/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/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:40:56,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:40:56,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:40:56,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:40:56,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:40:56,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:40:56,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:40:56,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:40:56,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:40:56,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:40:56,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:40:56,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:40:56,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:40:56,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:40:56,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:40:56,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:40:56,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:40:56,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:40:56,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:40:56,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:40:56,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:40:56,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:40:56,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:40:56,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:40:56,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:40:56,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:40:56,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:40:56,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:40:56,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:40:56,500 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:40:56,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:40:56,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:40:56,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:40:56,502 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:40:56,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:40:56,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:40:56,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:40:56,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:40:56,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:40:56,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:40:56,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:40:56,506 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:40:56,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:40:56,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:40:56,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:40:56,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:40:56,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:40:56,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:40:56,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:40:56,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:40:56,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:40:56,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:40:56,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:40:56,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:40:56,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:40:56,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:40:56,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:40:56,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:40:56,950 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:40:56,951 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:40:56,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c [2020-12-22 07:40:57,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/901c2dfb2/7084de3e7ecd422a9960ab17fe63b974/FLAGfb879c858 [2020-12-22 07:40:57,795 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:40:57,796 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c [2020-12-22 07:40:57,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/901c2dfb2/7084de3e7ecd422a9960ab17fe63b974/FLAGfb879c858 [2020-12-22 07:40:58,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/901c2dfb2/7084de3e7ecd422a9960ab17fe63b974 [2020-12-22 07:40:58,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:40:58,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:40:58,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:40:58,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:40:58,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:40:58,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@649ae089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58, skipping insertion in model container [2020-12-22 07:40:58,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:40:58,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:40:58,479 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/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c[14371,14384] [2020-12-22 07:40:58,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:40:58,502 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:40:58,566 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/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c[14371,14384] [2020-12-22 07:40:58,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:40:58,586 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:40:58,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58 WrapperNode [2020-12-22 07:40:58,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:40:58,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:40:58,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:40:58,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:40:58,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:40:58,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:40:58,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:40:58,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:40:58,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:40:58,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:40:58,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:40:58,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:40:58,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (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 07:40:58,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:40:58,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:40:58,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:40:58,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:40:59,657 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:40:59,658 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:40:59,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:40:59 BoogieIcfgContainer [2020-12-22 07:40:59,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:40:59,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:40:59,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:40:59,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:40:59,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:40:58" (1/3) ... [2020-12-22 07:40:59,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c81758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:40:59, skipping insertion in model container [2020-12-22 07:40:59,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (2/3) ... [2020-12-22 07:40:59,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c81758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:40:59, skipping insertion in model container [2020-12-22 07:40:59,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:40:59" (3/3) ... [2020-12-22 07:40:59,670 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c [2020-12-22 07:40:59,677 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:40:59,683 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:40:59,705 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:40:59,740 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:40:59,741 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:40:59,741 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:40:59,741 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:40:59,741 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:40:59,741 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:40:59,742 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:40:59,742 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:40:59,765 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states. [2020-12-22 07:40:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:40:59,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:59,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:59,777 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:59,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1418405445, now seen corresponding path program 1 times [2020-12-22 07:40:59,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:59,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894684890] [2020-12-22 07:40:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:00,127 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 07:41:00,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894684890] [2020-12-22 07:41:00,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:00,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:41:00,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670786076] [2020-12-22 07:41:00,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:41:00,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:00,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:41:00,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:41:00,157 INFO L87 Difference]: Start difference. First operand 143 states. Second operand 2 states. [2020-12-22 07:41:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:00,193 INFO L93 Difference]: Finished difference Result 227 states and 388 transitions. [2020-12-22 07:41:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:41:00,195 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:41:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:00,208 INFO L225 Difference]: With dead ends: 227 [2020-12-22 07:41:00,209 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 07:41:00,212 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 07:41:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 07:41:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-12-22 07:41:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 07:41:00,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2020-12-22 07:41:00,266 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 37 [2020-12-22 07:41:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:00,267 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2020-12-22 07:41:00,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:41:00,267 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2020-12-22 07:41:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:41:00,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:00,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:00,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:41:00,270 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:00,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:00,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2058913401, now seen corresponding path program 1 times [2020-12-22 07:41:00,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:00,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090698020] [2020-12-22 07:41:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:00,471 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 07:41:00,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090698020] [2020-12-22 07:41:00,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:00,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:00,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235737089] [2020-12-22 07:41:00,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:00,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:00,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:00,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:00,480 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand 5 states. [2020-12-22 07:41:00,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:00,626 INFO L93 Difference]: Finished difference Result 222 states and 378 transitions. [2020-12-22 07:41:00,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:41:00,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:41:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:00,632 INFO L225 Difference]: With dead ends: 222 [2020-12-22 07:41:00,633 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 07:41:00,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:41:00,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 07:41:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-12-22 07:41:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 07:41:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 211 transitions. [2020-12-22 07:41:00,663 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 211 transitions. Word has length 37 [2020-12-22 07:41:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:00,667 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 211 transitions. [2020-12-22 07:41:00,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:41:00,667 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 211 transitions. [2020-12-22 07:41:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:41:00,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:00,672 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] [2020-12-22 07:41:00,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:41:00,673 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:00,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:00,677 INFO L82 PathProgramCache]: Analyzing trace with hash -415118785, now seen corresponding path program 1 times [2020-12-22 07:41:00,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:00,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702456406] [2020-12-22 07:41:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:00,850 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 07:41:00,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702456406] [2020-12-22 07:41:00,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:00,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:00,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912421084] [2020-12-22 07:41:00,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:00,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:00,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:00,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:00,854 INFO L87 Difference]: Start difference. First operand 139 states and 211 transitions. Second operand 3 states. [2020-12-22 07:41:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:00,898 INFO L93 Difference]: Finished difference Result 287 states and 459 transitions. [2020-12-22 07:41:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:00,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:41:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:00,901 INFO L225 Difference]: With dead ends: 287 [2020-12-22 07:41:00,901 INFO L226 Difference]: Without dead ends: 208 [2020-12-22 07:41:00,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:41:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-22 07:41:00,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2020-12-22 07:41:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-22 07:41:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2020-12-22 07:41:00,916 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 66 [2020-12-22 07:41:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:00,917 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2020-12-22 07:41:00,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:00,917 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2020-12-22 07:41:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:41:00,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:00,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:00,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:41:00,920 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:00,920 INFO L82 PathProgramCache]: Analyzing trace with hash 928134868, now seen corresponding path program 1 times [2020-12-22 07:41:00,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:00,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334791854] [2020-12-22 07:41:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:01,062 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 07:41:01,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334791854] [2020-12-22 07:41:01,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:01,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:01,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65306064] [2020-12-22 07:41:01,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:01,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:01,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:01,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:01,067 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 3 states. [2020-12-22 07:41:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:01,107 INFO L93 Difference]: Finished difference Result 482 states and 776 transitions. [2020-12-22 07:41:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:01,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:41:01,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:01,112 INFO L225 Difference]: With dead ends: 482 [2020-12-22 07:41:01,112 INFO L226 Difference]: Without dead ends: 336 [2020-12-22 07:41:01,117 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 07:41:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-22 07:41:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 334. [2020-12-22 07:41:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-22 07:41:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 531 transitions. [2020-12-22 07:41:01,157 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 531 transitions. Word has length 68 [2020-12-22 07:41:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:01,158 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 531 transitions. [2020-12-22 07:41:01,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:01,158 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 531 transitions. [2020-12-22 07:41:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:41:01,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:01,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:01,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:41:01,165 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:01,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1295175881, now seen corresponding path program 1 times [2020-12-22 07:41:01,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:01,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980888117] [2020-12-22 07:41:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:01,316 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 07:41:01,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980888117] [2020-12-22 07:41:01,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:01,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:01,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989991673] [2020-12-22 07:41:01,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:01,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:01,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:01,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:01,320 INFO L87 Difference]: Start difference. First operand 334 states and 531 transitions. Second operand 3 states. [2020-12-22 07:41:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:01,356 INFO L93 Difference]: Finished difference Result 850 states and 1381 transitions. [2020-12-22 07:41:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:01,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:41:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:01,361 INFO L225 Difference]: With dead ends: 850 [2020-12-22 07:41:01,361 INFO L226 Difference]: Without dead ends: 576 [2020-12-22 07:41:01,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:41:01,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-12-22 07:41:01,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-12-22 07:41:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-12-22 07:41:01,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 923 transitions. [2020-12-22 07:41:01,390 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 923 transitions. Word has length 70 [2020-12-22 07:41:01,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:01,391 INFO L481 AbstractCegarLoop]: Abstraction has 574 states and 923 transitions. [2020-12-22 07:41:01,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:01,392 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 923 transitions. [2020-12-22 07:41:01,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:41:01,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:01,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:01,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:41:01,397 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:01,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:01,398 INFO L82 PathProgramCache]: Analyzing trace with hash -367652834, now seen corresponding path program 1 times [2020-12-22 07:41:01,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:01,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089535538] [2020-12-22 07:41:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:01,591 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 07:41:01,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089535538] [2020-12-22 07:41:01,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:01,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:01,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843000246] [2020-12-22 07:41:01,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:01,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:01,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:01,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:01,596 INFO L87 Difference]: Start difference. First operand 574 states and 923 transitions. Second operand 5 states. [2020-12-22 07:41:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:01,803 INFO L93 Difference]: Finished difference Result 2176 states and 3592 transitions. [2020-12-22 07:41:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:41:01,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:41:01,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:01,817 INFO L225 Difference]: With dead ends: 2176 [2020-12-22 07:41:01,817 INFO L226 Difference]: Without dead ends: 1662 [2020-12-22 07:41:01,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:41:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2020-12-22 07:41:01,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1023. [2020-12-22 07:41:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2020-12-22 07:41:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1661 transitions. [2020-12-22 07:41:01,874 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1661 transitions. Word has length 72 [2020-12-22 07:41:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:01,875 INFO L481 AbstractCegarLoop]: Abstraction has 1023 states and 1661 transitions. [2020-12-22 07:41:01,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:41:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1661 transitions. [2020-12-22 07:41:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 07:41:01,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:01,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:01,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:41:01,879 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:01,880 INFO L82 PathProgramCache]: Analyzing trace with hash -435168554, now seen corresponding path program 1 times [2020-12-22 07:41:01,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:01,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164192680] [2020-12-22 07:41:01,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:02,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164192680] [2020-12-22 07:41:02,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:02,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:02,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674192418] [2020-12-22 07:41:02,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:02,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:02,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:02,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:02,027 INFO L87 Difference]: Start difference. First operand 1023 states and 1661 transitions. Second operand 4 states. [2020-12-22 07:41:02,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:02,155 INFO L93 Difference]: Finished difference Result 2972 states and 4898 transitions. [2020-12-22 07:41:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:02,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 07:41:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:02,166 INFO L225 Difference]: With dead ends: 2972 [2020-12-22 07:41:02,167 INFO L226 Difference]: Without dead ends: 2009 [2020-12-22 07:41:02,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2020-12-22 07:41:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1507. [2020-12-22 07:41:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1507 states. [2020-12-22 07:41:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2459 transitions. [2020-12-22 07:41:02,238 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2459 transitions. Word has length 73 [2020-12-22 07:41:02,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:02,238 INFO L481 AbstractCegarLoop]: Abstraction has 1507 states and 2459 transitions. [2020-12-22 07:41:02,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:02,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2459 transitions. [2020-12-22 07:41:02,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:41:02,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:02,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:02,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:41:02,244 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:02,245 INFO L82 PathProgramCache]: Analyzing trace with hash 152415701, now seen corresponding path program 1 times [2020-12-22 07:41:02,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:02,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214504550] [2020-12-22 07:41:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:02,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214504550] [2020-12-22 07:41:02,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:02,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:02,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239284625] [2020-12-22 07:41:02,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:02,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:02,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:02,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:02,325 INFO L87 Difference]: Start difference. First operand 1507 states and 2459 transitions. Second operand 3 states. [2020-12-22 07:41:02,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:02,396 INFO L93 Difference]: Finished difference Result 2973 states and 4868 transitions. [2020-12-22 07:41:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:02,397 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:41:02,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:02,408 INFO L225 Difference]: With dead ends: 2973 [2020-12-22 07:41:02,408 INFO L226 Difference]: Without dead ends: 2147 [2020-12-22 07:41:02,410 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 07:41:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2020-12-22 07:41:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 2145. [2020-12-22 07:41:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2145 states. [2020-12-22 07:41:02,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 3484 transitions. [2020-12-22 07:41:02,527 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 3484 transitions. Word has length 74 [2020-12-22 07:41:02,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:02,528 INFO L481 AbstractCegarLoop]: Abstraction has 2145 states and 3484 transitions. [2020-12-22 07:41:02,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:02,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 3484 transitions. [2020-12-22 07:41:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:41:02,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:02,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:02,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:41:02,533 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:02,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:02,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1935815765, now seen corresponding path program 1 times [2020-12-22 07:41:02,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:02,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877358139] [2020-12-22 07:41:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:02,637 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 07:41:02,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877358139] [2020-12-22 07:41:02,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:02,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:02,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719418521] [2020-12-22 07:41:02,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:02,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:02,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:02,647 INFO L87 Difference]: Start difference. First operand 2145 states and 3484 transitions. Second operand 4 states. [2020-12-22 07:41:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:02,841 INFO L93 Difference]: Finished difference Result 6648 states and 10865 transitions. [2020-12-22 07:41:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:02,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:41:02,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:02,866 INFO L225 Difference]: With dead ends: 6648 [2020-12-22 07:41:02,866 INFO L226 Difference]: Without dead ends: 4593 [2020-12-22 07:41:02,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:02,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2020-12-22 07:41:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3357. [2020-12-22 07:41:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3357 states. [2020-12-22 07:41:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3357 states to 3357 states and 5442 transitions. [2020-12-22 07:41:03,058 INFO L78 Accepts]: Start accepts. Automaton has 3357 states and 5442 transitions. Word has length 74 [2020-12-22 07:41:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:03,059 INFO L481 AbstractCegarLoop]: Abstraction has 3357 states and 5442 transitions. [2020-12-22 07:41:03,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3357 states and 5442 transitions. [2020-12-22 07:41:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:41:03,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:03,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:03,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:41:03,061 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:03,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:03,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2130170379, now seen corresponding path program 1 times [2020-12-22 07:41:03,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:03,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839373489] [2020-12-22 07:41:03,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:03,136 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 07:41:03,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839373489] [2020-12-22 07:41:03,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:03,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:03,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166789761] [2020-12-22 07:41:03,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:03,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:03,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:03,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:03,142 INFO L87 Difference]: Start difference. First operand 3357 states and 5442 transitions. Second operand 3 states. [2020-12-22 07:41:03,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:03,280 INFO L93 Difference]: Finished difference Result 6689 states and 10862 transitions. [2020-12-22 07:41:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:03,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:41:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:03,311 INFO L225 Difference]: With dead ends: 6689 [2020-12-22 07:41:03,312 INFO L226 Difference]: Without dead ends: 4777 [2020-12-22 07:41:03,317 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 07:41:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2020-12-22 07:41:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4775. [2020-12-22 07:41:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4775 states. [2020-12-22 07:41:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 7690 transitions. [2020-12-22 07:41:03,578 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 7690 transitions. Word has length 74 [2020-12-22 07:41:03,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:03,579 INFO L481 AbstractCegarLoop]: Abstraction has 4775 states and 7690 transitions. [2020-12-22 07:41:03,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 7690 transitions. [2020-12-22 07:41:03,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:41:03,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:03,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:03,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:41:03,581 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:03,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:03,582 INFO L82 PathProgramCache]: Analyzing trace with hash 339461557, now seen corresponding path program 1 times [2020-12-22 07:41:03,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:03,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592444525] [2020-12-22 07:41:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:03,634 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 07:41:03,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592444525] [2020-12-22 07:41:03,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:03,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:03,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080332134] [2020-12-22 07:41:03,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:03,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:03,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:03,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:03,637 INFO L87 Difference]: Start difference. First operand 4775 states and 7690 transitions. Second operand 3 states. [2020-12-22 07:41:03,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:03,889 INFO L93 Difference]: Finished difference Result 10486 states and 17043 transitions. [2020-12-22 07:41:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:03,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:41:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:03,935 INFO L225 Difference]: With dead ends: 10486 [2020-12-22 07:41:03,935 INFO L226 Difference]: Without dead ends: 7079 [2020-12-22 07:41:03,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:03,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7079 states. [2020-12-22 07:41:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7079 to 7077. [2020-12-22 07:41:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7077 states. [2020-12-22 07:41:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 11375 transitions. [2020-12-22 07:41:04,408 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 11375 transitions. Word has length 74 [2020-12-22 07:41:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:04,409 INFO L481 AbstractCegarLoop]: Abstraction has 7077 states and 11375 transitions. [2020-12-22 07:41:04,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 11375 transitions. [2020-12-22 07:41:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:41:04,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:04,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:04,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:41:04,411 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:04,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1704077331, now seen corresponding path program 1 times [2020-12-22 07:41:04,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:04,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798948783] [2020-12-22 07:41:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:04,549 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 07:41:04,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798948783] [2020-12-22 07:41:04,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:04,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:04,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250632888] [2020-12-22 07:41:04,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:04,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:04,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:04,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:04,552 INFO L87 Difference]: Start difference. First operand 7077 states and 11375 transitions. Second operand 4 states. [2020-12-22 07:41:05,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:05,148 INFO L93 Difference]: Finished difference Result 22184 states and 35744 transitions. [2020-12-22 07:41:05,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:05,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 07:41:05,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:05,210 INFO L225 Difference]: With dead ends: 22184 [2020-12-22 07:41:05,210 INFO L226 Difference]: Without dead ends: 15193 [2020-12-22 07:41:05,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:05,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15193 states. [2020-12-22 07:41:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15193 to 11092. [2020-12-22 07:41:05,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11092 states. [2020-12-22 07:41:05,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11092 states to 11092 states and 17724 transitions. [2020-12-22 07:41:05,830 INFO L78 Accepts]: Start accepts. Automaton has 11092 states and 17724 transitions. Word has length 75 [2020-12-22 07:41:05,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:05,831 INFO L481 AbstractCegarLoop]: Abstraction has 11092 states and 17724 transitions. [2020-12-22 07:41:05,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:05,831 INFO L276 IsEmpty]: Start isEmpty. Operand 11092 states and 17724 transitions. [2020-12-22 07:41:05,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:41:05,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:05,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:05,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:41:05,833 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:05,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:05,834 INFO L82 PathProgramCache]: Analyzing trace with hash 931672261, now seen corresponding path program 1 times [2020-12-22 07:41:05,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:05,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458313581] [2020-12-22 07:41:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:06,024 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 07:41:06,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458313581] [2020-12-22 07:41:06,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:06,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:06,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001678837] [2020-12-22 07:41:06,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:06,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:06,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:06,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:06,027 INFO L87 Difference]: Start difference. First operand 11092 states and 17724 transitions. Second operand 4 states. [2020-12-22 07:41:06,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:06,938 INFO L93 Difference]: Finished difference Result 32771 states and 52300 transitions. [2020-12-22 07:41:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:06,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-12-22 07:41:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:07,009 INFO L225 Difference]: With dead ends: 32771 [2020-12-22 07:41:07,010 INFO L226 Difference]: Without dead ends: 21688 [2020-12-22 07:41:07,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:07,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21688 states. [2020-12-22 07:41:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21688 to 21686. [2020-12-22 07:41:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21686 states. [2020-12-22 07:41:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21686 states to 21686 states and 34364 transitions. [2020-12-22 07:41:08,218 INFO L78 Accepts]: Start accepts. Automaton has 21686 states and 34364 transitions. Word has length 77 [2020-12-22 07:41:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:08,218 INFO L481 AbstractCegarLoop]: Abstraction has 21686 states and 34364 transitions. [2020-12-22 07:41:08,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 21686 states and 34364 transitions. [2020-12-22 07:41:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:41:08,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:08,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:08,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:41:08,222 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:08,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:08,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1466579386, now seen corresponding path program 1 times [2020-12-22 07:41:08,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:08,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051899056] [2020-12-22 07:41:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:08,285 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 07:41:08,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051899056] [2020-12-22 07:41:08,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:08,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:08,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549912164] [2020-12-22 07:41:08,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:08,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:08,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:08,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:08,288 INFO L87 Difference]: Start difference. First operand 21686 states and 34364 transitions. Second operand 3 states. [2020-12-22 07:41:09,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:09,557 INFO L93 Difference]: Finished difference Result 52581 states and 83824 transitions. [2020-12-22 07:41:09,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:09,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:41:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:09,698 INFO L225 Difference]: With dead ends: 52581 [2020-12-22 07:41:09,698 INFO L226 Difference]: Without dead ends: 31024 [2020-12-22 07:41:09,729 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 07:41:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31024 states. [2020-12-22 07:41:11,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31024 to 30112. [2020-12-22 07:41:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30112 states. [2020-12-22 07:41:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30112 states to 30112 states and 47587 transitions. [2020-12-22 07:41:11,387 INFO L78 Accepts]: Start accepts. Automaton has 30112 states and 47587 transitions. Word has length 78 [2020-12-22 07:41:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:11,388 INFO L481 AbstractCegarLoop]: Abstraction has 30112 states and 47587 transitions. [2020-12-22 07:41:11,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 30112 states and 47587 transitions. [2020-12-22 07:41:11,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:41:11,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:11,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:11,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:41:11,390 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:11,390 INFO L82 PathProgramCache]: Analyzing trace with hash 295226641, now seen corresponding path program 1 times [2020-12-22 07:41:11,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:11,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252520899] [2020-12-22 07:41:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:11,422 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 07:41:11,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252520899] [2020-12-22 07:41:11,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:11,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:11,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909445663] [2020-12-22 07:41:11,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:11,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:11,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:11,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:11,425 INFO L87 Difference]: Start difference. First operand 30112 states and 47587 transitions. Second operand 3 states. [2020-12-22 07:41:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:13,585 INFO L93 Difference]: Finished difference Result 90298 states and 142699 transitions. [2020-12-22 07:41:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:13,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:41:13,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:13,797 INFO L225 Difference]: With dead ends: 90298 [2020-12-22 07:41:13,798 INFO L226 Difference]: Without dead ends: 60214 [2020-12-22 07:41:13,848 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 07:41:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60214 states. [2020-12-22 07:41:15,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60214 to 30114. [2020-12-22 07:41:15,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30114 states. [2020-12-22 07:41:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30114 states to 30114 states and 47589 transitions. [2020-12-22 07:41:15,550 INFO L78 Accepts]: Start accepts. Automaton has 30114 states and 47589 transitions. Word has length 78 [2020-12-22 07:41:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:15,550 INFO L481 AbstractCegarLoop]: Abstraction has 30114 states and 47589 transitions. [2020-12-22 07:41:15,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 30114 states and 47589 transitions. [2020-12-22 07:41:15,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:41:15,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:15,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:15,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:41:15,552 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:15,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:15,552 INFO L82 PathProgramCache]: Analyzing trace with hash -57061967, now seen corresponding path program 1 times [2020-12-22 07:41:15,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:15,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820992088] [2020-12-22 07:41:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:15,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820992088] [2020-12-22 07:41:15,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:15,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:15,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578944069] [2020-12-22 07:41:15,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:15,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:15,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:15,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:15,645 INFO L87 Difference]: Start difference. First operand 30114 states and 47589 transitions. Second operand 4 states. [2020-12-22 07:41:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:17,355 INFO L93 Difference]: Finished difference Result 88984 states and 140445 transitions. [2020-12-22 07:41:17,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:17,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-12-22 07:41:17,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:17,520 INFO L225 Difference]: With dead ends: 88984 [2020-12-22 07:41:17,521 INFO L226 Difference]: Without dead ends: 58900 [2020-12-22 07:41:17,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:17,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58900 states. [2020-12-22 07:41:19,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58900 to 58898. [2020-12-22 07:41:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58898 states. [2020-12-22 07:41:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58898 states to 58898 states and 92344 transitions. [2020-12-22 07:41:19,657 INFO L78 Accepts]: Start accepts. Automaton has 58898 states and 92344 transitions. Word has length 79 [2020-12-22 07:41:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:19,657 INFO L481 AbstractCegarLoop]: Abstraction has 58898 states and 92344 transitions. [2020-12-22 07:41:19,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 58898 states and 92344 transitions. [2020-12-22 07:41:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:41:19,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:19,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:19,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:41:19,660 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:19,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:19,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1163177193, now seen corresponding path program 1 times [2020-12-22 07:41:19,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:19,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430583493] [2020-12-22 07:41:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:19,711 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 07:41:19,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430583493] [2020-12-22 07:41:19,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:19,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:19,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824853370] [2020-12-22 07:41:19,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:19,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:19,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:19,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:19,713 INFO L87 Difference]: Start difference. First operand 58898 states and 92344 transitions. Second operand 3 states. [2020-12-22 07:41:22,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:22,615 INFO L93 Difference]: Finished difference Result 142466 states and 224208 transitions. [2020-12-22 07:41:22,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:22,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:41:22,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:22,818 INFO L225 Difference]: With dead ends: 142466 [2020-12-22 07:41:22,819 INFO L226 Difference]: Without dead ends: 83848 [2020-12-22 07:41:22,948 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 07:41:23,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83848 states. [2020-12-22 07:41:25,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83848 to 81542. [2020-12-22 07:41:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81542 states. [2020-12-22 07:41:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81542 states to 81542 states and 127246 transitions. [2020-12-22 07:41:26,226 INFO L78 Accepts]: Start accepts. Automaton has 81542 states and 127246 transitions. Word has length 80 [2020-12-22 07:41:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:26,226 INFO L481 AbstractCegarLoop]: Abstraction has 81542 states and 127246 transitions. [2020-12-22 07:41:26,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 81542 states and 127246 transitions. [2020-12-22 07:41:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:41:26,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:26,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:26,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:41:26,229 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:26,230 INFO L82 PathProgramCache]: Analyzing trace with hash -544448643, now seen corresponding path program 1 times [2020-12-22 07:41:26,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:26,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143330360] [2020-12-22 07:41:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:26,282 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 07:41:26,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143330360] [2020-12-22 07:41:26,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:26,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:26,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655957391] [2020-12-22 07:41:26,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:26,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:26,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:26,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:26,286 INFO L87 Difference]: Start difference. First operand 81542 states and 127246 transitions. Second operand 3 states. [2020-12-22 07:41:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:30,882 INFO L93 Difference]: Finished difference Result 244550 states and 381618 transitions. [2020-12-22 07:41:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:30,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:41:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:31,407 INFO L225 Difference]: With dead ends: 244550 [2020-12-22 07:41:31,407 INFO L226 Difference]: Without dead ends: 163052 [2020-12-22 07:41:31,501 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 07:41:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163052 states. [2020-12-22 07:41:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163052 to 81546. [2020-12-22 07:41:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81546 states. [2020-12-22 07:41:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81546 states to 81546 states and 127250 transitions. [2020-12-22 07:41:35,330 INFO L78 Accepts]: Start accepts. Automaton has 81546 states and 127250 transitions. Word has length 80 [2020-12-22 07:41:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:35,330 INFO L481 AbstractCegarLoop]: Abstraction has 81546 states and 127250 transitions. [2020-12-22 07:41:35,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 81546 states and 127250 transitions. [2020-12-22 07:41:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:41:35,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:35,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:35,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:41:35,333 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:35,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2051256477, now seen corresponding path program 1 times [2020-12-22 07:41:35,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:35,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409782779] [2020-12-22 07:41:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:35,428 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 07:41:35,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409782779] [2020-12-22 07:41:35,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:35,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:35,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679081539] [2020-12-22 07:41:35,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:35,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:35,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:35,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:35,433 INFO L87 Difference]: Start difference. First operand 81546 states and 127250 transitions. Second operand 4 states. [2020-12-22 07:41:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:40,759 INFO L93 Difference]: Finished difference Result 240890 states and 375346 transitions. [2020-12-22 07:41:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:40,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-12-22 07:41:40,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:41,055 INFO L225 Difference]: With dead ends: 240890 [2020-12-22 07:41:41,056 INFO L226 Difference]: Without dead ends: 159392 [2020-12-22 07:41:41,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:41,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159392 states. [2020-12-22 07:41:47,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159392 to 159390. [2020-12-22 07:41:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159390 states. [2020-12-22 07:41:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159390 states to 159390 states and 246600 transitions. [2020-12-22 07:41:47,527 INFO L78 Accepts]: Start accepts. Automaton has 159390 states and 246600 transitions. Word has length 81 [2020-12-22 07:41:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:47,527 INFO L481 AbstractCegarLoop]: Abstraction has 159390 states and 246600 transitions. [2020-12-22 07:41:47,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 159390 states and 246600 transitions. [2020-12-22 07:41:47,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:41:47,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:47,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:47,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:41:47,530 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:47,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:47,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2106822348, now seen corresponding path program 1 times [2020-12-22 07:41:47,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:47,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52267794] [2020-12-22 07:41:47,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:47,588 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 07:41:47,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52267794] [2020-12-22 07:41:47,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:47,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:47,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328882041] [2020-12-22 07:41:47,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:47,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:47,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:47,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:47,590 INFO L87 Difference]: Start difference. First operand 159390 states and 246600 transitions. Second operand 3 states. [2020-12-22 07:41:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:55,384 INFO L93 Difference]: Finished difference Result 386314 states and 600650 transitions. [2020-12-22 07:41:55,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:55,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:41:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:55,852 INFO L225 Difference]: With dead ends: 386314 [2020-12-22 07:41:55,852 INFO L226 Difference]: Without dead ends: 227488 [2020-12-22 07:41:55,951 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 07:41:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227488 states. [2020-12-22 07:42:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227488 to 220286. [2020-12-22 07:42:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220286 states. [2020-12-22 07:42:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220286 states to 220286 states and 338608 transitions. [2020-12-22 07:42:05,416 INFO L78 Accepts]: Start accepts. Automaton has 220286 states and 338608 transitions. Word has length 82 [2020-12-22 07:42:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:05,416 INFO L481 AbstractCegarLoop]: Abstraction has 220286 states and 338608 transitions. [2020-12-22 07:42:05,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 220286 states and 338608 transitions. [2020-12-22 07:42:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:42:05,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:05,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:42:05,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:42:05,419 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:05,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:05,419 INFO L82 PathProgramCache]: Analyzing trace with hash -565045271, now seen corresponding path program 1 times [2020-12-22 07:42:05,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:05,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907380582] [2020-12-22 07:42:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:05,471 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 07:42:05,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907380582] [2020-12-22 07:42:05,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:05,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:42:05,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952293500] [2020-12-22 07:42:05,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:42:05,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:05,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:42:05,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:05,475 INFO L87 Difference]: Start difference. First operand 220286 states and 338608 transitions. Second operand 3 states. [2020-12-22 07:42:20,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:20,185 INFO L93 Difference]: Finished difference Result 660434 states and 1015278 transitions. [2020-12-22 07:42:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:20,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:42:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:21,324 INFO L225 Difference]: With dead ends: 660434 [2020-12-22 07:42:21,324 INFO L226 Difference]: Without dead ends: 440480 [2020-12-22 07:42:21,557 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 07:42:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440480 states. [2020-12-22 07:42:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440480 to 220294. [2020-12-22 07:42:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220294 states. [2020-12-22 07:42:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220294 states to 220294 states and 338616 transitions. [2020-12-22 07:42:33,156 INFO L78 Accepts]: Start accepts. Automaton has 220294 states and 338616 transitions. Word has length 82 [2020-12-22 07:42:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:33,156 INFO L481 AbstractCegarLoop]: Abstraction has 220294 states and 338616 transitions. [2020-12-22 07:42:33,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 220294 states and 338616 transitions. [2020-12-22 07:42:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:42:33,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:33,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:42:33,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:42:33,158 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:33,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1283476260, now seen corresponding path program 1 times [2020-12-22 07:42:33,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:33,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758964280] [2020-12-22 07:42:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:33,682 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 07:42:33,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758964280] [2020-12-22 07:42:33,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:33,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:42:33,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108203521] [2020-12-22 07:42:33,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:42:33,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:33,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:42:33,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:33,687 INFO L87 Difference]: Start difference. First operand 220294 states and 338616 transitions. Second operand 5 states. [2020-12-22 07:42:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:50,227 INFO L93 Difference]: Finished difference Result 622528 states and 956257 transitions. [2020-12-22 07:42:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:50,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 07:42:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:51,111 INFO L225 Difference]: With dead ends: 622528 [2020-12-22 07:42:51,111 INFO L226 Difference]: Without dead ends: 402322 [2020-12-22 07:42:51,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:51,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402322 states. [2020-12-22 07:43:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402322 to 402320. [2020-12-22 07:43:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402320 states. [2020-12-22 07:43:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402320 states to 402320 states and 612785 transitions. [2020-12-22 07:43:10,715 INFO L78 Accepts]: Start accepts. Automaton has 402320 states and 612785 transitions. Word has length 83 [2020-12-22 07:43:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:10,728 INFO L481 AbstractCegarLoop]: Abstraction has 402320 states and 612785 transitions. [2020-12-22 07:43:10,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:43:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 402320 states and 612785 transitions. [2020-12-22 07:43:10,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:43:10,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:10,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:10,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:43:10,733 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:10,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2141300343, now seen corresponding path program 1 times [2020-12-22 07:43:10,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:10,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854014392] [2020-12-22 07:43:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:10,868 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 07:43:10,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854014392] [2020-12-22 07:43:10,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:10,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:10,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982379516] [2020-12-22 07:43:10,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:10,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:10,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:10,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:10,871 INFO L87 Difference]: Start difference. First operand 402320 states and 612785 transitions. Second operand 4 states. [2020-12-22 07:43:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:24,864 INFO L93 Difference]: Finished difference Result 715506 states and 1087835 transitions. [2020-12-22 07:43:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:24,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:43:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:25,513 INFO L225 Difference]: With dead ends: 715506 [2020-12-22 07:43:25,513 INFO L226 Difference]: Without dead ends: 313260 [2020-12-22 07:43:25,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:43:26,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313260 states. [2020-12-22 07:43:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313260 to 313260. [2020-12-22 07:43:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313260 states. [2020-12-22 07:43:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313260 states to 313260 states and 475153 transitions. [2020-12-22 07:43:40,664 INFO L78 Accepts]: Start accepts. Automaton has 313260 states and 475153 transitions. Word has length 83 [2020-12-22 07:43:40,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:40,664 INFO L481 AbstractCegarLoop]: Abstraction has 313260 states and 475153 transitions. [2020-12-22 07:43:40,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 313260 states and 475153 transitions. [2020-12-22 07:43:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:43:40,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:40,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:40,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:43:40,667 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:40,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:40,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1610663161, now seen corresponding path program 1 times [2020-12-22 07:43:40,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:40,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022252648] [2020-12-22 07:43:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:40,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022252648] [2020-12-22 07:43:40,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:40,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:40,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625136883] [2020-12-22 07:43:40,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:40,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:40,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:40,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:40,777 INFO L87 Difference]: Start difference. First operand 313260 states and 475153 transitions. Second operand 4 states. [2020-12-22 07:44:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:04,524 INFO L93 Difference]: Finished difference Result 823108 states and 1247342 transitions. [2020-12-22 07:44:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:04,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 07:44:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:05,867 INFO L225 Difference]: With dead ends: 823108 [2020-12-22 07:44:05,867 INFO L226 Difference]: Without dead ends: 509980 [2020-12-22 07:44:06,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:44:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509980 states. [2020-12-22 07:44:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509980 to 509978. [2020-12-22 07:44:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509978 states. [2020-12-22 07:44:31,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509978 states to 509978 states and 765119 transitions. [2020-12-22 07:44:31,684 INFO L78 Accepts]: Start accepts. Automaton has 509978 states and 765119 transitions. Word has length 84 [2020-12-22 07:44:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:31,685 INFO L481 AbstractCegarLoop]: Abstraction has 509978 states and 765119 transitions. [2020-12-22 07:44:31,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 509978 states and 765119 transitions. [2020-12-22 07:44:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 07:44:31,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:31,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:31,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:44:31,713 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:31,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1246615136, now seen corresponding path program 1 times [2020-12-22 07:44:31,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:31,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511915292] [2020-12-22 07:44:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:31,863 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 07:44:31,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511915292] [2020-12-22 07:44:31,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:31,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:31,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645793014] [2020-12-22 07:44:31,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:31,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:31,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:31,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:31,866 INFO L87 Difference]: Start difference. First operand 509978 states and 765119 transitions. Second operand 4 states.