/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:19:19,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:19:19,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:19:20,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:19:20,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:19:20,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:19:20,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:19:20,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:19:20,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:19:20,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:19:20,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:19:20,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:19:20,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:19:20,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:19:20,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:19:20,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:19:20,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:19:20,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:19:20,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:19:20,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:19:20,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:19:20,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:19:20,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:19:20,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:19:20,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:19:20,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:19:20,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:19:20,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:19:20,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:19:20,144 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:19:20,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:19:20,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:19:20,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:19:20,146 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:19:20,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:19:20,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:19:20,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:19:20,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:19:20,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:19:20,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:19:20,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:19:20,149 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:19:20,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:19:20,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:19:20,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:19:20,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:19:20,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:19:20,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:19:20,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:19:20,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:19:20,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:19:20,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:19:20,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:19:20,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:19:20,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:19:20,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:19:20,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:19:20,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:19:20,547 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:19:20,548 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:19:20,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-12-22 08:19:20,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ca1812a/ee4b01a334694ef7a47cc0ac8858811a/FLAGbc036293c [2020-12-22 08:19:21,409 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:19:21,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-12-22 08:19:21,440 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ca1812a/ee4b01a334694ef7a47cc0ac8858811a/FLAGbc036293c [2020-12-22 08:19:21,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ca1812a/ee4b01a334694ef7a47cc0ac8858811a [2020-12-22 08:19:21,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:19:21,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:19:21,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:19:21,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:19:21,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:19:21,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:19:21" (1/1) ... [2020-12-22 08:19:21,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@433496c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:21, skipping insertion in model container [2020-12-22 08:19:21,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:19:21" (1/1) ... [2020-12-22 08:19:21,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:19:21,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:19:22,189 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[8231,8244] [2020-12-22 08:19:22,283 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15416,15429] [2020-12-22 08:19:22,313 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[17613,17626] [2020-12-22 08:19:22,329 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[18637,18650] [2020-12-22 08:19:22,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:19:22,648 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:19:22,728 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[8231,8244] [2020-12-22 08:19:22,758 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15416,15429] [2020-12-22 08:19:22,765 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[17613,17626] [2020-12-22 08:19:22,769 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[18637,18650] [2020-12-22 08:19:22,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:19:22,968 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:19:22,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:22 WrapperNode [2020-12-22 08:19:22,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:19:22,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:19:22,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:19:22,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:19:22,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:22" (1/1) ... [2020-12-22 08:19:23,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:22" (1/1) ... [2020-12-22 08:19:23,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:19:23,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:19:23,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:19:23,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:19:23,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:22" (1/1) ... [2020-12-22 08:19:23,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:22" (1/1) ... [2020-12-22 08:19:23,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:22" (1/1) ... [2020-12-22 08:19:23,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:22" (1/1) ... [2020-12-22 08:19:23,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:22" (1/1) ... [2020-12-22 08:19:23,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:22" (1/1) ... [2020-12-22 08:19:23,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:22" (1/1) ... [2020-12-22 08:19:23,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:19:23,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:19:23,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:19:23,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:19:23,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:19:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:19:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:19:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:19:23,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:19:25,401 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:19:25,401 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:19:25,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:19:25 BoogieIcfgContainer [2020-12-22 08:19:25,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:19:25,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:19:25,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:19:25,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:19:25,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:19:21" (1/3) ... [2020-12-22 08:19:25,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574bd979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:19:25, skipping insertion in model container [2020-12-22 08:19:25,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:22" (2/3) ... [2020-12-22 08:19:25,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574bd979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:19:25, skipping insertion in model container [2020-12-22 08:19:25,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:19:25" (3/3) ... [2020-12-22 08:19:25,412 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-12-22 08:19:25,419 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:19:25,425 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-22 08:19:25,444 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-22 08:19:25,473 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:19:25,474 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:19:25,474 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:19:25,474 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:19:25,474 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:19:25,474 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:19:25,475 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:19:25,475 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:19:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states. [2020-12-22 08:19:25,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:19:25,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:25,517 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] [2020-12-22 08:19:25,517 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:25,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:25,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1707798208, now seen corresponding path program 1 times [2020-12-22 08:19:25,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:25,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285186305] [2020-12-22 08:19:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:25,967 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 08:19:25,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285186305] [2020-12-22 08:19:25,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:25,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:25,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231571631] [2020-12-22 08:19:25,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:25,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:25,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:25,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:25,996 INFO L87 Difference]: Start difference. First operand 457 states. Second operand 3 states. [2020-12-22 08:19:26,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:26,163 INFO L93 Difference]: Finished difference Result 725 states and 1271 transitions. [2020-12-22 08:19:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:26,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 08:19:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:26,200 INFO L225 Difference]: With dead ends: 725 [2020-12-22 08:19:26,201 INFO L226 Difference]: Without dead ends: 571 [2020-12-22 08:19:26,206 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 08:19:26,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-12-22 08:19:26,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 565. [2020-12-22 08:19:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2020-12-22 08:19:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 754 transitions. [2020-12-22 08:19:26,331 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 754 transitions. Word has length 51 [2020-12-22 08:19:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:26,332 INFO L481 AbstractCegarLoop]: Abstraction has 565 states and 754 transitions. [2020-12-22 08:19:26,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 754 transitions. [2020-12-22 08:19:26,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:19:26,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:26,343 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] [2020-12-22 08:19:26,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:19:26,345 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:26,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1349444518, now seen corresponding path program 1 times [2020-12-22 08:19:26,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:26,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692981058] [2020-12-22 08:19:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:26,540 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 08:19:26,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692981058] [2020-12-22 08:19:26,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:26,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:26,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847461686] [2020-12-22 08:19:26,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:26,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:26,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:26,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:26,545 INFO L87 Difference]: Start difference. First operand 565 states and 754 transitions. Second operand 3 states. [2020-12-22 08:19:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:26,683 INFO L93 Difference]: Finished difference Result 994 states and 1379 transitions. [2020-12-22 08:19:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:26,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 08:19:26,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:26,689 INFO L225 Difference]: With dead ends: 994 [2020-12-22 08:19:26,689 INFO L226 Difference]: Without dead ends: 781 [2020-12-22 08:19:26,694 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 08:19:26,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-12-22 08:19:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 774. [2020-12-22 08:19:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 774 states. [2020-12-22 08:19:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1056 transitions. [2020-12-22 08:19:26,735 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1056 transitions. Word has length 51 [2020-12-22 08:19:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:26,736 INFO L481 AbstractCegarLoop]: Abstraction has 774 states and 1056 transitions. [2020-12-22 08:19:26,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1056 transitions. [2020-12-22 08:19:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:19:26,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:26,741 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] [2020-12-22 08:19:26,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:19:26,742 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:26,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:26,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1493728400, now seen corresponding path program 1 times [2020-12-22 08:19:26,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:26,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787668716] [2020-12-22 08:19:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:26,900 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 08:19:26,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787668716] [2020-12-22 08:19:26,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:26,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:19:26,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512353360] [2020-12-22 08:19:26,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:26,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:26,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:26,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:26,906 INFO L87 Difference]: Start difference. First operand 774 states and 1056 transitions. Second operand 5 states. [2020-12-22 08:19:27,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:27,343 INFO L93 Difference]: Finished difference Result 1716 states and 2415 transitions. [2020-12-22 08:19:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:27,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-22 08:19:27,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:27,349 INFO L225 Difference]: With dead ends: 1716 [2020-12-22 08:19:27,350 INFO L226 Difference]: Without dead ends: 1059 [2020-12-22 08:19:27,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:19:27,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2020-12-22 08:19:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1053. [2020-12-22 08:19:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1053 states. [2020-12-22 08:19:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1478 transitions. [2020-12-22 08:19:27,404 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1478 transitions. Word has length 51 [2020-12-22 08:19:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:27,404 INFO L481 AbstractCegarLoop]: Abstraction has 1053 states and 1478 transitions. [2020-12-22 08:19:27,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:19:27,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1478 transitions. [2020-12-22 08:19:27,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:19:27,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:27,407 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] [2020-12-22 08:19:27,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:19:27,407 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:27,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:27,408 INFO L82 PathProgramCache]: Analyzing trace with hash -358090099, now seen corresponding path program 1 times [2020-12-22 08:19:27,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:27,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262605881] [2020-12-22 08:19:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:27,476 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 08:19:27,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262605881] [2020-12-22 08:19:27,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:27,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:27,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303707963] [2020-12-22 08:19:27,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:27,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:27,479 INFO L87 Difference]: Start difference. First operand 1053 states and 1478 transitions. Second operand 3 states. [2020-12-22 08:19:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:27,599 INFO L93 Difference]: Finished difference Result 2099 states and 2965 transitions. [2020-12-22 08:19:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:27,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 08:19:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:27,608 INFO L225 Difference]: With dead ends: 2099 [2020-12-22 08:19:27,608 INFO L226 Difference]: Without dead ends: 1399 [2020-12-22 08:19:27,610 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 08:19:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2020-12-22 08:19:27,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1385. [2020-12-22 08:19:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1385 states. [2020-12-22 08:19:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 1895 transitions. [2020-12-22 08:19:27,697 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 1895 transitions. Word has length 52 [2020-12-22 08:19:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:27,697 INFO L481 AbstractCegarLoop]: Abstraction has 1385 states and 1895 transitions. [2020-12-22 08:19:27,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 1895 transitions. [2020-12-22 08:19:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:19:27,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:27,700 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] [2020-12-22 08:19:27,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:19:27,701 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1296606516, now seen corresponding path program 1 times [2020-12-22 08:19:27,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:27,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349884335] [2020-12-22 08:19:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:27,810 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 08:19:27,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349884335] [2020-12-22 08:19:27,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:27,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:27,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160857036] [2020-12-22 08:19:27,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:19:27,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:27,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:19:27,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:19:27,814 INFO L87 Difference]: Start difference. First operand 1385 states and 1895 transitions. Second operand 6 states. [2020-12-22 08:19:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:28,359 INFO L93 Difference]: Finished difference Result 3667 states and 5106 transitions. [2020-12-22 08:19:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:28,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 08:19:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:28,372 INFO L225 Difference]: With dead ends: 3667 [2020-12-22 08:19:28,372 INFO L226 Difference]: Without dead ends: 2454 [2020-12-22 08:19:28,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:19:28,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2020-12-22 08:19:28,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2430. [2020-12-22 08:19:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2430 states. [2020-12-22 08:19:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 3383 transitions. [2020-12-22 08:19:28,552 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 3383 transitions. Word has length 52 [2020-12-22 08:19:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:28,555 INFO L481 AbstractCegarLoop]: Abstraction has 2430 states and 3383 transitions. [2020-12-22 08:19:28,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:19:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 3383 transitions. [2020-12-22 08:19:28,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:19:28,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:28,558 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] [2020-12-22 08:19:28,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:19:28,558 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:28,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:28,559 INFO L82 PathProgramCache]: Analyzing trace with hash -482685133, now seen corresponding path program 1 times [2020-12-22 08:19:28,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:28,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000769531] [2020-12-22 08:19:28,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:28,683 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 08:19:28,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000769531] [2020-12-22 08:19:28,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:28,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:28,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212549711] [2020-12-22 08:19:28,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:19:28,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:28,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:19:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:19:28,686 INFO L87 Difference]: Start difference. First operand 2430 states and 3383 transitions. Second operand 6 states. [2020-12-22 08:19:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:29,363 INFO L93 Difference]: Finished difference Result 7034 states and 9875 transitions. [2020-12-22 08:19:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:29,364 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 08:19:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:29,387 INFO L225 Difference]: With dead ends: 7034 [2020-12-22 08:19:29,387 INFO L226 Difference]: Without dead ends: 4776 [2020-12-22 08:19:29,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:19:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4776 states. [2020-12-22 08:19:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4776 to 4731. [2020-12-22 08:19:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4731 states. [2020-12-22 08:19:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4731 states to 4731 states and 6619 transitions. [2020-12-22 08:19:29,717 INFO L78 Accepts]: Start accepts. Automaton has 4731 states and 6619 transitions. Word has length 53 [2020-12-22 08:19:29,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:29,717 INFO L481 AbstractCegarLoop]: Abstraction has 4731 states and 6619 transitions. [2020-12-22 08:19:29,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:19:29,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4731 states and 6619 transitions. [2020-12-22 08:19:29,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:19:29,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:29,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:29,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:19:29,726 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:29,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1630046103, now seen corresponding path program 1 times [2020-12-22 08:19:29,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:29,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383657591] [2020-12-22 08:19:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:29,903 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 08:19:29,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383657591] [2020-12-22 08:19:29,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:29,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:19:29,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728573381] [2020-12-22 08:19:29,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:19:29,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:29,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:19:29,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:19:29,907 INFO L87 Difference]: Start difference. First operand 4731 states and 6619 transitions. Second operand 7 states. [2020-12-22 08:19:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:31,473 INFO L93 Difference]: Finished difference Result 15840 states and 22453 transitions. [2020-12-22 08:19:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:19:31,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-12-22 08:19:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:31,553 INFO L225 Difference]: With dead ends: 15840 [2020-12-22 08:19:31,553 INFO L226 Difference]: Without dead ends: 13686 [2020-12-22 08:19:31,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:19:31,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13686 states. [2020-12-22 08:19:32,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13686 to 4745. [2020-12-22 08:19:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4745 states. [2020-12-22 08:19:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4745 states to 4745 states and 6637 transitions. [2020-12-22 08:19:32,102 INFO L78 Accepts]: Start accepts. Automaton has 4745 states and 6637 transitions. Word has length 54 [2020-12-22 08:19:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:32,103 INFO L481 AbstractCegarLoop]: Abstraction has 4745 states and 6637 transitions. [2020-12-22 08:19:32,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:19:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4745 states and 6637 transitions. [2020-12-22 08:19:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:19:32,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:32,107 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] [2020-12-22 08:19:32,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:19:32,107 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:32,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1470909546, now seen corresponding path program 1 times [2020-12-22 08:19:32,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:32,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064701471] [2020-12-22 08:19:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:32,236 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 08:19:32,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064701471] [2020-12-22 08:19:32,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:32,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:19:32,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095085736] [2020-12-22 08:19:32,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:19:32,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:32,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:19:32,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:19:32,239 INFO L87 Difference]: Start difference. First operand 4745 states and 6637 transitions. Second operand 7 states. [2020-12-22 08:19:34,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:34,245 INFO L93 Difference]: Finished difference Result 17593 states and 25014 transitions. [2020-12-22 08:19:34,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:19:34,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-12-22 08:19:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:34,295 INFO L225 Difference]: With dead ends: 17593 [2020-12-22 08:19:34,295 INFO L226 Difference]: Without dead ends: 15708 [2020-12-22 08:19:34,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:19:34,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15708 states. [2020-12-22 08:19:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15708 to 4767. [2020-12-22 08:19:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4767 states. [2020-12-22 08:19:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4767 states to 4767 states and 6668 transitions. [2020-12-22 08:19:34,928 INFO L78 Accepts]: Start accepts. Automaton has 4767 states and 6668 transitions. Word has length 54 [2020-12-22 08:19:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:34,929 INFO L481 AbstractCegarLoop]: Abstraction has 4767 states and 6668 transitions. [2020-12-22 08:19:34,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:19:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 4767 states and 6668 transitions. [2020-12-22 08:19:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:19:34,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:34,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:34,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:19:34,933 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:34,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash 269556297, now seen corresponding path program 1 times [2020-12-22 08:19:34,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:34,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542251626] [2020-12-22 08:19:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:35,063 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 08:19:35,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542251626] [2020-12-22 08:19:35,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:35,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:19:35,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865890739] [2020-12-22 08:19:35,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:19:35,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:35,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:19:35,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:19:35,067 INFO L87 Difference]: Start difference. First operand 4767 states and 6668 transitions. Second operand 7 states. [2020-12-22 08:19:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:37,536 INFO L93 Difference]: Finished difference Result 23383 states and 33171 transitions. [2020-12-22 08:19:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:19:37,536 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-12-22 08:19:37,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:37,589 INFO L225 Difference]: With dead ends: 23383 [2020-12-22 08:19:37,590 INFO L226 Difference]: Without dead ends: 20988 [2020-12-22 08:19:37,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:19:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20988 states. [2020-12-22 08:19:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20988 to 4801. [2020-12-22 08:19:38,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4801 states. [2020-12-22 08:19:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4801 states to 4801 states and 6712 transitions. [2020-12-22 08:19:38,235 INFO L78 Accepts]: Start accepts. Automaton has 4801 states and 6712 transitions. Word has length 54 [2020-12-22 08:19:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:38,235 INFO L481 AbstractCegarLoop]: Abstraction has 4801 states and 6712 transitions. [2020-12-22 08:19:38,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:19:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4801 states and 6712 transitions. [2020-12-22 08:19:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:19:38,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:38,238 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] [2020-12-22 08:19:38,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:19:38,239 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:38,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:38,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1866987345, now seen corresponding path program 1 times [2020-12-22 08:19:38,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:38,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840256380] [2020-12-22 08:19:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:38,448 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 08:19:38,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840256380] [2020-12-22 08:19:38,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:38,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:19:38,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213657278] [2020-12-22 08:19:38,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 08:19:38,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:38,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 08:19:38,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:19:38,450 INFO L87 Difference]: Start difference. First operand 4801 states and 6712 transitions. Second operand 8 states. [2020-12-22 08:19:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:40,273 INFO L93 Difference]: Finished difference Result 12478 states and 17733 transitions. [2020-12-22 08:19:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:19:40,273 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-12-22 08:19:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:40,291 INFO L225 Difference]: With dead ends: 12478 [2020-12-22 08:19:40,291 INFO L226 Difference]: Without dead ends: 8728 [2020-12-22 08:19:40,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-22 08:19:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8728 states. [2020-12-22 08:19:40,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8728 to 4644. [2020-12-22 08:19:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4644 states. [2020-12-22 08:19:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4644 states to 4644 states and 6506 transitions. [2020-12-22 08:19:40,875 INFO L78 Accepts]: Start accepts. Automaton has 4644 states and 6506 transitions. Word has length 55 [2020-12-22 08:19:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:40,875 INFO L481 AbstractCegarLoop]: Abstraction has 4644 states and 6506 transitions. [2020-12-22 08:19:40,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 08:19:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4644 states and 6506 transitions. [2020-12-22 08:19:40,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:19:40,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:40,879 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] [2020-12-22 08:19:40,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:19:40,879 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:40,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:40,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1508633655, now seen corresponding path program 1 times [2020-12-22 08:19:40,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:40,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830946244] [2020-12-22 08:19:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:41,089 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 08:19:41,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830946244] [2020-12-22 08:19:41,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:41,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:19:41,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017935210] [2020-12-22 08:19:41,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:19:41,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:41,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:19:41,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:19:41,094 INFO L87 Difference]: Start difference. First operand 4644 states and 6506 transitions. Second operand 9 states. [2020-12-22 08:19:44,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:44,441 INFO L93 Difference]: Finished difference Result 20878 states and 29797 transitions. [2020-12-22 08:19:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 08:19:44,441 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-12-22 08:19:44,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:44,474 INFO L225 Difference]: With dead ends: 20878 [2020-12-22 08:19:44,474 INFO L226 Difference]: Without dead ends: 17498 [2020-12-22 08:19:44,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2020-12-22 08:19:44,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17498 states. [2020-12-22 08:19:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17498 to 4610. [2020-12-22 08:19:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4610 states. [2020-12-22 08:19:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 6460 transitions. [2020-12-22 08:19:45,128 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 6460 transitions. Word has length 55 [2020-12-22 08:19:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:45,128 INFO L481 AbstractCegarLoop]: Abstraction has 4610 states and 6460 transitions. [2020-12-22 08:19:45,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:19:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 6460 transitions. [2020-12-22 08:19:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:19:45,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:45,132 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] [2020-12-22 08:19:45,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:19:45,132 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:45,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1235712110, now seen corresponding path program 1 times [2020-12-22 08:19:45,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:45,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289527351] [2020-12-22 08:19:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:45,270 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 08:19:45,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289527351] [2020-12-22 08:19:45,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:45,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:19:45,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016031904] [2020-12-22 08:19:45,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:19:45,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:45,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:19:45,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:19:45,272 INFO L87 Difference]: Start difference. First operand 4610 states and 6460 transitions. Second operand 9 states. [2020-12-22 08:19:47,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:47,856 INFO L93 Difference]: Finished difference Result 10515 states and 14997 transitions. [2020-12-22 08:19:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:19:47,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-12-22 08:19:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:47,872 INFO L225 Difference]: With dead ends: 10515 [2020-12-22 08:19:47,872 INFO L226 Difference]: Without dead ends: 10510 [2020-12-22 08:19:47,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:19:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10510 states. [2020-12-22 08:19:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10510 to 4610. [2020-12-22 08:19:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4610 states. [2020-12-22 08:19:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 6458 transitions. [2020-12-22 08:19:48,591 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 6458 transitions. Word has length 55 [2020-12-22 08:19:48,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:48,591 INFO L481 AbstractCegarLoop]: Abstraction has 4610 states and 6458 transitions. [2020-12-22 08:19:48,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:19:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 6458 transitions. [2020-12-22 08:19:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:19:48,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:48,595 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] [2020-12-22 08:19:48,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:19:48,595 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:48,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1411677613, now seen corresponding path program 1 times [2020-12-22 08:19:48,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:48,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316486552] [2020-12-22 08:19:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:48,644 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 08:19:48,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316486552] [2020-12-22 08:19:48,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:48,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:48,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136858289] [2020-12-22 08:19:48,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:48,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:48,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:48,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:48,646 INFO L87 Difference]: Start difference. First operand 4610 states and 6458 transitions. Second operand 3 states. [2020-12-22 08:19:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:49,342 INFO L93 Difference]: Finished difference Result 6641 states and 9351 transitions. [2020-12-22 08:19:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:49,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 08:19:49,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:49,351 INFO L225 Difference]: With dead ends: 6641 [2020-12-22 08:19:49,351 INFO L226 Difference]: Without dead ends: 4617 [2020-12-22 08:19:49,355 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 08:19:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2020-12-22 08:19:50,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 4610. [2020-12-22 08:19:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4610 states. [2020-12-22 08:19:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 6383 transitions. [2020-12-22 08:19:50,145 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 6383 transitions. Word has length 56 [2020-12-22 08:19:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:50,146 INFO L481 AbstractCegarLoop]: Abstraction has 4610 states and 6383 transitions. [2020-12-22 08:19:50,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 6383 transitions. [2020-12-22 08:19:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:19:50,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:50,148 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] [2020-12-22 08:19:50,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:19:50,148 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:50,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1038080617, now seen corresponding path program 1 times [2020-12-22 08:19:50,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:50,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62858580] [2020-12-22 08:19:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:50,220 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 08:19:50,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62858580] [2020-12-22 08:19:50,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:50,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:50,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139350010] [2020-12-22 08:19:50,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:50,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:50,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:50,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:50,223 INFO L87 Difference]: Start difference. First operand 4610 states and 6383 transitions. Second operand 3 states. [2020-12-22 08:19:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:50,712 INFO L93 Difference]: Finished difference Result 6701 states and 9317 transitions. [2020-12-22 08:19:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:50,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 08:19:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:50,720 INFO L225 Difference]: With dead ends: 6701 [2020-12-22 08:19:50,720 INFO L226 Difference]: Without dead ends: 4616 [2020-12-22 08:19:50,724 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 08:19:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4616 states. [2020-12-22 08:19:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4616 to 4610. [2020-12-22 08:19:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4610 states. [2020-12-22 08:19:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 6313 transitions. [2020-12-22 08:19:51,372 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 6313 transitions. Word has length 56 [2020-12-22 08:19:51,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:51,372 INFO L481 AbstractCegarLoop]: Abstraction has 4610 states and 6313 transitions. [2020-12-22 08:19:51,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:51,372 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 6313 transitions. [2020-12-22 08:19:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:19:51,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:51,375 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] [2020-12-22 08:19:51,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:19:51,375 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1735355720, now seen corresponding path program 1 times [2020-12-22 08:19:51,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:51,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59345956] [2020-12-22 08:19:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:51,421 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 08:19:51,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59345956] [2020-12-22 08:19:51,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:51,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:51,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945331394] [2020-12-22 08:19:51,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:51,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:51,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:51,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:51,424 INFO L87 Difference]: Start difference. First operand 4610 states and 6313 transitions. Second operand 3 states. [2020-12-22 08:19:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:51,927 INFO L93 Difference]: Finished difference Result 7147 states and 9815 transitions. [2020-12-22 08:19:51,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:51,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 08:19:51,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:51,932 INFO L225 Difference]: With dead ends: 7147 [2020-12-22 08:19:51,932 INFO L226 Difference]: Without dead ends: 4576 [2020-12-22 08:19:51,936 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 08:19:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4576 states. [2020-12-22 08:19:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4576 to 4570. [2020-12-22 08:19:52,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4570 states. [2020-12-22 08:19:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 6168 transitions. [2020-12-22 08:19:52,463 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 6168 transitions. Word has length 56 [2020-12-22 08:19:52,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:52,464 INFO L481 AbstractCegarLoop]: Abstraction has 4570 states and 6168 transitions. [2020-12-22 08:19:52,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 6168 transitions. [2020-12-22 08:19:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:19:52,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:52,467 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] [2020-12-22 08:19:52,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:19:52,468 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:52,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:52,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1293695138, now seen corresponding path program 1 times [2020-12-22 08:19:52,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:52,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081024138] [2020-12-22 08:19:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:52,505 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 08:19:52,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081024138] [2020-12-22 08:19:52,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:52,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:52,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495103006] [2020-12-22 08:19:52,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:52,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:52,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:52,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:52,508 INFO L87 Difference]: Start difference. First operand 4570 states and 6168 transitions. Second operand 3 states. [2020-12-22 08:19:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:53,641 INFO L93 Difference]: Finished difference Result 8439 states and 11493 transitions. [2020-12-22 08:19:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:53,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-22 08:19:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:53,647 INFO L225 Difference]: With dead ends: 8439 [2020-12-22 08:19:53,648 INFO L226 Difference]: Without dead ends: 5707 [2020-12-22 08:19:53,651 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 08:19:53,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2020-12-22 08:19:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 4187. [2020-12-22 08:19:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4187 states. [2020-12-22 08:19:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 5666 transitions. [2020-12-22 08:19:54,121 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 5666 transitions. Word has length 57 [2020-12-22 08:19:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:54,121 INFO L481 AbstractCegarLoop]: Abstraction has 4187 states and 5666 transitions. [2020-12-22 08:19:54,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 5666 transitions. [2020-12-22 08:19:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:19:54,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:54,124 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] [2020-12-22 08:19:54,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:19:54,125 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:54,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1073895861, now seen corresponding path program 1 times [2020-12-22 08:19:54,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:54,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502430723] [2020-12-22 08:19:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:55,036 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 08:19:55,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502430723] [2020-12-22 08:19:55,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:55,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-12-22 08:19:55,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959292283] [2020-12-22 08:19:55,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 08:19:55,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:55,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 08:19:55,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 08:19:55,040 INFO L87 Difference]: Start difference. First operand 4187 states and 5666 transitions. Second operand 19 states. [2020-12-22 08:19:55,272 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-12-22 08:19:56,034 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-12-22 08:19:56,289 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-12-22 08:19:56,636 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 08:19:56,978 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 08:20:02,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:02,557 INFO L93 Difference]: Finished difference Result 12391 states and 17161 transitions. [2020-12-22 08:20:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 08:20:02,558 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 58 [2020-12-22 08:20:02,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:02,573 INFO L225 Difference]: With dead ends: 12391 [2020-12-22 08:20:02,574 INFO L226 Difference]: Without dead ends: 12387 [2020-12-22 08:20:02,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 08:20:02,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12387 states. [2020-12-22 08:20:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12387 to 4199. [2020-12-22 08:20:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-12-22 08:20:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 5683 transitions. [2020-12-22 08:20:03,252 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 5683 transitions. Word has length 58 [2020-12-22 08:20:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:03,252 INFO L481 AbstractCegarLoop]: Abstraction has 4199 states and 5683 transitions. [2020-12-22 08:20:03,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 08:20:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 5683 transitions. [2020-12-22 08:20:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:20:03,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:03,255 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] [2020-12-22 08:20:03,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:20:03,256 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:03,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1243428052, now seen corresponding path program 1 times [2020-12-22 08:20:03,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:03,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955608611] [2020-12-22 08:20:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:03,874 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 08:20:03,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955608611] [2020-12-22 08:20:03,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:03,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-12-22 08:20:03,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623778223] [2020-12-22 08:20:03,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 08:20:03,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:03,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 08:20:03,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-12-22 08:20:03,876 INFO L87 Difference]: Start difference. First operand 4199 states and 5683 transitions. Second operand 19 states. [2020-12-22 08:20:04,128 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-12-22 08:20:04,928 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 08:20:05,219 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-22 08:20:05,625 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:20:06,051 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:20:06,275 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 08:20:06,473 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-22 08:20:06,644 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:20:06,893 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 08:20:07,194 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 08:20:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:10,977 INFO L93 Difference]: Finished difference Result 10915 states and 15105 transitions. [2020-12-22 08:20:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 08:20:10,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 58 [2020-12-22 08:20:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:10,987 INFO L225 Difference]: With dead ends: 10915 [2020-12-22 08:20:10,987 INFO L226 Difference]: Without dead ends: 10909 [2020-12-22 08:20:10,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 08:20:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2020-12-22 08:20:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 4199. [2020-12-22 08:20:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-12-22 08:20:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 5682 transitions. [2020-12-22 08:20:11,630 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 5682 transitions. Word has length 58 [2020-12-22 08:20:11,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:11,630 INFO L481 AbstractCegarLoop]: Abstraction has 4199 states and 5682 transitions. [2020-12-22 08:20:11,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 08:20:11,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 5682 transitions. [2020-12-22 08:20:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:20:11,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:11,633 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] [2020-12-22 08:20:11,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:20:11,633 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1776503256, now seen corresponding path program 1 times [2020-12-22 08:20:11,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:11,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383929793] [2020-12-22 08:20:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:12,576 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 08:20:12,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383929793] [2020-12-22 08:20:12,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:12,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-12-22 08:20:12,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431311204] [2020-12-22 08:20:12,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 08:20:12,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:12,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 08:20:12,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-12-22 08:20:12,579 INFO L87 Difference]: Start difference. First operand 4199 states and 5682 transitions. Second operand 16 states. [2020-12-22 08:20:12,854 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-12-22 08:20:13,165 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-12-22 08:20:13,388 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-12-22 08:20:13,662 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-12-22 08:20:13,997 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-12-22 08:20:14,380 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-12-22 08:20:14,891 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-12-22 08:20:15,507 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-12-22 08:20:15,926 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 08:20:16,384 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-12-22 08:20:16,704 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-12-22 08:20:17,143 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 08:20:17,700 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-12-22 08:20:18,054 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-12-22 08:20:20,094 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 08:20:20,943 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 08:20:23,183 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-12-22 08:20:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:23,636 INFO L93 Difference]: Finished difference Result 14047 states and 19387 transitions. [2020-12-22 08:20:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 08:20:23,637 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-12-22 08:20:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:23,650 INFO L225 Difference]: With dead ends: 14047 [2020-12-22 08:20:23,650 INFO L226 Difference]: Without dead ends: 13849 [2020-12-22 08:20:23,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=299, Invalid=961, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 08:20:23,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13849 states. [2020-12-22 08:20:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13849 to 4192. [2020-12-22 08:20:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4192 states. [2020-12-22 08:20:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4192 states to 4192 states and 5673 transitions. [2020-12-22 08:20:24,503 INFO L78 Accepts]: Start accepts. Automaton has 4192 states and 5673 transitions. Word has length 58 [2020-12-22 08:20:24,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:24,503 INFO L481 AbstractCegarLoop]: Abstraction has 4192 states and 5673 transitions. [2020-12-22 08:20:24,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 08:20:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 4192 states and 5673 transitions. [2020-12-22 08:20:24,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:20:24,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:24,506 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] [2020-12-22 08:20:24,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:20:24,506 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:24,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:24,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1779959307, now seen corresponding path program 1 times [2020-12-22 08:20:24,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:24,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111777684] [2020-12-22 08:20:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:25,087 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 08:20:25,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111777684] [2020-12-22 08:20:25,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:25,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-12-22 08:20:25,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968029955] [2020-12-22 08:20:25,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 08:20:25,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 08:20:25,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 08:20:25,089 INFO L87 Difference]: Start difference. First operand 4192 states and 5673 transitions. Second operand 19 states. [2020-12-22 08:20:25,270 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-12-22 08:20:26,060 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 08:20:27,130 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:20:33,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:33,380 INFO L93 Difference]: Finished difference Result 11461 states and 15872 transitions. [2020-12-22 08:20:33,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 08:20:33,381 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 58 [2020-12-22 08:20:33,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:33,391 INFO L225 Difference]: With dead ends: 11461 [2020-12-22 08:20:33,391 INFO L226 Difference]: Without dead ends: 11457 [2020-12-22 08:20:33,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 08:20:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11457 states. [2020-12-22 08:20:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11457 to 4192. [2020-12-22 08:20:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4192 states. [2020-12-22 08:20:34,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4192 states to 4192 states and 5672 transitions. [2020-12-22 08:20:34,270 INFO L78 Accepts]: Start accepts. Automaton has 4192 states and 5672 transitions. Word has length 58 [2020-12-22 08:20:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:34,271 INFO L481 AbstractCegarLoop]: Abstraction has 4192 states and 5672 transitions. [2020-12-22 08:20:34,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 08:20:34,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4192 states and 5672 transitions. [2020-12-22 08:20:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:20:34,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:34,274 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] [2020-12-22 08:20:34,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:20:34,274 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:34,275 INFO L82 PathProgramCache]: Analyzing trace with hash 225212176, now seen corresponding path program 1 times [2020-12-22 08:20:34,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:34,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200615473] [2020-12-22 08:20:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:34,311 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 08:20:34,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200615473] [2020-12-22 08:20:34,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:34,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:34,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51650796] [2020-12-22 08:20:34,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:34,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:34,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:34,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:34,313 INFO L87 Difference]: Start difference. First operand 4192 states and 5672 transitions. Second operand 3 states. [2020-12-22 08:20:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:35,579 INFO L93 Difference]: Finished difference Result 8123 states and 11132 transitions. [2020-12-22 08:20:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:35,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-12-22 08:20:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:35,585 INFO L225 Difference]: With dead ends: 8123 [2020-12-22 08:20:35,585 INFO L226 Difference]: Without dead ends: 5821 [2020-12-22 08:20:35,587 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 08:20:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5821 states. [2020-12-22 08:20:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5821 to 4088. [2020-12-22 08:20:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4088 states. [2020-12-22 08:20:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 5537 transitions. [2020-12-22 08:20:36,479 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 5537 transitions. Word has length 58 [2020-12-22 08:20:36,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:36,479 INFO L481 AbstractCegarLoop]: Abstraction has 4088 states and 5537 transitions. [2020-12-22 08:20:36,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 5537 transitions. [2020-12-22 08:20:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:20:36,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:36,482 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] [2020-12-22 08:20:36,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:20:36,482 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:36,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2035062764, now seen corresponding path program 1 times [2020-12-22 08:20:36,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:36,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511775766] [2020-12-22 08:20:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:36,514 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 08:20:36,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511775766] [2020-12-22 08:20:36,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:36,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:36,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980206973] [2020-12-22 08:20:36,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:36,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:36,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:36,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:36,516 INFO L87 Difference]: Start difference. First operand 4088 states and 5537 transitions. Second operand 3 states. [2020-12-22 08:20:37,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:37,894 INFO L93 Difference]: Finished difference Result 8056 states and 11025 transitions. [2020-12-22 08:20:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:37,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-12-22 08:20:37,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:37,902 INFO L225 Difference]: With dead ends: 8056 [2020-12-22 08:20:37,903 INFO L226 Difference]: Without dead ends: 5772 [2020-12-22 08:20:37,905 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 08:20:37,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2020-12-22 08:20:38,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 4039. [2020-12-22 08:20:38,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4039 states. [2020-12-22 08:20:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4039 states to 4039 states and 5464 transitions. [2020-12-22 08:20:38,947 INFO L78 Accepts]: Start accepts. Automaton has 4039 states and 5464 transitions. Word has length 58 [2020-12-22 08:20:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:38,947 INFO L481 AbstractCegarLoop]: Abstraction has 4039 states and 5464 transitions. [2020-12-22 08:20:38,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 4039 states and 5464 transitions. [2020-12-22 08:20:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:20:38,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:38,949 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] [2020-12-22 08:20:38,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:20:38,950 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:38,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1606353326, now seen corresponding path program 1 times [2020-12-22 08:20:38,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:38,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262518141] [2020-12-22 08:20:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:39,696 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 08:20:39,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262518141] [2020-12-22 08:20:39,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:39,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-12-22 08:20:39,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221019605] [2020-12-22 08:20:39,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 08:20:39,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:39,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 08:20:39,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-12-22 08:20:39,698 INFO L87 Difference]: Start difference. First operand 4039 states and 5464 transitions. Second operand 16 states. [2020-12-22 08:20:40,328 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-12-22 08:20:40,618 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-12-22 08:20:40,888 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-12-22 08:20:41,275 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-12-22 08:20:41,627 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-12-22 08:20:41,774 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 08:20:42,049 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-12-22 08:20:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:47,908 INFO L93 Difference]: Finished difference Result 10098 states and 13867 transitions. [2020-12-22 08:20:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 08:20:47,909 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-12-22 08:20:47,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:47,917 INFO L225 Difference]: With dead ends: 10098 [2020-12-22 08:20:47,917 INFO L226 Difference]: Without dead ends: 10094 [2020-12-22 08:20:47,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 08:20:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10094 states. [2020-12-22 08:20:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10094 to 4035. [2020-12-22 08:20:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4035 states. [2020-12-22 08:20:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 5460 transitions. [2020-12-22 08:20:49,024 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 5460 transitions. Word has length 59 [2020-12-22 08:20:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:49,024 INFO L481 AbstractCegarLoop]: Abstraction has 4035 states and 5460 transitions. [2020-12-22 08:20:49,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 08:20:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 5460 transitions. [2020-12-22 08:20:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:20:49,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:49,026 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] [2020-12-22 08:20:49,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:20:49,026 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:49,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1766707224, now seen corresponding path program 1 times [2020-12-22 08:20:49,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:49,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109693544] [2020-12-22 08:20:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:49,442 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 08:20:49,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109693544] [2020-12-22 08:20:49,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:49,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-12-22 08:20:49,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646046327] [2020-12-22 08:20:49,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 08:20:49,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:49,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 08:20:49,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-12-22 08:20:49,444 INFO L87 Difference]: Start difference. First operand 4035 states and 5460 transitions. Second operand 14 states. [2020-12-22 08:20:50,079 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-12-22 08:20:50,224 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-12-22 08:20:50,451 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-12-22 08:20:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:56,413 INFO L93 Difference]: Finished difference Result 12377 states and 17058 transitions. [2020-12-22 08:20:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 08:20:56,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-12-22 08:20:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:56,424 INFO L225 Difference]: With dead ends: 12377 [2020-12-22 08:20:56,424 INFO L226 Difference]: Without dead ends: 11837 [2020-12-22 08:20:56,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=204, Invalid=498, Unknown=0, NotChecked=0, Total=702 [2020-12-22 08:20:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2020-12-22 08:20:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 3993. [2020-12-22 08:20:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3993 states. [2020-12-22 08:20:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 5408 transitions. [2020-12-22 08:20:57,611 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 5408 transitions. Word has length 59 [2020-12-22 08:20:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:57,612 INFO L481 AbstractCegarLoop]: Abstraction has 3993 states and 5408 transitions. [2020-12-22 08:20:57,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 08:20:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 5408 transitions. [2020-12-22 08:20:57,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:20:57,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:57,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:57,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:20:57,615 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:57,615 INFO L82 PathProgramCache]: Analyzing trace with hash 590074057, now seen corresponding path program 1 times [2020-12-22 08:20:57,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:57,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72906648] [2020-12-22 08:20:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:57,665 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 08:20:57,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72906648] [2020-12-22 08:20:57,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:57,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:57,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309427472] [2020-12-22 08:20:57,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:57,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:57,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:57,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:57,667 INFO L87 Difference]: Start difference. First operand 3993 states and 5408 transitions. Second operand 3 states. [2020-12-22 08:20:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:59,789 INFO L93 Difference]: Finished difference Result 9292 states and 12736 transitions. [2020-12-22 08:20:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:59,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 08:20:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:59,797 INFO L225 Difference]: With dead ends: 9292 [2020-12-22 08:20:59,797 INFO L226 Difference]: Without dead ends: 6270 [2020-12-22 08:20:59,800 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 08:20:59,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6270 states. [2020-12-22 08:21:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6270 to 6268. [2020-12-22 08:21:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6268 states. [2020-12-22 08:21:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6268 states to 6268 states and 8439 transitions. [2020-12-22 08:21:01,759 INFO L78 Accepts]: Start accepts. Automaton has 6268 states and 8439 transitions. Word has length 68 [2020-12-22 08:21:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:01,759 INFO L481 AbstractCegarLoop]: Abstraction has 6268 states and 8439 transitions. [2020-12-22 08:21:01,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6268 states and 8439 transitions. [2020-12-22 08:21:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:21:01,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:01,763 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] [2020-12-22 08:21:01,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:21:01,764 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:01,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1666510355, now seen corresponding path program 1 times [2020-12-22 08:21:01,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:01,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634262744] [2020-12-22 08:21:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:01,838 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 08:21:01,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634262744] [2020-12-22 08:21:01,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:01,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:21:01,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670393991] [2020-12-22 08:21:01,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:21:01,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:01,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:21:01,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:21:01,840 INFO L87 Difference]: Start difference. First operand 6268 states and 8439 transitions. Second operand 5 states. [2020-12-22 08:21:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:03,624 INFO L93 Difference]: Finished difference Result 6274 states and 8442 transitions. [2020-12-22 08:21:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:21:03,625 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 08:21:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:03,629 INFO L225 Difference]: With dead ends: 6274 [2020-12-22 08:21:03,629 INFO L226 Difference]: Without dead ends: 5452 [2020-12-22 08:21:03,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:21:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5452 states. [2020-12-22 08:21:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5452 to 5448. [2020-12-22 08:21:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5448 states. [2020-12-22 08:21:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 7346 transitions. [2020-12-22 08:21:05,323 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 7346 transitions. Word has length 69 [2020-12-22 08:21:05,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:05,324 INFO L481 AbstractCegarLoop]: Abstraction has 5448 states and 7346 transitions. [2020-12-22 08:21:05,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:21:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 7346 transitions. [2020-12-22 08:21:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:21:05,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:05,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:05,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:21:05,327 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:05,327 INFO L82 PathProgramCache]: Analyzing trace with hash -533504505, now seen corresponding path program 1 times [2020-12-22 08:21:05,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:05,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383932612] [2020-12-22 08:21:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:05,374 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 08:21:05,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383932612] [2020-12-22 08:21:05,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:05,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:05,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823972156] [2020-12-22 08:21:05,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:05,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:05,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:05,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:05,376 INFO L87 Difference]: Start difference. First operand 5448 states and 7346 transitions. Second operand 3 states. [2020-12-22 08:21:08,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:08,778 INFO L93 Difference]: Finished difference Result 14268 states and 19388 transitions. [2020-12-22 08:21:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:08,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 08:21:08,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:08,787 INFO L225 Difference]: With dead ends: 14268 [2020-12-22 08:21:08,787 INFO L226 Difference]: Without dead ends: 9500 [2020-12-22 08:21:08,792 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 08:21:08,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9500 states. [2020-12-22 08:21:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9500 to 8878. [2020-12-22 08:21:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8878 states. [2020-12-22 08:21:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8878 states to 8878 states and 11937 transitions. [2020-12-22 08:21:11,705 INFO L78 Accepts]: Start accepts. Automaton has 8878 states and 11937 transitions. Word has length 70 [2020-12-22 08:21:11,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:11,705 INFO L481 AbstractCegarLoop]: Abstraction has 8878 states and 11937 transitions. [2020-12-22 08:21:11,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 8878 states and 11937 transitions. [2020-12-22 08:21:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:21:11,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:11,708 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] [2020-12-22 08:21:11,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 08:21:11,708 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:11,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1110878122, now seen corresponding path program 1 times [2020-12-22 08:21:11,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:11,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194903041] [2020-12-22 08:21:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:11,754 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 08:21:11,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194903041] [2020-12-22 08:21:11,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:11,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:11,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292201074] [2020-12-22 08:21:11,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:11,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:11,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:11,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:11,756 INFO L87 Difference]: Start difference. First operand 8878 states and 11937 transitions. Second operand 3 states. [2020-12-22 08:21:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:17,376 INFO L93 Difference]: Finished difference Result 24370 states and 32887 transitions. [2020-12-22 08:21:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:17,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 08:21:17,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:17,395 INFO L225 Difference]: With dead ends: 24370 [2020-12-22 08:21:17,395 INFO L226 Difference]: Without dead ends: 16198 [2020-12-22 08:21:17,403 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 08:21:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16198 states. [2020-12-22 08:21:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16198 to 14960. [2020-12-22 08:21:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14960 states. [2020-12-22 08:21:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14960 states to 14960 states and 20023 transitions. [2020-12-22 08:21:22,635 INFO L78 Accepts]: Start accepts. Automaton has 14960 states and 20023 transitions. Word has length 71 [2020-12-22 08:21:22,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:22,636 INFO L481 AbstractCegarLoop]: Abstraction has 14960 states and 20023 transitions. [2020-12-22 08:21:22,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 14960 states and 20023 transitions. [2020-12-22 08:21:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:21:22,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:22,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:22,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 08:21:22,638 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:22,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:22,638 INFO L82 PathProgramCache]: Analyzing trace with hash -396168239, now seen corresponding path program 1 times [2020-12-22 08:21:22,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:22,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619266151] [2020-12-22 08:21:22,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:22,681 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 08:21:22,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619266151] [2020-12-22 08:21:22,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:22,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:22,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999191732] [2020-12-22 08:21:22,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:22,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:22,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:22,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:22,683 INFO L87 Difference]: Start difference. First operand 14960 states and 20023 transitions. Second operand 3 states. [2020-12-22 08:21:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:32,520 INFO L93 Difference]: Finished difference Result 41764 states and 55825 transitions. [2020-12-22 08:21:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:32,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 08:21:32,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:32,562 INFO L225 Difference]: With dead ends: 41764 [2020-12-22 08:21:32,563 INFO L226 Difference]: Without dead ends: 27510 [2020-12-22 08:21:32,579 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 08:21:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27510 states. [2020-12-22 08:21:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27510 to 25036. [2020-12-22 08:21:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25036 states. [2020-12-22 08:21:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25036 states to 25036 states and 33147 transitions. [2020-12-22 08:21:42,025 INFO L78 Accepts]: Start accepts. Automaton has 25036 states and 33147 transitions. Word has length 73 [2020-12-22 08:21:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:42,025 INFO L481 AbstractCegarLoop]: Abstraction has 25036 states and 33147 transitions. [2020-12-22 08:21:42,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 25036 states and 33147 transitions. [2020-12-22 08:21:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 08:21:42,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:42,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:42,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 08:21:42,027 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:42,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1606128063, now seen corresponding path program 1 times [2020-12-22 08:21:42,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:42,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889325481] [2020-12-22 08:21:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:42,165 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 08:21:42,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889325481] [2020-12-22 08:21:42,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:42,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:21:42,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324379268] [2020-12-22 08:21:42,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:21:42,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:21:42,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:21:42,167 INFO L87 Difference]: Start difference. First operand 25036 states and 33147 transitions. Second operand 6 states. [2020-12-22 08:21:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:58,757 INFO L93 Difference]: Finished difference Result 43758 states and 57165 transitions. [2020-12-22 08:21:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 08:21:58,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-12-22 08:21:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:58,799 INFO L225 Difference]: With dead ends: 43758 [2020-12-22 08:21:58,799 INFO L226 Difference]: Without dead ends: 43756 [2020-12-22 08:21:58,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:21:58,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43756 states. [2020-12-22 08:22:08,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43756 to 26404. [2020-12-22 08:22:08,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26404 states. [2020-12-22 08:22:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26404 states to 26404 states and 34515 transitions. [2020-12-22 08:22:08,774 INFO L78 Accepts]: Start accepts. Automaton has 26404 states and 34515 transitions. Word has length 75 [2020-12-22 08:22:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:08,774 INFO L481 AbstractCegarLoop]: Abstraction has 26404 states and 34515 transitions. [2020-12-22 08:22:08,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:22:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 26404 states and 34515 transitions. [2020-12-22 08:22:08,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 08:22:08,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:08,776 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] [2020-12-22 08:22:08,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 08:22:08,776 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:08,777 INFO L82 PathProgramCache]: Analyzing trace with hash 824153179, now seen corresponding path program 1 times [2020-12-22 08:22:08,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:08,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351655883] [2020-12-22 08:22:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:08,820 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 08:22:08,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351655883] [2020-12-22 08:22:08,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:08,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:22:08,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098772346] [2020-12-22 08:22:08,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:22:08,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:08,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:22:08,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:22:08,822 INFO L87 Difference]: Start difference. First operand 26404 states and 34515 transitions. Second operand 3 states. [2020-12-22 08:22:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:23,706 INFO L93 Difference]: Finished difference Result 64676 states and 84181 transitions. [2020-12-22 08:22:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:22:23,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 08:22:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:23,748 INFO L225 Difference]: With dead ends: 64676 [2020-12-22 08:22:23,748 INFO L226 Difference]: Without dead ends: 38978 [2020-12-22 08:22:23,764 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 08:22:23,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38978 states. [2020-12-22 08:22:38,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38978 to 38976. [2020-12-22 08:22:38,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38976 states. [2020-12-22 08:22:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38976 states to 38976 states and 50239 transitions. [2020-12-22 08:22:38,476 INFO L78 Accepts]: Start accepts. Automaton has 38976 states and 50239 transitions. Word has length 76 [2020-12-22 08:22:38,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:38,476 INFO L481 AbstractCegarLoop]: Abstraction has 38976 states and 50239 transitions. [2020-12-22 08:22:38,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:22:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 38976 states and 50239 transitions. [2020-12-22 08:22:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:22:38,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:38,484 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:22:38,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 08:22:38,485 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1593588101, now seen corresponding path program 1 times [2020-12-22 08:22:38,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:38,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278610603] [2020-12-22 08:22:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:22:38,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278610603] [2020-12-22 08:22:38,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285542093] [2020-12-22 08:22:38,627 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 08:22:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:38,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 08:22:38,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:22:39,193 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 08:22:39,610 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-12-22 08:22:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:22:39,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:22:39,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 13 [2020-12-22 08:22:39,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727939699] [2020-12-22 08:22:39,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 08:22:39,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:39,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 08:22:39,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:22:39,660 INFO L87 Difference]: Start difference. First operand 38976 states and 50239 transitions. Second operand 13 states.