/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:07:07,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:07:07,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:07:07,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:07:07,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:07:07,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:07:07,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:07:07,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:07:07,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:07:07,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:07:07,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:07:07,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:07:07,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:07:07,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:07:07,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:07:07,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:07:07,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:07:08,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:07:08,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:07:08,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:07:08,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:07:08,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:07:08,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:07:08,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:07:08,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:07:08,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:07:08,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:07:08,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:07:08,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:07:08,138 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:07:08,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:07:08,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:07:08,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:07:08,140 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:07:08,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:07:08,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:07:08,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:07:08,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:07:08,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:07:08,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:07:08,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:07:08,142 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:07:08,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:07:08,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:07:08,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:07:08,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:07:08,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:07:08,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:07:08,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:07:08,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:07:08,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:07:08,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:07:08,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:07:08,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:07:08,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:07:08,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:07:08,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:07:08,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:07:08,629 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:07:08,630 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:07:08,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label06.c [2020-12-22 10:07:08,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c511993d/431d79cc89d54755a1624ed08e7ccbc7/FLAGbb4ad0d35 [2020-12-22 10:07:09,750 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:07:09,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label06.c [2020-12-22 10:07:09,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c511993d/431d79cc89d54755a1624ed08e7ccbc7/FLAGbb4ad0d35 [2020-12-22 10:07:10,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c511993d/431d79cc89d54755a1624ed08e7ccbc7 [2020-12-22 10:07:10,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:07:10,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:07:10,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:07:10,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:07:10,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:07:10,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:07:10" (1/1) ... [2020-12-22 10:07:10,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f3fb168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:10, skipping insertion in model container [2020-12-22 10:07:10,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:07:10" (1/1) ... [2020-12-22 10:07:10,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:07:10,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:07:10,843 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label06.c[15614,15627] [2020-12-22 10:07:10,893 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label06.c[18188,18201] [2020-12-22 10:07:11,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:07:11,988 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:07:12,035 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label06.c[15614,15627] [2020-12-22 10:07:12,043 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label06.c[18188,18201] [2020-12-22 10:07:12,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:07:12,796 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:07:12,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:12 WrapperNode [2020-12-22 10:07:12,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:07:12,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:07:12,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:07:12,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:07:12,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:12" (1/1) ... [2020-12-22 10:07:12,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:12" (1/1) ... [2020-12-22 10:07:13,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:07:13,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:07:13,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:07:13,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:07:13,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:12" (1/1) ... [2020-12-22 10:07:13,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:12" (1/1) ... [2020-12-22 10:07:13,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:12" (1/1) ... [2020-12-22 10:07:13,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:12" (1/1) ... [2020-12-22 10:07:13,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:12" (1/1) ... [2020-12-22 10:07:13,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:12" (1/1) ... [2020-12-22 10:07:13,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:12" (1/1) ... [2020-12-22 10:07:14,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:07:14,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:07:14,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:07:14,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:07:14,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:07:14,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:07:14,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:07:14,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:07:14,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:07:19,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:07:19,657 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:07:19,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:07:19 BoogieIcfgContainer [2020-12-22 10:07:19,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:07:19,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:07:19,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:07:19,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:07:19,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:07:10" (1/3) ... [2020-12-22 10:07:19,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f688d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:07:19, skipping insertion in model container [2020-12-22 10:07:19,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:07:12" (2/3) ... [2020-12-22 10:07:19,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f688d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:07:19, skipping insertion in model container [2020-12-22 10:07:19,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:07:19" (3/3) ... [2020-12-22 10:07:19,670 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label06.c [2020-12-22 10:07:19,677 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:07:19,683 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:07:19,703 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:07:19,739 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:07:19,739 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:07:19,739 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:07:19,740 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:07:19,740 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:07:19,740 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:07:19,740 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:07:19,740 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:07:19,775 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states. [2020-12-22 10:07:19,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:07:19,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:19,784 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] [2020-12-22 10:07:19,785 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:19,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:19,792 INFO L82 PathProgramCache]: Analyzing trace with hash -158902347, now seen corresponding path program 1 times [2020-12-22 10:07:19,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:19,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521458821] [2020-12-22 10:07:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:20,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521458821] [2020-12-22 10:07:20,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:20,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:07:20,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608879279] [2020-12-22 10:07:20,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:20,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:20,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:20,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:20,209 INFO L87 Difference]: Start difference. First operand 927 states. Second operand 3 states. [2020-12-22 10:07:25,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:25,248 INFO L93 Difference]: Finished difference Result 2561 states and 4922 transitions. [2020-12-22 10:07:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:25,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 10:07:25,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:25,280 INFO L225 Difference]: With dead ends: 2561 [2020-12-22 10:07:25,280 INFO L226 Difference]: Without dead ends: 1612 [2020-12-22 10:07:25,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2020-12-22 10:07:25,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1612. [2020-12-22 10:07:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1612 states. [2020-12-22 10:07:25,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2649 transitions. [2020-12-22 10:07:25,446 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2649 transitions. Word has length 24 [2020-12-22 10:07:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:25,447 INFO L481 AbstractCegarLoop]: Abstraction has 1612 states and 2649 transitions. [2020-12-22 10:07:25,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2649 transitions. [2020-12-22 10:07:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:07:25,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:25,450 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] [2020-12-22 10:07:25,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:07:25,450 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:25,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:25,451 INFO L82 PathProgramCache]: Analyzing trace with hash -46774319, now seen corresponding path program 1 times [2020-12-22 10:07:25,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:25,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765517730] [2020-12-22 10:07:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:25,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765517730] [2020-12-22 10:07:25,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:25,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:07:25,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790829097] [2020-12-22 10:07:25,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:07:25,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:25,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:07:25,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:07:25,637 INFO L87 Difference]: Start difference. First operand 1612 states and 2649 transitions. Second operand 5 states. [2020-12-22 10:07:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:25,736 INFO L93 Difference]: Finished difference Result 1677 states and 2750 transitions. [2020-12-22 10:07:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:07:25,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:07:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:25,747 INFO L225 Difference]: With dead ends: 1677 [2020-12-22 10:07:25,747 INFO L226 Difference]: Without dead ends: 1612 [2020-12-22 10:07:25,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:07:25,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2020-12-22 10:07:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1612. [2020-12-22 10:07:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1612 states. [2020-12-22 10:07:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2609 transitions. [2020-12-22 10:07:25,790 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2609 transitions. Word has length 38 [2020-12-22 10:07:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:25,790 INFO L481 AbstractCegarLoop]: Abstraction has 1612 states and 2609 transitions. [2020-12-22 10:07:25,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:07:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2609 transitions. [2020-12-22 10:07:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:25,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:25,794 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 10:07:25,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:07:25,795 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:25,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:25,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1531755293, now seen corresponding path program 1 times [2020-12-22 10:07:25,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:25,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443005350] [2020-12-22 10:07:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:25,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443005350] [2020-12-22 10:07:25,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:25,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:25,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374667935] [2020-12-22 10:07:25,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:25,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:25,917 INFO L87 Difference]: Start difference. First operand 1612 states and 2609 transitions. Second operand 3 states. [2020-12-22 10:07:25,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:25,956 INFO L93 Difference]: Finished difference Result 1728 states and 2793 transitions. [2020-12-22 10:07:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:25,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:25,966 INFO L225 Difference]: With dead ends: 1728 [2020-12-22 10:07:25,967 INFO L226 Difference]: Without dead ends: 1667 [2020-12-22 10:07:25,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2020-12-22 10:07:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1665. [2020-12-22 10:07:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1665 states. [2020-12-22 10:07:26,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2694 transitions. [2020-12-22 10:07:26,086 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2694 transitions. Word has length 77 [2020-12-22 10:07:26,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:26,088 INFO L481 AbstractCegarLoop]: Abstraction has 1665 states and 2694 transitions. [2020-12-22 10:07:26,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:26,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2694 transitions. [2020-12-22 10:07:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:26,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:26,097 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 10:07:26,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:07:26,097 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash 786172563, now seen corresponding path program 1 times [2020-12-22 10:07:26,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:26,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839724595] [2020-12-22 10:07:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:26,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839724595] [2020-12-22 10:07:26,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:26,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:26,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114375717] [2020-12-22 10:07:26,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:26,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:26,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:26,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:26,298 INFO L87 Difference]: Start difference. First operand 1665 states and 2694 transitions. Second operand 3 states. [2020-12-22 10:07:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:26,360 INFO L93 Difference]: Finished difference Result 1881 states and 3038 transitions. [2020-12-22 10:07:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:26,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:26,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:26,372 INFO L225 Difference]: With dead ends: 1881 [2020-12-22 10:07:26,372 INFO L226 Difference]: Without dead ends: 1767 [2020-12-22 10:07:26,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:26,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2020-12-22 10:07:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1765. [2020-12-22 10:07:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1765 states. [2020-12-22 10:07:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 2853 transitions. [2020-12-22 10:07:26,429 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 2853 transitions. Word has length 77 [2020-12-22 10:07:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:26,429 INFO L481 AbstractCegarLoop]: Abstraction has 1765 states and 2853 transitions. [2020-12-22 10:07:26,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 2853 transitions. [2020-12-22 10:07:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:26,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:26,431 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 10:07:26,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:07:26,432 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:26,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1153858295, now seen corresponding path program 1 times [2020-12-22 10:07:26,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:26,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945686398] [2020-12-22 10:07:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:26,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945686398] [2020-12-22 10:07:26,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:26,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:26,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37380306] [2020-12-22 10:07:26,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:26,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:26,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:26,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:26,545 INFO L87 Difference]: Start difference. First operand 1765 states and 2853 transitions. Second operand 3 states. [2020-12-22 10:07:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:26,610 INFO L93 Difference]: Finished difference Result 2169 states and 3495 transitions. [2020-12-22 10:07:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:26,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:26,627 INFO L225 Difference]: With dead ends: 2169 [2020-12-22 10:07:26,628 INFO L226 Difference]: Without dead ends: 1955 [2020-12-22 10:07:26,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:26,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2020-12-22 10:07:26,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1953. [2020-12-22 10:07:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1953 states. [2020-12-22 10:07:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 3149 transitions. [2020-12-22 10:07:26,703 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 3149 transitions. Word has length 77 [2020-12-22 10:07:26,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:26,706 INFO L481 AbstractCegarLoop]: Abstraction has 1953 states and 3149 transitions. [2020-12-22 10:07:26,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:26,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 3149 transitions. [2020-12-22 10:07:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:26,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:26,709 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 10:07:26,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:07:26,709 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:26,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1546824319, now seen corresponding path program 1 times [2020-12-22 10:07:26,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:26,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085720253] [2020-12-22 10:07:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:26,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085720253] [2020-12-22 10:07:26,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:26,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:26,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574358042] [2020-12-22 10:07:26,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:26,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:26,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:26,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:26,879 INFO L87 Difference]: Start difference. First operand 1953 states and 3149 transitions. Second operand 3 states. [2020-12-22 10:07:26,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:26,948 INFO L93 Difference]: Finished difference Result 2709 states and 4343 transitions. [2020-12-22 10:07:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:26,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:26,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:26,965 INFO L225 Difference]: With dead ends: 2709 [2020-12-22 10:07:26,966 INFO L226 Difference]: Without dead ends: 2307 [2020-12-22 10:07:26,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2020-12-22 10:07:27,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2305. [2020-12-22 10:07:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2305 states. [2020-12-22 10:07:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3697 transitions. [2020-12-22 10:07:27,051 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3697 transitions. Word has length 77 [2020-12-22 10:07:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:27,053 INFO L481 AbstractCegarLoop]: Abstraction has 2305 states and 3697 transitions. [2020-12-22 10:07:27,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3697 transitions. [2020-12-22 10:07:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:27,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:27,054 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 10:07:27,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:07:27,055 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:27,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:27,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1884617461, now seen corresponding path program 1 times [2020-12-22 10:07:27,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:27,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646267542] [2020-12-22 10:07:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:27,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646267542] [2020-12-22 10:07:27,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:27,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:27,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569466795] [2020-12-22 10:07:27,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:27,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:27,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:27,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:27,206 INFO L87 Difference]: Start difference. First operand 2305 states and 3697 transitions. Second operand 3 states. [2020-12-22 10:07:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:27,303 INFO L93 Difference]: Finished difference Result 3717 states and 5907 transitions. [2020-12-22 10:07:27,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:27,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:27,321 INFO L225 Difference]: With dead ends: 3717 [2020-12-22 10:07:27,321 INFO L226 Difference]: Without dead ends: 2963 [2020-12-22 10:07:27,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-12-22 10:07:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2961. [2020-12-22 10:07:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2961 states. [2020-12-22 10:07:27,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 4705 transitions. [2020-12-22 10:07:27,440 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 4705 transitions. Word has length 77 [2020-12-22 10:07:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:27,440 INFO L481 AbstractCegarLoop]: Abstraction has 2961 states and 4705 transitions. [2020-12-22 10:07:27,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 4705 transitions. [2020-12-22 10:07:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:27,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:27,442 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 10:07:27,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:07:27,442 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:27,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:27,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2001711063, now seen corresponding path program 1 times [2020-12-22 10:07:27,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:27,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933683385] [2020-12-22 10:07:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:27,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933683385] [2020-12-22 10:07:27,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:27,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:27,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971334171] [2020-12-22 10:07:27,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:27,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:27,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:27,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:27,602 INFO L87 Difference]: Start difference. First operand 2961 states and 4705 transitions. Second operand 8 states. [2020-12-22 10:07:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:28,757 INFO L93 Difference]: Finished difference Result 19881 states and 31021 transitions. [2020-12-22 10:07:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:07:28,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:07:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:28,870 INFO L225 Difference]: With dead ends: 19881 [2020-12-22 10:07:28,870 INFO L226 Difference]: Without dead ends: 18471 [2020-12-22 10:07:28,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:07:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18471 states. [2020-12-22 10:07:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18471 to 4369. [2020-12-22 10:07:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4369 states. [2020-12-22 10:07:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 6833 transitions. [2020-12-22 10:07:29,308 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 6833 transitions. Word has length 77 [2020-12-22 10:07:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:29,309 INFO L481 AbstractCegarLoop]: Abstraction has 4369 states and 6833 transitions. [2020-12-22 10:07:29,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 6833 transitions. [2020-12-22 10:07:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:07:29,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:29,310 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 10:07:29,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:07:29,313 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:29,313 INFO L82 PathProgramCache]: Analyzing trace with hash -914675591, now seen corresponding path program 1 times [2020-12-22 10:07:29,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:29,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167331864] [2020-12-22 10:07:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:29,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167331864] [2020-12-22 10:07:29,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:29,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:29,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16143948] [2020-12-22 10:07:29,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:29,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:29,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:29,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:29,398 INFO L87 Difference]: Start difference. First operand 4369 states and 6833 transitions. Second operand 3 states. [2020-12-22 10:07:29,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:29,758 INFO L93 Difference]: Finished difference Result 9653 states and 14867 transitions. [2020-12-22 10:07:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:29,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:07:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:29,777 INFO L225 Difference]: With dead ends: 9653 [2020-12-22 10:07:29,777 INFO L226 Difference]: Without dead ends: 6835 [2020-12-22 10:07:29,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6835 states. [2020-12-22 10:07:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6835 to 6769. [2020-12-22 10:07:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6769 states. [2020-12-22 10:07:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 10321 transitions. [2020-12-22 10:07:30,198 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 10321 transitions. Word has length 79 [2020-12-22 10:07:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:30,199 INFO L481 AbstractCegarLoop]: Abstraction has 6769 states and 10321 transitions. [2020-12-22 10:07:30,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 10321 transitions. [2020-12-22 10:07:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:07:30,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:30,201 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 10:07:30,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:07:30,201 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:30,202 INFO L82 PathProgramCache]: Analyzing trace with hash -848182079, now seen corresponding path program 1 times [2020-12-22 10:07:30,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:30,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268181885] [2020-12-22 10:07:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:30,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268181885] [2020-12-22 10:07:30,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:30,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:30,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116031147] [2020-12-22 10:07:30,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:30,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:30,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:30,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:30,573 INFO L87 Difference]: Start difference. First operand 6769 states and 10321 transitions. Second operand 8 states. [2020-12-22 10:07:31,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:31,223 INFO L93 Difference]: Finished difference Result 11989 states and 18131 transitions. [2020-12-22 10:07:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:07:31,224 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:07:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:31,239 INFO L225 Difference]: With dead ends: 11989 [2020-12-22 10:07:31,239 INFO L226 Difference]: Without dead ends: 6771 [2020-12-22 10:07:31,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:07:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6771 states. [2020-12-22 10:07:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6771 to 6769. [2020-12-22 10:07:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6769 states. [2020-12-22 10:07:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 10257 transitions. [2020-12-22 10:07:31,655 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 10257 transitions. Word has length 79 [2020-12-22 10:07:31,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:31,656 INFO L481 AbstractCegarLoop]: Abstraction has 6769 states and 10257 transitions. [2020-12-22 10:07:31,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 10257 transitions. [2020-12-22 10:07:31,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:07:31,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:31,657 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 10:07:31,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:07:31,658 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:31,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:31,658 INFO L82 PathProgramCache]: Analyzing trace with hash -938563623, now seen corresponding path program 1 times [2020-12-22 10:07:31,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:31,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665722737] [2020-12-22 10:07:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:31,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665722737] [2020-12-22 10:07:31,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:31,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:07:31,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670030563] [2020-12-22 10:07:31,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:07:31,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:31,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:07:31,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:07:31,772 INFO L87 Difference]: Start difference. First operand 6769 states and 10257 transitions. Second operand 6 states. [2020-12-22 10:07:32,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:32,246 INFO L93 Difference]: Finished difference Result 11987 states and 18002 transitions. [2020-12-22 10:07:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:07:32,247 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 10:07:32,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:32,263 INFO L225 Difference]: With dead ends: 11987 [2020-12-22 10:07:32,264 INFO L226 Difference]: Without dead ends: 6769 [2020-12-22 10:07:32,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:07:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2020-12-22 10:07:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 6769. [2020-12-22 10:07:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6769 states. [2020-12-22 10:07:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 10193 transitions. [2020-12-22 10:07:32,754 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 10193 transitions. Word has length 80 [2020-12-22 10:07:32,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:32,755 INFO L481 AbstractCegarLoop]: Abstraction has 6769 states and 10193 transitions. [2020-12-22 10:07:32,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:07:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 10193 transitions. [2020-12-22 10:07:32,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:07:32,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:32,756 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 10:07:32,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:07:32,757 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:32,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1639628201, now seen corresponding path program 1 times [2020-12-22 10:07:32,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:32,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405117725] [2020-12-22 10:07:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:32,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405117725] [2020-12-22 10:07:32,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:32,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:32,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347151722] [2020-12-22 10:07:32,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:32,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:32,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:32,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:32,892 INFO L87 Difference]: Start difference. First operand 6769 states and 10193 transitions. Second operand 8 states. [2020-12-22 10:07:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:33,785 INFO L93 Difference]: Finished difference Result 10675 states and 15836 transitions. [2020-12-22 10:07:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:07:33,786 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:07:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:33,812 INFO L225 Difference]: With dead ends: 10675 [2020-12-22 10:07:33,812 INFO L226 Difference]: Without dead ends: 10673 [2020-12-22 10:07:33,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:07:33,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2020-12-22 10:07:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 6961. [2020-12-22 10:07:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6961 states. [2020-12-22 10:07:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 10353 transitions. [2020-12-22 10:07:34,491 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 10353 transitions. Word has length 80 [2020-12-22 10:07:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:34,491 INFO L481 AbstractCegarLoop]: Abstraction has 6961 states and 10353 transitions. [2020-12-22 10:07:34,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 10353 transitions. [2020-12-22 10:07:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 10:07:34,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:34,493 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 10:07:34,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:07:34,494 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash 492740282, now seen corresponding path program 1 times [2020-12-22 10:07:34,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:34,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742607257] [2020-12-22 10:07:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:34,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742607257] [2020-12-22 10:07:34,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:34,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:34,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143762245] [2020-12-22 10:07:34,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:34,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:34,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:34,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:34,563 INFO L87 Difference]: Start difference. First operand 6961 states and 10353 transitions. Second operand 3 states. [2020-12-22 10:07:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:35,397 INFO L93 Difference]: Finished difference Result 12472 states and 18423 transitions. [2020-12-22 10:07:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:35,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 10:07:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:35,421 INFO L225 Difference]: With dead ends: 12472 [2020-12-22 10:07:35,421 INFO L226 Difference]: Without dead ends: 9461 [2020-12-22 10:07:35,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:35,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9461 states. [2020-12-22 10:07:36,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9461 to 9459. [2020-12-22 10:07:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9459 states. [2020-12-22 10:07:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 13907 transitions. [2020-12-22 10:07:36,264 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 13907 transitions. Word has length 81 [2020-12-22 10:07:36,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:36,264 INFO L481 AbstractCegarLoop]: Abstraction has 9459 states and 13907 transitions. [2020-12-22 10:07:36,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 13907 transitions. [2020-12-22 10:07:36,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:07:36,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:36,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:36,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:07:36,268 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:36,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1095515843, now seen corresponding path program 1 times [2020-12-22 10:07:36,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:36,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504295575] [2020-12-22 10:07:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:36,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504295575] [2020-12-22 10:07:36,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616480324] [2020-12-22 10:07:36,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:07:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:36,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 10:07:36,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:07:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:36,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 10:07:36,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 10:07:36,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048971919] [2020-12-22 10:07:36,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:36,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:36,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:36,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:07:36,700 INFO L87 Difference]: Start difference. First operand 9459 states and 13907 transitions. Second operand 3 states. [2020-12-22 10:07:42,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:42,541 INFO L93 Difference]: Finished difference Result 12465 states and 18834 transitions. [2020-12-22 10:07:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:42,542 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:07:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:42,564 INFO L225 Difference]: With dead ends: 12465 [2020-12-22 10:07:42,564 INFO L226 Difference]: Without dead ends: 10961 [2020-12-22 10:07:42,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:07:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10961 states. [2020-12-22 10:07:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10961 to 10961. [2020-12-22 10:07:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10961 states. [2020-12-22 10:07:43,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10961 states to 10961 states and 16063 transitions. [2020-12-22 10:07:43,258 INFO L78 Accepts]: Start accepts. Automaton has 10961 states and 16063 transitions. Word has length 95 [2020-12-22 10:07:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:43,258 INFO L481 AbstractCegarLoop]: Abstraction has 10961 states and 16063 transitions. [2020-12-22 10:07:43,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 10961 states and 16063 transitions. [2020-12-22 10:07:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 10:07:43,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:43,261 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:43,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 10:07:43,476 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:43,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1350467183, now seen corresponding path program 1 times [2020-12-22 10:07:43,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:43,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920368251] [2020-12-22 10:07:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:43,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920368251] [2020-12-22 10:07:43,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:43,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:07:43,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076665553] [2020-12-22 10:07:43,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:43,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:43,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:43,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:43,563 INFO L87 Difference]: Start difference. First operand 10961 states and 16063 transitions. Second operand 3 states. [2020-12-22 10:07:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:49,235 INFO L93 Difference]: Finished difference Result 15469 states and 23146 transitions. [2020-12-22 10:07:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:49,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2020-12-22 10:07:49,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:49,263 INFO L225 Difference]: With dead ends: 15469 [2020-12-22 10:07:49,263 INFO L226 Difference]: Without dead ends: 12463 [2020-12-22 10:07:49,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:49,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12463 states. [2020-12-22 10:07:49,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12463 to 12463. [2020-12-22 10:07:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12463 states. [2020-12-22 10:07:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12463 states to 12463 states and 18442 transitions. [2020-12-22 10:07:49,787 INFO L78 Accepts]: Start accepts. Automaton has 12463 states and 18442 transitions. Word has length 98 [2020-12-22 10:07:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:49,787 INFO L481 AbstractCegarLoop]: Abstraction has 12463 states and 18442 transitions. [2020-12-22 10:07:49,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 12463 states and 18442 transitions. [2020-12-22 10:07:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 10:07:49,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:49,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:49,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:07:49,790 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:49,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:49,791 INFO L82 PathProgramCache]: Analyzing trace with hash -636499571, now seen corresponding path program 1 times [2020-12-22 10:07:49,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:49,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004986606] [2020-12-22 10:07:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:49,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004986606] [2020-12-22 10:07:49,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:49,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:07:49,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59757956] [2020-12-22 10:07:49,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:49,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:49,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:49,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:49,869 INFO L87 Difference]: Start difference. First operand 12463 states and 18442 transitions. Second operand 3 states. [2020-12-22 10:07:55,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:55,761 INFO L93 Difference]: Finished difference Result 21479 states and 32440 transitions. [2020-12-22 10:07:55,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:55,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-12-22 10:07:55,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:55,805 INFO L225 Difference]: With dead ends: 21479 [2020-12-22 10:07:55,805 INFO L226 Difference]: Without dead ends: 16971 [2020-12-22 10:07:55,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:55,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16971 states. [2020-12-22 10:07:56,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16971 to 16969. [2020-12-22 10:07:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16969 states. [2020-12-22 10:07:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16969 states to 16969 states and 24258 transitions. [2020-12-22 10:07:56,608 INFO L78 Accepts]: Start accepts. Automaton has 16969 states and 24258 transitions. Word has length 99 [2020-12-22 10:07:56,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:56,609 INFO L481 AbstractCegarLoop]: Abstraction has 16969 states and 24258 transitions. [2020-12-22 10:07:56,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 16969 states and 24258 transitions. [2020-12-22 10:07:56,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 10:07:56,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:56,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:56,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:07:56,616 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:56,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:56,617 INFO L82 PathProgramCache]: Analyzing trace with hash 180322351, now seen corresponding path program 1 times [2020-12-22 10:07:56,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:56,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959080911] [2020-12-22 10:07:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:56,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959080911] [2020-12-22 10:07:56,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:56,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:56,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260893502] [2020-12-22 10:07:56,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:07:56,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:56,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:07:56,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:07:56,750 INFO L87 Difference]: Start difference. First operand 16969 states and 24258 transitions. Second operand 4 states. [2020-12-22 10:08:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:06,215 INFO L93 Difference]: Finished difference Result 26734 states and 37974 transitions. [2020-12-22 10:08:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:08:06,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-12-22 10:08:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:06,251 INFO L225 Difference]: With dead ends: 26734 [2020-12-22 10:08:06,251 INFO L226 Difference]: Without dead ends: 17720 [2020-12-22 10:08:06,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:08:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17720 states. [2020-12-22 10:08:07,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17720 to 17720. [2020-12-22 10:08:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17720 states. [2020-12-22 10:08:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17720 states to 17720 states and 24655 transitions. [2020-12-22 10:08:07,097 INFO L78 Accepts]: Start accepts. Automaton has 17720 states and 24655 transitions. Word has length 110 [2020-12-22 10:08:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:07,098 INFO L481 AbstractCegarLoop]: Abstraction has 17720 states and 24655 transitions. [2020-12-22 10:08:07,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:08:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 17720 states and 24655 transitions. [2020-12-22 10:08:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:07,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:07,105 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:07,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:08:07,105 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:07,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:07,106 INFO L82 PathProgramCache]: Analyzing trace with hash 651816077, now seen corresponding path program 1 times [2020-12-22 10:08:07,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:07,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577390353] [2020-12-22 10:08:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:08:07,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577390353] [2020-12-22 10:08:07,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:07,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:07,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132891024] [2020-12-22 10:08:07,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:07,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:07,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:07,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:07,262 INFO L87 Difference]: Start difference. First operand 17720 states and 24655 transitions. Second operand 8 states. [2020-12-22 10:08:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:10,156 INFO L93 Difference]: Finished difference Result 66726 states and 95190 transitions. [2020-12-22 10:08:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:10,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:10,231 INFO L225 Difference]: With dead ends: 66726 [2020-12-22 10:08:10,232 INFO L226 Difference]: Without dead ends: 58820 [2020-12-22 10:08:10,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:10,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58820 states. [2020-12-22 10:08:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58820 to 25624. [2020-12-22 10:08:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25624 states. [2020-12-22 10:08:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 35951 transitions. [2020-12-22 10:08:11,806 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 35951 transitions. Word has length 111 [2020-12-22 10:08:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:11,807 INFO L481 AbstractCegarLoop]: Abstraction has 25624 states and 35951 transitions. [2020-12-22 10:08:11,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 35951 transitions. [2020-12-22 10:08:11,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:11,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:11,813 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:11,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:08:11,813 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:11,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:11,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1116966739, now seen corresponding path program 1 times [2020-12-22 10:08:11,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:11,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503101893] [2020-12-22 10:08:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:08:11,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503101893] [2020-12-22 10:08:11,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:11,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:11,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12848672] [2020-12-22 10:08:11,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:11,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:11,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:11,965 INFO L87 Difference]: Start difference. First operand 25624 states and 35951 transitions. Second operand 8 states. [2020-12-22 10:08:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:16,624 INFO L93 Difference]: Finished difference Result 74630 states and 106486 transitions. [2020-12-22 10:08:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:16,625 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:16,697 INFO L225 Difference]: With dead ends: 74630 [2020-12-22 10:08:16,697 INFO L226 Difference]: Without dead ends: 66724 [2020-12-22 10:08:16,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66724 states. [2020-12-22 10:08:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66724 to 37496. [2020-12-22 10:08:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37496 states. [2020-12-22 10:08:19,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37496 states to 37496 states and 52815 transitions. [2020-12-22 10:08:19,216 INFO L78 Accepts]: Start accepts. Automaton has 37496 states and 52815 transitions. Word has length 111 [2020-12-22 10:08:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:19,216 INFO L481 AbstractCegarLoop]: Abstraction has 37496 states and 52815 transitions. [2020-12-22 10:08:19,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:19,216 INFO L276 IsEmpty]: Start isEmpty. Operand 37496 states and 52815 transitions. [2020-12-22 10:08:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:19,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:19,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:19,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:08:19,224 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:19,225 INFO L82 PathProgramCache]: Analyzing trace with hash 14673101, now seen corresponding path program 1 times [2020-12-22 10:08:19,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:19,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021403011] [2020-12-22 10:08:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:08:19,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021403011] [2020-12-22 10:08:19,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:19,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:19,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902606716] [2020-12-22 10:08:19,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:19,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:19,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:19,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:19,394 INFO L87 Difference]: Start difference. First operand 37496 states and 52815 transitions. Second operand 8 states. [2020-12-22 10:08:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:24,315 INFO L93 Difference]: Finished difference Result 82534 states and 117782 transitions. [2020-12-22 10:08:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:24,316 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:24,398 INFO L225 Difference]: With dead ends: 82534 [2020-12-22 10:08:24,398 INFO L226 Difference]: Without dead ends: 74628 [2020-12-22 10:08:24,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74628 states. [2020-12-22 10:08:27,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74628 to 45400. [2020-12-22 10:08:27,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45400 states. [2020-12-22 10:08:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45400 states to 45400 states and 64111 transitions. [2020-12-22 10:08:27,882 INFO L78 Accepts]: Start accepts. Automaton has 45400 states and 64111 transitions. Word has length 111 [2020-12-22 10:08:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:27,883 INFO L481 AbstractCegarLoop]: Abstraction has 45400 states and 64111 transitions. [2020-12-22 10:08:27,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 45400 states and 64111 transitions. [2020-12-22 10:08:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:27,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:27,890 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:27,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:08:27,891 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:27,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1220785939, now seen corresponding path program 1 times [2020-12-22 10:08:27,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:27,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091543400] [2020-12-22 10:08:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:08:28,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091543400] [2020-12-22 10:08:28,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:28,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:28,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130645942] [2020-12-22 10:08:28,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:28,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:28,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:28,056 INFO L87 Difference]: Start difference. First operand 45400 states and 64111 transitions. Second operand 8 states. [2020-12-22 10:08:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:33,802 INFO L93 Difference]: Finished difference Result 90438 states and 129078 transitions. [2020-12-22 10:08:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:33,803 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:33,903 INFO L225 Difference]: With dead ends: 90438 [2020-12-22 10:08:33,903 INFO L226 Difference]: Without dead ends: 82532 [2020-12-22 10:08:33,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:33,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82532 states. [2020-12-22 10:08:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82532 to 53304. [2020-12-22 10:08:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53304 states. [2020-12-22 10:08:38,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53304 states to 53304 states and 75407 transitions. [2020-12-22 10:08:38,107 INFO L78 Accepts]: Start accepts. Automaton has 53304 states and 75407 transitions. Word has length 111 [2020-12-22 10:08:38,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:38,107 INFO L481 AbstractCegarLoop]: Abstraction has 53304 states and 75407 transitions. [2020-12-22 10:08:38,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:38,108 INFO L276 IsEmpty]: Start isEmpty. Operand 53304 states and 75407 transitions. [2020-12-22 10:08:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:38,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:38,114 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:38,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:08:38,115 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:38,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1653185805, now seen corresponding path program 1 times [2020-12-22 10:08:38,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:38,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512439800] [2020-12-22 10:08:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:08:38,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512439800] [2020-12-22 10:08:38,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:38,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:38,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244282811] [2020-12-22 10:08:38,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:38,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:38,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:38,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:38,460 INFO L87 Difference]: Start difference. First operand 53304 states and 75407 transitions. Second operand 8 states. [2020-12-22 10:08:44,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:44,860 INFO L93 Difference]: Finished difference Result 98342 states and 140374 transitions. [2020-12-22 10:08:44,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:44,863 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:44,960 INFO L225 Difference]: With dead ends: 98342 [2020-12-22 10:08:44,960 INFO L226 Difference]: Without dead ends: 90436 [2020-12-22 10:08:44,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90436 states. [2020-12-22 10:08:49,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90436 to 61208. [2020-12-22 10:08:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61208 states. [2020-12-22 10:08:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61208 states to 61208 states and 86703 transitions. [2020-12-22 10:08:49,907 INFO L78 Accepts]: Start accepts. Automaton has 61208 states and 86703 transitions. Word has length 111 [2020-12-22 10:08:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:49,907 INFO L481 AbstractCegarLoop]: Abstraction has 61208 states and 86703 transitions. [2020-12-22 10:08:49,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 61208 states and 86703 transitions. [2020-12-22 10:08:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:08:49,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:49,916 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:49,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:08:49,916 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:49,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2019174363, now seen corresponding path program 1 times [2020-12-22 10:08:49,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:49,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139452162] [2020-12-22 10:08:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:08:50,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139452162] [2020-12-22 10:08:50,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:50,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:50,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607084378] [2020-12-22 10:08:50,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:50,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:50,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:50,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:50,035 INFO L87 Difference]: Start difference. First operand 61208 states and 86703 transitions. Second operand 3 states. [2020-12-22 10:08:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:53,576 INFO L93 Difference]: Finished difference Result 97021 states and 138328 transitions. [2020-12-22 10:08:53,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:53,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:08:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:53,618 INFO L225 Difference]: With dead ends: 97021 [2020-12-22 10:08:53,618 INFO L226 Difference]: Without dead ends: 45627 [2020-12-22 10:08:53,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45627 states. [2020-12-22 10:08:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45627 to 45625. [2020-12-22 10:08:56,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45625 states. [2020-12-22 10:08:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45625 states to 45625 states and 64469 transitions. [2020-12-22 10:08:56,956 INFO L78 Accepts]: Start accepts. Automaton has 45625 states and 64469 transitions. Word has length 113 [2020-12-22 10:08:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:56,957 INFO L481 AbstractCegarLoop]: Abstraction has 45625 states and 64469 transitions. [2020-12-22 10:08:56,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 45625 states and 64469 transitions. [2020-12-22 10:08:56,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:08:56,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:56,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:56,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:08:56,963 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:56,964 INFO L82 PathProgramCache]: Analyzing trace with hash -21629902, now seen corresponding path program 1 times [2020-12-22 10:08:56,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:56,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113246829] [2020-12-22 10:08:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:08:57,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113246829] [2020-12-22 10:08:57,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:57,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:57,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978568138] [2020-12-22 10:08:57,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:57,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:57,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:57,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:57,115 INFO L87 Difference]: Start difference. First operand 45625 states and 64469 transitions. Second operand 8 states. [2020-12-22 10:09:03,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:03,154 INFO L93 Difference]: Finished difference Result 78663 states and 112092 transitions. [2020-12-22 10:09:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:03,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 113 [2020-12-22 10:09:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:03,228 INFO L225 Difference]: With dead ends: 78663 [2020-12-22 10:09:03,229 INFO L226 Difference]: Without dead ends: 73157 [2020-12-22 10:09:03,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:03,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73157 states. [2020-12-22 10:09:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73157 to 51129. [2020-12-22 10:09:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51129 states. [2020-12-22 10:09:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51129 states to 51129 states and 72341 transitions. [2020-12-22 10:09:07,509 INFO L78 Accepts]: Start accepts. Automaton has 51129 states and 72341 transitions. Word has length 113 [2020-12-22 10:09:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:07,509 INFO L481 AbstractCegarLoop]: Abstraction has 51129 states and 72341 transitions. [2020-12-22 10:09:07,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 51129 states and 72341 transitions. [2020-12-22 10:09:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:09:07,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:07,515 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:07,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 10:09:07,516 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:07,516 INFO L82 PathProgramCache]: Analyzing trace with hash 254785081, now seen corresponding path program 1 times [2020-12-22 10:09:07,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:07,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482914250] [2020-12-22 10:09:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:07,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482914250] [2020-12-22 10:09:07,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056405653] [2020-12-22 10:09:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:09:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:08,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:09:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:09:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:09:08,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:09:08,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 10:09:08,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997352292] [2020-12-22 10:09:08,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:09:08,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:08,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:09:08,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:09:08,338 INFO L87 Difference]: Start difference. First operand 51129 states and 72341 transitions. Second operand 16 states. [2020-12-22 10:09:09,827 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 10:09:13,967 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:09:14,179 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 10:09:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:40,722 INFO L93 Difference]: Finished difference Result 317070 states and 446576 transitions. [2020-12-22 10:09:40,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 10:09:40,723 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 114 [2020-12-22 10:09:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:41,355 INFO L225 Difference]: With dead ends: 317070 [2020-12-22 10:09:41,355 INFO L226 Difference]: Without dead ends: 275788 [2020-12-22 10:09:41,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 10:09:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275788 states. [2020-12-22 10:09:57,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275788 to 142822. [2020-12-22 10:09:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142822 states. [2020-12-22 10:09:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142822 states to 142822 states and 198579 transitions. [2020-12-22 10:09:58,360 INFO L78 Accepts]: Start accepts. Automaton has 142822 states and 198579 transitions. Word has length 114 [2020-12-22 10:09:58,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:58,360 INFO L481 AbstractCegarLoop]: Abstraction has 142822 states and 198579 transitions. [2020-12-22 10:09:58,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:09:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 142822 states and 198579 transitions. [2020-12-22 10:09:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 10:09:58,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:58,379 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:58,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:09:58,593 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:58,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:58,594 INFO L82 PathProgramCache]: Analyzing trace with hash -725866966, now seen corresponding path program 1 times [2020-12-22 10:09:58,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:58,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084810525] [2020-12-22 10:09:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:59,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084810525] [2020-12-22 10:09:59,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013663335] [2020-12-22 10:09:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:09:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:59,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:09:59,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:09:59,438 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:10:00,031 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-22 10:10:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:00,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:10:00,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:10:00,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479126458] [2020-12-22 10:10:00,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:10:00,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:00,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:10:00,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:10:00,134 INFO L87 Difference]: Start difference. First operand 142822 states and 198579 transitions. Second operand 22 states. [2020-12-22 10:10:02,366 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:02,537 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-22 10:10:02,750 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-12-22 10:10:03,033 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 10:10:03,838 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-12-22 10:10:04,122 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-12-22 10:10:08,984 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:11,142 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:10:11,510 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:10:12,398 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:10:14,876 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:10:15,754 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:10:16,037 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:10:19,196 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:10:20,560 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:10:29,201 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-12-22 10:10:29,532 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-22 10:10:29,865 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-22 10:10:30,027 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:10:30,262 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-12-22 10:10:30,548 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 10:10:30,688 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:10:30,905 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-22 10:10:31,485 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-22 10:10:31,851 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-12-22 10:10:32,215 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-12-22 10:10:32,423 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 10:10:32,704 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-12-22 10:10:32,848 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:33,087 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-22 10:10:33,260 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:10:33,514 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-12-22 10:10:34,693 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-12-22 10:10:34,855 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:10:35,181 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-12-22 10:10:35,344 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 10:10:35,912 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-12-22 10:10:36,798 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 10:10:36,951 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:10:37,158 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:10:37,491 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-12-22 10:10:37,790 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:10:54,773 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:10:54,955 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40