/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:30:35,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:30:35,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:30:35,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:30:35,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:30:35,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:30:35,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:30:35,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:30:35,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:30:35,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:30:36,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:30:36,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:30:36,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:30:36,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:30:36,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:30:36,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:30:36,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:30:36,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:30:36,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:30:36,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:30:36,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:30:36,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:30:36,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:30:36,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:30:36,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:30:36,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:30:36,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:30:36,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:30:36,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 12:30:36,049 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:30:36,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:30:36,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:30:36,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:30:36,051 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:30:36,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:30:36,052 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:30:36,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:30:36,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:30:36,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:30:36,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:30:36,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:30:36,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:30:36,053 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:30:36,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:30:36,054 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:30:36,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:30:36,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:30:36,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:30:36,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:30:36,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:30:36,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:30:36,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:30:36,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:30:36,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:30:36,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:30:36,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:36,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:30:36,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:30:36,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 12:30:36,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:30:36,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:30:36,421 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:30:36,423 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:30:36,423 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:30:36,424 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 12:30:36,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fa4f9f17/cc1fa96cd8a6403ea8a3e2f4daaebccd/FLAGaf5e688d1 [2020-07-20 12:30:37,124 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:30:37,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 12:30:37,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fa4f9f17/cc1fa96cd8a6403ea8a3e2f4daaebccd/FLAGaf5e688d1 [2020-07-20 12:30:37,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fa4f9f17/cc1fa96cd8a6403ea8a3e2f4daaebccd [2020-07-20 12:30:37,271 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:30:37,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:30:37,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:30:37,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:30:37,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:30:37,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:30:37" (1/1) ... [2020-07-20 12:30:37,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@687b19bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:37, skipping insertion in model container [2020-07-20 12:30:37,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:30:37" (1/1) ... [2020-07-20 12:30:37,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:30:37,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:30:38,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:30:38,460 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:30:38,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:30:39,019 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:30:39,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:39 WrapperNode [2020-07-20 12:30:39,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:30:39,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:30:39,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:30:39,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:30:39,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:39" (1/1) ... [2020-07-20 12:30:39,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:39" (1/1) ... [2020-07-20 12:30:39,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:39" (1/1) ... [2020-07-20 12:30:39,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:39" (1/1) ... [2020-07-20 12:30:39,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:39" (1/1) ... [2020-07-20 12:30:39,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:39" (1/1) ... [2020-07-20 12:30:39,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:39" (1/1) ... [2020-07-20 12:30:39,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:30:39,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:30:39,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:30:39,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:30:39,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:39" (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 [2020-07-20 12:30:39,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:30:39,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:30:39,297 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:30:39,298 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:30:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:30:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 12:30:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 12:30:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 12:30:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:30:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:30:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 12:30:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 12:30:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 12:30:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 12:30:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 12:30:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 12:30:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 12:30:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 12:30:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:30:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:30:39,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:30:42,234 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:30:42,234 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 12:30:42,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:30:42 BoogieIcfgContainer [2020-07-20 12:30:42,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:30:42,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:30:42,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:30:42,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:30:42,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:30:37" (1/3) ... [2020-07-20 12:30:42,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b29f106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:30:42, skipping insertion in model container [2020-07-20 12:30:42,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:39" (2/3) ... [2020-07-20 12:30:42,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b29f106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:30:42, skipping insertion in model container [2020-07-20 12:30:42,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:30:42" (3/3) ... [2020-07-20 12:30:42,263 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 12:30:42,275 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:30:42,290 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:30:42,305 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:30:42,341 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:30:42,342 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:30:42,342 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:30:42,342 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:30:42,342 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:30:42,342 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:30:42,343 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:30:42,343 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:30:42,390 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-20 12:30:42,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 12:30:42,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:42,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:42,420 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:42,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-20 12:30:42,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:42,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035215517] [2020-07-20 12:30:42,437 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:42,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:30:42,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:30:43,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:43,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035215517] [2020-07-20 12:30:43,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:43,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:30:43,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170424786] [2020-07-20 12:30:43,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:30:43,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:43,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:30:43,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:30:43,345 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-20 12:30:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:43,638 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-07-20 12:30:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:30:43,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-20 12:30:43,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:43,668 INFO L225 Difference]: With dead ends: 2333 [2020-07-20 12:30:43,668 INFO L226 Difference]: Without dead ends: 1545 [2020-07-20 12:30:43,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:30:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-07-20 12:30:43,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-07-20 12:30:43,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-07-20 12:30:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-07-20 12:30:43,817 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-07-20 12:30:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:43,818 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-07-20 12:30:43,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:30:43,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-07-20 12:30:43,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 12:30:43,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:43,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:44,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:44,044 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:44,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-07-20 12:30:44,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:44,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709757860] [2020-07-20 12:30:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:44,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:30:44,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:30:44,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:44,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709757860] [2020-07-20 12:30:44,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:44,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:44,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133643729] [2020-07-20 12:30:44,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:44,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:44,635 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 3 states. [2020-07-20 12:30:44,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:44,829 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-07-20 12:30:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:44,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 12:30:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:44,846 INFO L225 Difference]: With dead ends: 4438 [2020-07-20 12:30:44,847 INFO L226 Difference]: Without dead ends: 3024 [2020-07-20 12:30:44,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-07-20 12:30:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-07-20 12:30:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-07-20 12:30:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-07-20 12:30:44,980 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-07-20 12:30:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:44,981 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-07-20 12:30:44,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-07-20 12:30:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 12:30:44,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:44,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:45,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:45,209 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:45,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:45,210 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-07-20 12:30:45,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:45,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558861472] [2020-07-20 12:30:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:45,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 2106 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:30:45,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:30:45,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:45,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558861472] [2020-07-20 12:30:45,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:45,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:45,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591829685] [2020-07-20 12:30:45,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:45,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:45,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:45,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:45,676 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 3 states. [2020-07-20 12:30:45,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:45,929 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-07-20 12:30:45,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:45,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 12:30:45,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:45,956 INFO L225 Difference]: With dead ends: 8991 [2020-07-20 12:30:45,956 INFO L226 Difference]: Without dead ends: 6011 [2020-07-20 12:30:45,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:45,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-07-20 12:30:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-07-20 12:30:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-07-20 12:30:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-07-20 12:30:46,116 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-07-20 12:30:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:46,116 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-07-20 12:30:46,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-07-20 12:30:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 12:30:46,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:46,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:46,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:46,342 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:46,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:46,343 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-07-20 12:30:46,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:46,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507701812] [2020-07-20 12:30:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:46,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:30:46,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:30:46,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:46,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507701812] [2020-07-20 12:30:46,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:46,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:46,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444891822] [2020-07-20 12:30:46,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:46,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:46,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:46,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:46,831 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 3 states. [2020-07-20 12:30:47,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:47,070 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-07-20 12:30:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:47,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-20 12:30:47,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:47,107 INFO L225 Difference]: With dead ends: 9010 [2020-07-20 12:30:47,107 INFO L226 Difference]: Without dead ends: 6029 [2020-07-20 12:30:47,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:47,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-07-20 12:30:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-07-20 12:30:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-07-20 12:30:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-07-20 12:30:47,296 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-07-20 12:30:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:47,297 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-07-20 12:30:47,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:47,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-07-20 12:30:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 12:30:47,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:47,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:47,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:47,522 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:47,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:47,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-07-20 12:30:47,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:47,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151199770] [2020-07-20 12:30:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:47,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:30:47,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:30:47,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:47,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151199770] [2020-07-20 12:30:47,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:47,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:47,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029968123] [2020-07-20 12:30:47,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:47,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:47,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:47,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:47,987 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 3 states. [2020-07-20 12:30:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:48,233 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-07-20 12:30:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:48,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 12:30:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:48,262 INFO L225 Difference]: With dead ends: 8718 [2020-07-20 12:30:48,262 INFO L226 Difference]: Without dead ends: 5904 [2020-07-20 12:30:48,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-07-20 12:30:48,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-07-20 12:30:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-07-20 12:30:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-07-20 12:30:48,531 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-07-20 12:30:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:48,532 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-07-20 12:30:48,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-07-20 12:30:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 12:30:48,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:48,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:48,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:48,764 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:48,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:48,764 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-07-20 12:30:48,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:48,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486062937] [2020-07-20 12:30:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:49,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 2108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:30:49,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:30:49,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:49,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486062937] [2020-07-20 12:30:49,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:49,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:30:49,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580398253] [2020-07-20 12:30:49,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:30:49,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:30:49,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:30:49,299 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 4 states. [2020-07-20 12:30:49,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:49,663 INFO L93 Difference]: Finished difference Result 16157 states and 24615 transitions. [2020-07-20 12:30:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:30:49,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-20 12:30:49,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:49,703 INFO L225 Difference]: With dead ends: 16157 [2020-07-20 12:30:49,703 INFO L226 Difference]: Without dead ends: 10795 [2020-07-20 12:30:49,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:30:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2020-07-20 12:30:50,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 6137. [2020-07-20 12:30:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6137 states. [2020-07-20 12:30:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6137 states to 6137 states and 9444 transitions. [2020-07-20 12:30:50,069 INFO L78 Accepts]: Start accepts. Automaton has 6137 states and 9444 transitions. Word has length 328 [2020-07-20 12:30:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:50,069 INFO L479 AbstractCegarLoop]: Abstraction has 6137 states and 9444 transitions. [2020-07-20 12:30:50,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:30:50,069 INFO L276 IsEmpty]: Start isEmpty. Operand 6137 states and 9444 transitions. [2020-07-20 12:30:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 12:30:50,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:50,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:50,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:50,297 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:50,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:50,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1740117251, now seen corresponding path program 1 times [2020-07-20 12:30:50,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:50,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995467119] [2020-07-20 12:30:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:50,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2113 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:30:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:30:50,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:50,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995467119] [2020-07-20 12:30:50,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:50,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:50,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305791766] [2020-07-20 12:30:50,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:50,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:50,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:50,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:50,679 INFO L87 Difference]: Start difference. First operand 6137 states and 9444 transitions. Second operand 3 states. [2020-07-20 12:30:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:51,069 INFO L93 Difference]: Finished difference Result 16841 states and 25613 transitions. [2020-07-20 12:30:51,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:51,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 12:30:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:51,095 INFO L225 Difference]: With dead ends: 16841 [2020-07-20 12:30:51,096 INFO L226 Difference]: Without dead ends: 11507 [2020-07-20 12:30:51,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11507 states. [2020-07-20 12:30:51,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11507 to 6241. [2020-07-20 12:30:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6241 states. [2020-07-20 12:30:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6241 states to 6241 states and 9587 transitions. [2020-07-20 12:30:51,517 INFO L78 Accepts]: Start accepts. Automaton has 6241 states and 9587 transitions. Word has length 330 [2020-07-20 12:30:51,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:51,518 INFO L479 AbstractCegarLoop]: Abstraction has 6241 states and 9587 transitions. [2020-07-20 12:30:51,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:51,518 INFO L276 IsEmpty]: Start isEmpty. Operand 6241 states and 9587 transitions. [2020-07-20 12:30:51,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 12:30:51,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:51,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:51,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:51,746 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:51,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:51,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1227056241, now seen corresponding path program 1 times [2020-07-20 12:30:51,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:51,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620574862] [2020-07-20 12:30:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:52,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 2128 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:30:52,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:30:52,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:52,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620574862] [2020-07-20 12:30:52,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:52,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:30:52,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41064694] [2020-07-20 12:30:52,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:30:52,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:52,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:30:52,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:30:52,300 INFO L87 Difference]: Start difference. First operand 6241 states and 9587 transitions. Second operand 8 states. [2020-07-20 12:30:54,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:54,439 INFO L93 Difference]: Finished difference Result 15832 states and 24500 transitions. [2020-07-20 12:30:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:30:54,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 330 [2020-07-20 12:30:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:54,466 INFO L225 Difference]: With dead ends: 15832 [2020-07-20 12:30:54,467 INFO L226 Difference]: Without dead ends: 11586 [2020-07-20 12:30:54,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:30:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2020-07-20 12:30:54,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 8093. [2020-07-20 12:30:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8093 states. [2020-07-20 12:30:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8093 states to 8093 states and 12299 transitions. [2020-07-20 12:30:54,942 INFO L78 Accepts]: Start accepts. Automaton has 8093 states and 12299 transitions. Word has length 330 [2020-07-20 12:30:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:54,943 INFO L479 AbstractCegarLoop]: Abstraction has 8093 states and 12299 transitions. [2020-07-20 12:30:54,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:30:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 8093 states and 12299 transitions. [2020-07-20 12:30:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 12:30:55,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:55,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:55,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:55,212 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1247460253, now seen corresponding path program 1 times [2020-07-20 12:30:55,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:55,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015524922] [2020-07-20 12:30:55,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:55,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:30:55,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:30:55,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:55,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015524922] [2020-07-20 12:30:55,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:55,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:55,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711817066] [2020-07-20 12:30:55,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:55,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:55,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:55,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:55,638 INFO L87 Difference]: Start difference. First operand 8093 states and 12299 transitions. Second operand 3 states. [2020-07-20 12:30:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:56,051 INFO L93 Difference]: Finished difference Result 16173 states and 24573 transitions. [2020-07-20 12:30:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:56,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 12:30:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:56,073 INFO L225 Difference]: With dead ends: 16173 [2020-07-20 12:30:56,074 INFO L226 Difference]: Without dead ends: 9971 [2020-07-20 12:30:56,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9971 states. [2020-07-20 12:30:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9971 to 8633. [2020-07-20 12:30:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8633 states. [2020-07-20 12:30:56,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 13191 transitions. [2020-07-20 12:30:56,684 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 13191 transitions. Word has length 330 [2020-07-20 12:30:56,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:56,684 INFO L479 AbstractCegarLoop]: Abstraction has 8633 states and 13191 transitions. [2020-07-20 12:30:56,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:56,684 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 13191 transitions. [2020-07-20 12:30:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 12:30:56,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:56,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:56,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:56,910 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:56,910 INFO L82 PathProgramCache]: Analyzing trace with hash -763365383, now seen corresponding path program 1 times [2020-07-20 12:30:56,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:56,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032784311] [2020-07-20 12:30:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:57,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:30:57,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:30:57,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:57,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032784311] [2020-07-20 12:30:57,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:57,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:57,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795964300] [2020-07-20 12:30:57,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:57,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:57,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:57,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:57,329 INFO L87 Difference]: Start difference. First operand 8633 states and 13191 transitions. Second operand 3 states. [2020-07-20 12:30:58,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:58,431 INFO L93 Difference]: Finished difference Result 24149 states and 36591 transitions. [2020-07-20 12:30:58,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:58,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-20 12:30:58,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:58,458 INFO L225 Difference]: With dead ends: 24149 [2020-07-20 12:30:58,458 INFO L226 Difference]: Without dead ends: 16416 [2020-07-20 12:30:58,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:58,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16416 states. [2020-07-20 12:30:58,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16416 to 8758. [2020-07-20 12:30:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8758 states. [2020-07-20 12:30:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8758 states to 8758 states and 13337 transitions. [2020-07-20 12:30:58,942 INFO L78 Accepts]: Start accepts. Automaton has 8758 states and 13337 transitions. Word has length 331 [2020-07-20 12:30:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:58,942 INFO L479 AbstractCegarLoop]: Abstraction has 8758 states and 13337 transitions. [2020-07-20 12:30:58,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 8758 states and 13337 transitions. [2020-07-20 12:30:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 12:30:58,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:58,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:59,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:59,157 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:59,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2000347144, now seen corresponding path program 1 times [2020-07-20 12:30:59,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:59,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999752420] [2020-07-20 12:30:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:59,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 2123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:30:59,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:30:59,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:59,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999752420] [2020-07-20 12:30:59,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:59,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:30:59,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168874134] [2020-07-20 12:30:59,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:30:59,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:59,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:30:59,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:30:59,810 INFO L87 Difference]: Start difference. First operand 8758 states and 13337 transitions. Second operand 8 states. [2020-07-20 12:31:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:01,654 INFO L93 Difference]: Finished difference Result 19643 states and 30271 transitions. [2020-07-20 12:31:01,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:31:01,654 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2020-07-20 12:31:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:01,674 INFO L225 Difference]: With dead ends: 19643 [2020-07-20 12:31:01,675 INFO L226 Difference]: Without dead ends: 16573 [2020-07-20 12:31:01,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:31:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16573 states. [2020-07-20 12:31:02,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16573 to 10457. [2020-07-20 12:31:02,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10457 states. [2020-07-20 12:31:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10457 states to 10457 states and 15924 transitions. [2020-07-20 12:31:02,322 INFO L78 Accepts]: Start accepts. Automaton has 10457 states and 15924 transitions. Word has length 332 [2020-07-20 12:31:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:02,322 INFO L479 AbstractCegarLoop]: Abstraction has 10457 states and 15924 transitions. [2020-07-20 12:31:02,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:31:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand 10457 states and 15924 transitions. [2020-07-20 12:31:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 12:31:02,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:02,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:31:02,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:02,532 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:02,533 INFO L82 PathProgramCache]: Analyzing trace with hash -160876658, now seen corresponding path program 1 times [2020-07-20 12:31:02,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:02,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675013349] [2020-07-20 12:31:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:02,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:31:02,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:31:02,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:02,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675013349] [2020-07-20 12:31:02,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:02,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:31:02,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630325523] [2020-07-20 12:31:02,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:31:02,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:02,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:31:02,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:31:02,965 INFO L87 Difference]: Start difference. First operand 10457 states and 15924 transitions. Second operand 3 states. [2020-07-20 12:31:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:03,731 INFO L93 Difference]: Finished difference Result 22162 states and 33933 transitions. [2020-07-20 12:31:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:31:03,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-20 12:31:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:03,747 INFO L225 Difference]: With dead ends: 22162 [2020-07-20 12:31:03,747 INFO L226 Difference]: Without dead ends: 14009 [2020-07-20 12:31:03,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:31:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14009 states. [2020-07-20 12:31:04,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14009 to 12559. [2020-07-20 12:31:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12559 states. [2020-07-20 12:31:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12559 states to 12559 states and 19294 transitions. [2020-07-20 12:31:04,323 INFO L78 Accepts]: Start accepts. Automaton has 12559 states and 19294 transitions. Word has length 332 [2020-07-20 12:31:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:04,323 INFO L479 AbstractCegarLoop]: Abstraction has 12559 states and 19294 transitions. [2020-07-20 12:31:04,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:31:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 12559 states and 19294 transitions. [2020-07-20 12:31:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 12:31:04,332 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:04,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:31:04,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:04,533 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:04,534 INFO L82 PathProgramCache]: Analyzing trace with hash 26974230, now seen corresponding path program 1 times [2020-07-20 12:31:04,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:04,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856472681] [2020-07-20 12:31:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:04,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 2115 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:31:04,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:31:04,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:04,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856472681] [2020-07-20 12:31:04,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:04,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:31:04,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015535951] [2020-07-20 12:31:04,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:31:04,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:04,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:31:04,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:31:04,951 INFO L87 Difference]: Start difference. First operand 12559 states and 19294 transitions. Second operand 4 states. [2020-07-20 12:31:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:05,582 INFO L93 Difference]: Finished difference Result 23174 states and 35485 transitions. [2020-07-20 12:31:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:31:05,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 12:31:05,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:05,601 INFO L225 Difference]: With dead ends: 23174 [2020-07-20 12:31:05,601 INFO L226 Difference]: Without dead ends: 11478 [2020-07-20 12:31:05,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:31:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11478 states. [2020-07-20 12:31:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11478 to 11458. [2020-07-20 12:31:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11458 states. [2020-07-20 12:31:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 17608 transitions. [2020-07-20 12:31:06,183 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 17608 transitions. Word has length 332 [2020-07-20 12:31:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:06,183 INFO L479 AbstractCegarLoop]: Abstraction has 11458 states and 17608 transitions. [2020-07-20 12:31:06,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:31:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 17608 transitions. [2020-07-20 12:31:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 12:31:06,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:06,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:31:06,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:06,400 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:06,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:06,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1537943031, now seen corresponding path program 1 times [2020-07-20 12:31:06,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:06,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973524428] [2020-07-20 12:31:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:06,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:31:06,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:31:06,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:06,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973524428] [2020-07-20 12:31:06,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:06,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:31:06,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493118387] [2020-07-20 12:31:06,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:31:06,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:06,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:31:06,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:31:06,864 INFO L87 Difference]: Start difference. First operand 11458 states and 17608 transitions. Second operand 4 states. [2020-07-20 12:31:08,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:08,004 INFO L93 Difference]: Finished difference Result 26120 states and 40662 transitions. [2020-07-20 12:31:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:31:08,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-20 12:31:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:08,029 INFO L225 Difference]: With dead ends: 26120 [2020-07-20 12:31:08,029 INFO L226 Difference]: Without dead ends: 20527 [2020-07-20 12:31:08,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:31:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20527 states. [2020-07-20 12:31:09,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20527 to 20525. [2020-07-20 12:31:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20525 states. [2020-07-20 12:31:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20525 states to 20525 states and 31568 transitions. [2020-07-20 12:31:09,802 INFO L78 Accepts]: Start accepts. Automaton has 20525 states and 31568 transitions. Word has length 333 [2020-07-20 12:31:09,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:09,803 INFO L479 AbstractCegarLoop]: Abstraction has 20525 states and 31568 transitions. [2020-07-20 12:31:09,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:31:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 20525 states and 31568 transitions. [2020-07-20 12:31:09,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 12:31:09,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:09,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:31:10,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:10,014 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:10,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:10,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1942664128, now seen corresponding path program 1 times [2020-07-20 12:31:10,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:10,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27953215] [2020-07-20 12:31:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:10,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 2125 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:31:10,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:31:10,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:10,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27953215] [2020-07-20 12:31:10,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:10,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:31:10,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106350313] [2020-07-20 12:31:10,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:31:10,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:10,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:31:10,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:31:10,492 INFO L87 Difference]: Start difference. First operand 20525 states and 31568 transitions. Second operand 4 states. [2020-07-20 12:31:12,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:12,475 INFO L93 Difference]: Finished difference Result 60368 states and 92806 transitions. [2020-07-20 12:31:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:31:12,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-20 12:31:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:12,516 INFO L225 Difference]: With dead ends: 60368 [2020-07-20 12:31:12,516 INFO L226 Difference]: Without dead ends: 39915 [2020-07-20 12:31:12,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:31:12,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39915 states. [2020-07-20 12:31:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39915 to 39913. [2020-07-20 12:31:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39913 states. [2020-07-20 12:31:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39913 states to 39913 states and 61083 transitions. [2020-07-20 12:31:15,746 INFO L78 Accepts]: Start accepts. Automaton has 39913 states and 61083 transitions. Word has length 333 [2020-07-20 12:31:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:15,747 INFO L479 AbstractCegarLoop]: Abstraction has 39913 states and 61083 transitions. [2020-07-20 12:31:15,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:31:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 39913 states and 61083 transitions. [2020-07-20 12:31:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 12:31:15,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:15,763 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:31:15,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:15,964 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:15,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:15,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1906330768, now seen corresponding path program 1 times [2020-07-20 12:31:15,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:15,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718640202] [2020-07-20 12:31:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:16,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 2128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:31:16,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:31:16,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:16,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718640202] [2020-07-20 12:31:16,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:16,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:31:16,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847654900] [2020-07-20 12:31:16,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:31:16,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:16,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:31:16,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:31:16,459 INFO L87 Difference]: Start difference. First operand 39913 states and 61083 transitions. Second operand 3 states. [2020-07-20 12:31:20,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:20,585 INFO L93 Difference]: Finished difference Result 116533 states and 178115 transitions. [2020-07-20 12:31:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:31:20,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-20 12:31:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:20,675 INFO L225 Difference]: With dead ends: 116533 [2020-07-20 12:31:20,675 INFO L226 Difference]: Without dead ends: 77869 [2020-07-20 12:31:20,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:31:20,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77869 states. [2020-07-20 12:31:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77869 to 77867. [2020-07-20 12:31:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77867 states. [2020-07-20 12:31:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77867 states to 77867 states and 118696 transitions. [2020-07-20 12:31:26,383 INFO L78 Accepts]: Start accepts. Automaton has 77867 states and 118696 transitions. Word has length 335 [2020-07-20 12:31:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:26,384 INFO L479 AbstractCegarLoop]: Abstraction has 77867 states and 118696 transitions. [2020-07-20 12:31:26,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:31:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 77867 states and 118696 transitions. [2020-07-20 12:31:26,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 12:31:26,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:26,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:31:26,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:26,639 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:26,640 INFO L82 PathProgramCache]: Analyzing trace with hash -496610298, now seen corresponding path program 1 times [2020-07-20 12:31:26,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:26,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394690421] [2020-07-20 12:31:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:26,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 2129 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:31:26,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:31:27,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:27,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394690421] [2020-07-20 12:31:27,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:27,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:31:27,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930314261] [2020-07-20 12:31:27,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:31:27,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:27,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:31:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:31:27,212 INFO L87 Difference]: Start difference. First operand 77867 states and 118696 transitions. Second operand 8 states. [2020-07-20 12:31:39,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:39,622 INFO L93 Difference]: Finished difference Result 194089 states and 298278 transitions. [2020-07-20 12:31:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:31:39,623 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 336 [2020-07-20 12:31:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:39,810 INFO L225 Difference]: With dead ends: 194089 [2020-07-20 12:31:39,810 INFO L226 Difference]: Without dead ends: 174805 [2020-07-20 12:31:39,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:31:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174805 states. [2020-07-20 12:31:46,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174805 to 94535. [2020-07-20 12:31:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94535 states. [2020-07-20 12:31:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94535 states to 94535 states and 144036 transitions. [2020-07-20 12:31:46,319 INFO L78 Accepts]: Start accepts. Automaton has 94535 states and 144036 transitions. Word has length 336 [2020-07-20 12:31:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:46,320 INFO L479 AbstractCegarLoop]: Abstraction has 94535 states and 144036 transitions. [2020-07-20 12:31:46,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:31:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 94535 states and 144036 transitions. [2020-07-20 12:31:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 12:31:46,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:46,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:31:46,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:46,560 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:46,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1180141058, now seen corresponding path program 1 times [2020-07-20 12:31:46,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:46,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492319901] [2020-07-20 12:31:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:46,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:31:46,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:31:46,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:46,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492319901] [2020-07-20 12:31:46,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:46,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:31:46,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620265812] [2020-07-20 12:31:46,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:31:46,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:46,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:31:46,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:31:46,964 INFO L87 Difference]: Start difference. First operand 94535 states and 144036 transitions. Second operand 3 states. [2020-07-20 12:31:56,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:56,627 INFO L93 Difference]: Finished difference Result 227675 states and 348798 transitions. [2020-07-20 12:31:56,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:31:56,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 12:31:56,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:56,789 INFO L225 Difference]: With dead ends: 227675 [2020-07-20 12:31:56,790 INFO L226 Difference]: Without dead ends: 140329 [2020-07-20 12:31:56,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:31:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140329 states. [2020-07-20 12:32:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140329 to 127767. [2020-07-20 12:32:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127767 states. [2020-07-20 12:32:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127767 states to 127767 states and 195876 transitions. [2020-07-20 12:32:09,299 INFO L78 Accepts]: Start accepts. Automaton has 127767 states and 195876 transitions. Word has length 336 [2020-07-20 12:32:09,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:09,299 INFO L479 AbstractCegarLoop]: Abstraction has 127767 states and 195876 transitions. [2020-07-20 12:32:09,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 127767 states and 195876 transitions. [2020-07-20 12:32:09,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 12:32:09,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:09,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:09,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:09,531 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:09,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:09,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1940830443, now seen corresponding path program 1 times [2020-07-20 12:32:09,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:09,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740070196] [2020-07-20 12:32:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:09,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:09,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:09,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740070196] [2020-07-20 12:32:09,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:09,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:09,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302243234] [2020-07-20 12:32:09,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:09,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:09,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:09,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:09,988 INFO L87 Difference]: Start difference. First operand 127767 states and 195876 transitions. Second operand 3 states. [2020-07-20 12:32:27,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:27,820 INFO L93 Difference]: Finished difference Result 375740 states and 575792 transitions. [2020-07-20 12:32:27,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:27,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-20 12:32:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:28,144 INFO L225 Difference]: With dead ends: 375740 [2020-07-20 12:32:28,144 INFO L226 Difference]: Without dead ends: 249320 [2020-07-20 12:32:28,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:28,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249320 states. [2020-07-20 12:32:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249320 to 249318. [2020-07-20 12:32:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249318 states. [2020-07-20 12:32:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249318 states to 249318 states and 380307 transitions. [2020-07-20 12:32:50,285 INFO L78 Accepts]: Start accepts. Automaton has 249318 states and 380307 transitions. Word has length 337 [2020-07-20 12:32:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:50,286 INFO L479 AbstractCegarLoop]: Abstraction has 249318 states and 380307 transitions. [2020-07-20 12:32:50,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 249318 states and 380307 transitions. [2020-07-20 12:32:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 12:32:50,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:50,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:50,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:50,570 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:50,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1726977432, now seen corresponding path program 1 times [2020-07-20 12:32:50,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:50,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851340405] [2020-07-20 12:32:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:50,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:32:50,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:50,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:50,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851340405] [2020-07-20 12:32:50,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:50,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:32:50,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798938342] [2020-07-20 12:32:50,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:32:50,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:50,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:32:50,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:32:50,970 INFO L87 Difference]: Start difference. First operand 249318 states and 380307 transitions. Second operand 4 states. [2020-07-20 12:33:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:33:24,936 INFO L93 Difference]: Finished difference Result 678958 states and 1033574 transitions. [2020-07-20 12:33:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:33:24,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 12:33:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:33:25,545 INFO L225 Difference]: With dead ends: 678958 [2020-07-20 12:33:25,545 INFO L226 Difference]: Without dead ends: 432932 [2020-07-20 12:33:25,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:33:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432932 states. [2020-07-20 12:33:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432932 to 243898. [2020-07-20 12:33:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243898 states. [2020-07-20 12:33:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243898 states to 243898 states and 371825 transitions. [2020-07-20 12:33:51,866 INFO L78 Accepts]: Start accepts. Automaton has 243898 states and 371825 transitions. Word has length 337 [2020-07-20 12:33:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:51,866 INFO L479 AbstractCegarLoop]: Abstraction has 243898 states and 371825 transitions. [2020-07-20 12:33:51,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:33:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 243898 states and 371825 transitions. [2020-07-20 12:33:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 12:33:51,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:51,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:33:52,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:52,146 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash 494961172, now seen corresponding path program 1 times [2020-07-20 12:33:52,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:52,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374059716] [2020-07-20 12:33:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:52,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:33:52,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:52,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:52,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374059716] [2020-07-20 12:33:52,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:52,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:33:52,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632834018] [2020-07-20 12:33:52,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:33:52,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:52,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:33:52,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:33:52,544 INFO L87 Difference]: Start difference. First operand 243898 states and 371825 transitions. Second operand 3 states. [2020-07-20 12:34:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:34:29,951 INFO L93 Difference]: Finished difference Result 675356 states and 1028070 transitions. [2020-07-20 12:34:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:34:29,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-20 12:34:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:34:30,642 INFO L225 Difference]: With dead ends: 675356 [2020-07-20 12:34:30,643 INFO L226 Difference]: Without dead ends: 442178 [2020-07-20 12:34:30,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:34:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442178 states. [2020-07-20 12:34:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442178 to 244379. [2020-07-20 12:34:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244379 states. [2020-07-20 12:34:57,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244379 states to 244379 states and 372423 transitions. [2020-07-20 12:34:57,397 INFO L78 Accepts]: Start accepts. Automaton has 244379 states and 372423 transitions. Word has length 340 [2020-07-20 12:34:57,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:34:57,397 INFO L479 AbstractCegarLoop]: Abstraction has 244379 states and 372423 transitions. [2020-07-20 12:34:57,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:34:57,397 INFO L276 IsEmpty]: Start isEmpty. Operand 244379 states and 372423 transitions. [2020-07-20 12:34:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 12:34:57,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:34:57,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:34:57,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:34:57,679 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:34:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:34:57,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1233391883, now seen corresponding path program 1 times [2020-07-20 12:34:57,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:34:57,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846143909] [2020-07-20 12:34:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:34:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:34:58,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 2143 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:34:58,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:34:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:34:58,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:34:58,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846143909] [2020-07-20 12:34:58,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:34:58,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:34:58,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16486504] [2020-07-20 12:34:58,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:34:58,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:34:58,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:34:58,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:34:58,126 INFO L87 Difference]: Start difference. First operand 244379 states and 372423 transitions. Second operand 3 states. [2020-07-20 12:35:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:35:37,709 INFO L93 Difference]: Finished difference Result 668702 states and 1027223 transitions. [2020-07-20 12:35:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:35:37,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-20 12:35:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:35:38,444 INFO L225 Difference]: With dead ends: 668702 [2020-07-20 12:35:38,444 INFO L226 Difference]: Without dead ends: 436857 [2020-07-20 12:35:38,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:35:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436857 states. [2020-07-20 12:36:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436857 to 382255. [2020-07-20 12:36:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382255 states. [2020-07-20 12:36:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382255 states to 382255 states and 595672 transitions. [2020-07-20 12:36:18,692 INFO L78 Accepts]: Start accepts. Automaton has 382255 states and 595672 transitions. Word has length 341 [2020-07-20 12:36:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:18,692 INFO L479 AbstractCegarLoop]: Abstraction has 382255 states and 595672 transitions. [2020-07-20 12:36:18,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:18,693 INFO L276 IsEmpty]: Start isEmpty. Operand 382255 states and 595672 transitions. [2020-07-20 12:36:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 12:36:18,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:18,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:19,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:19,022 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:19,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:19,023 INFO L82 PathProgramCache]: Analyzing trace with hash -253048940, now seen corresponding path program 1 times [2020-07-20 12:36:19,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:19,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313834098] [2020-07-20 12:36:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:19,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 2139 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:36:19,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:19,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:19,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313834098] [2020-07-20 12:36:19,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:19,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:36:19,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211104512] [2020-07-20 12:36:19,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:36:19,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:19,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:36:19,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:36:19,470 INFO L87 Difference]: Start difference. First operand 382255 states and 595672 transitions. Second operand 4 states. [2020-07-20 12:36:54,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:54,002 INFO L93 Difference]: Finished difference Result 718230 states and 1118171 transitions. [2020-07-20 12:36:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:36:54,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 341 [2020-07-20 12:36:54,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:54,601 INFO L225 Difference]: With dead ends: 718230 [2020-07-20 12:36:54,601 INFO L226 Difference]: Without dead ends: 341287 [2020-07-20 12:36:54,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:36:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341287 states. [2020-07-20 12:37:30,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341287 to 340960. [2020-07-20 12:37:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340960 states. [2020-07-20 12:37:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340960 states to 340960 states and 530438 transitions. [2020-07-20 12:37:30,987 INFO L78 Accepts]: Start accepts. Automaton has 340960 states and 530438 transitions. Word has length 341 [2020-07-20 12:37:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:37:30,987 INFO L479 AbstractCegarLoop]: Abstraction has 340960 states and 530438 transitions. [2020-07-20 12:37:30,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:37:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 340960 states and 530438 transitions. [2020-07-20 12:37:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 12:37:31,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:37:31,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:37:31,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:31,261 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:37:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:37:31,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1057024975, now seen corresponding path program 1 times [2020-07-20 12:37:31,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:37:31,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432395875] [2020-07-20 12:37:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:37:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 2153 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:37:32,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:37:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:37:32,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:37:32,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432395875] [2020-07-20 12:37:32,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:37:32,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:37:32,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293895904] [2020-07-20 12:37:32,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:37:32,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:37:32,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:37:32,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:37:32,541 INFO L87 Difference]: Start difference. First operand 340960 states and 530438 transitions. Second operand 3 states. [2020-07-20 12:38:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:38:34,435 INFO L93 Difference]: Finished difference Result 994710 states and 1546472 transitions. [2020-07-20 12:38:34,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:38:34,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-20 12:38:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:38:35,666 INFO L225 Difference]: With dead ends: 994710 [2020-07-20 12:38:35,667 INFO L226 Difference]: Without dead ends: 665512 [2020-07-20 12:38:35,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:38:36,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665512 states. [2020-07-20 12:39:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665512 to 665510. [2020-07-20 12:39:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665510 states. [2020-07-20 12:39:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665510 states to 665510 states and 1027052 transitions. [2020-07-20 12:39:55,290 INFO L78 Accepts]: Start accepts. Automaton has 665510 states and 1027052 transitions. Word has length 342 [2020-07-20 12:39:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:39:55,291 INFO L479 AbstractCegarLoop]: Abstraction has 665510 states and 1027052 transitions. [2020-07-20 12:39:55,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:39:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 665510 states and 1027052 transitions. [2020-07-20 12:39:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 12:39:55,424 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:39:55,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:39:55,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:39:55,625 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:39:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:39:55,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1023408404, now seen corresponding path program 1 times [2020-07-20 12:39:55,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:39:55,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745579953] [2020-07-20 12:39:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:39:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:39:55,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 12:39:55,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:39:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:39:56,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:39:56,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745579953] [2020-07-20 12:39:56,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:39:56,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 12:39:56,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370593992] [2020-07-20 12:39:56,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 12:39:56,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:39:56,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 12:39:56,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 12:39:56,201 INFO L87 Difference]: Start difference. First operand 665510 states and 1027052 transitions. Second operand 9 states.