program 1 times [2020-12-22 09:41:59,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:59,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112772620] [2020-12-22 09:41:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:00,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112772620] [2020-12-22 09:42:00,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093566650] [2020-12-22 09:42:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:00,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 09:42:00,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:02,811 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-12-22 09:42:02,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:02,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:42:03,410 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44